SATA link power management issues

[Gabriele Mazzotta]

Hi,

I'm having some problems with the link_power_management_policy on my
Dell XPS13 9333.
Changing policy from min_power or medium_power to max_performance
causes the following errors:

[ 3955.667086] ahci 0000:00:1f.2: port does not support device sleep
[ 3958.257106] ata3.00: exception Emask 0x10 SAct 0x40 SErr 0x50000 action 0xe frozen
[ 3958.257110] ata3.00: irq_stat 0x00400000, PHY RDY changed
[ 3958.257113] ata3: SError: { PHYRdyChg CommWake }
[ 3958.257116] ata3.00: failed command: READ FPDMA QUEUED
[ 3958.257120] ata3.00: cmd 60/00:30:c8:60:10/01:00:1d:00:00/40 tag 6 ncq 131072 in
res 40/00:34:c8:60:10/00:00:1d:00:00/40 Emask 0x10 (ATA bus error)
[ 3958.257122] ata3.00: status: { DRDY }
[ 3958.257126] ata3: hard resetting link
[ 3958.981727] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3958.984994] ata3.00: configured for UDMA/133
[ 3958.997686] ahci 0000:00:1f.2: port does not support device sleep
[ 3958.997698] ata3: EH complete

Sometimes I get "failed command: WRITE FPDMA QUEUED" multiple times.

As far as I know, this had always happened and it was confirmed
by another user. I've also come across some logs of the same system
and saw the same errors here and there, so it shouldn't be a problem
of my laptop in particular.

What I find interesting is that transitions from min_power to
medium_power and vice versa do not cause these errors. There are only
problem switching from min_power and medium_power to max_performance.
Doing the opposite, i.e. from max_performance to min_power or
medium_power, seems to work fine.

As a consequence of these continuous errors, the speed is reduced
from 6.0 Gbps to 1.5 Gbps.

I'd prefer not to disable LPM as it saves a considerable amount of
power when I'm using the battery. For this reason I'm currently using
medium_power and min_power only to prevent errors.

Is it normal that these errors appears only when I switch to
max_performance? Was something similar observed on other systems?

Thanks,
Gabriele
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[Tejun Heo]

Hello, Gabriele.

Post by Gabriele Mazzotta
I'm having some problems with the link_power_management_policy on my
Dell XPS13 9333.
Changing policy from min_power or medium_power to max_performance
[ 3955.667086] ahci 0000:00:1f.2: port does not support device sleep
[ 3958.257106] ata3.00: exception Emask 0x10 SAct 0x40 SErr 0x50000 action 0xe frozen
[ 3958.257110] ata3.00: irq_stat 0x00400000, PHY RDY changed
[ 3958.257113] ata3: SError: { PHYRdyChg CommWake }
[ 3958.257116] ata3.00: failed command: READ FPDMA QUEUED
[ 3958.257120] ata3.00: cmd 60/00:30:c8:60:10/01:00:1d:00:00/40 tag 6 ncq 131072 in
res 40/00:34:c8:60:10/00:00:1d:00:00/40 Emask 0x10 (ATA bus error)
[ 3958.257122] ata3.00: status: { DRDY }
[ 3958.257126] ata3: hard resetting link
[ 3958.981727] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3958.984994] ata3.00: configured for UDMA/133
[ 3958.997686] ahci 0000:00:1f.2: port does not support device sleep

Ah, it actually happens.

Post by Gabriele Mazzotta
[ 3958.997698] ata3: EH complete
Sometimes I get "failed command: WRITE FPDMA QUEUED" multiple times.
As far as I know, this had always happened and it was confirmed
by another user. I've also come across some logs of the same system
and saw the same errors here and there, so it shouldn't be a problem
of my laptop in particular.
What I find interesting is that transitions from min_power to
medium_power and vice versa do not cause these errors. There are only
problem switching from min_power and medium_power to max_performance.
Doing the opposite, i.e. from max_performance to min_power or
medium_power, seems to work fine.
As a consequence of these continuous errors, the speed is reduced
from 6.0 Gbps to 1.5 Gbps.

Always? Or does it sometimes get lucky and stabilize at a higher
speed?

Post by Gabriele Mazzotta
I'd prefer not to disable LPM as it saves a considerable amount of
power when I'm using the battery. For this reason I'm currently using
medium_power and min_power only to prevent errors.
Is it normal that these errors appears only when I switch to
max_performance? Was something similar observed on other systems?

It's not normal. It definitely doesn't happen with all devices. I
guess it could be a quirk from the device side. What's on the other
side of the connector? Can you post the full kernel log after such
incidence?

Thanks.

[Gabriele Mazzotta]

Post by Tejun Heo
Hello, Gabriele.

Post by Gabriele Mazzotta
I'm having some problems with the link_power_management_policy on my
Dell XPS13 9333.
Changing policy from min_power or medium_power to max_performance
[ 3955.667086] ahci 0000:00:1f.2: port does not support device sleep
[ 3958.257106] ata3.00: exception Emask 0x10 SAct 0x40 SErr 0x50000 action 0xe frozen
[ 3958.257110] ata3.00: irq_stat 0x00400000, PHY RDY changed
[ 3958.257113] ata3: SError: { PHYRdyChg CommWake }
[ 3958.257116] ata3.00: failed command: READ FPDMA QUEUED
[ 3958.257120] ata3.00: cmd 60/00:30:c8:60:10/01:00:1d:00:00/40 tag 6 ncq 131072 in
res 40/00:34:c8:60:10/00:00:1d:00:00/40 Emask 0x10 (ATA bus error)
[ 3958.257122] ata3.00: status: { DRDY }
[ 3958.257126] ata3: hard resetting link
[ 3958.981727] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3958.984994] ata3.00: configured for UDMA/133
[ 3958.997686] ahci 0000:00:1f.2: port does not support device sleep

Ah, it actually happens.

Post by Gabriele Mazzotta
[ 3958.997698] ata3: EH complete
Sometimes I get "failed command: WRITE FPDMA QUEUED" multiple times.
As far as I know, this had always happened and it was confirmed
by another user. I've also come across some logs of the same system
and saw the same errors here and there, so it shouldn't be a problem
of my laptop in particular.
What I find interesting is that transitions from min_power to
medium_power and vice versa do not cause these errors. There are only
problem switching from min_power and medium_power to max_performance.
Doing the opposite, i.e. from max_performance to min_power or
medium_power, seems to work fine.
As a consequence of these continuous errors, the speed is reduced
from 6.0 Gbps to 1.5 Gbps.

Always? Or does it sometimes get lucky and stabilize at a higher
speed?

Let's say I need to change the policy a few times before 1.5 Gbps are
reached and the speed is always lowered to 3.0 Gbps first.
I've never noticed any different trend, but I haven't observed this
problem enough. The policy is normally changed when I plug and unplug
my laptop, so not frequently enough to be a 100% sure.

I could do some tests though, all I need is to do is change the policy
a bunch of times.

Post by Tejun Heo

Post by Gabriele Mazzotta
I'd prefer not to disable LPM as it saves a considerable amount of
power when I'm using the battery. For this reason I'm currently using
medium_power and min_power only to prevent errors.
Is it normal that these errors appears only when I switch to
max_performance? Was something similar observed on other systems?

It's not normal. It definitely doesn't happen with all devices. I
guess it could be a quirk from the device side. What's on the other
side of the connector? Can you post the full kernel log after such
incidence?

There's connected an SSD. Let me know if you need more information than
those in the dmesg here below.

"setting max_performance" and "setting min_power" were added by me.


[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 3.19.0-rc2+ (***@xps13) (gcc version 4.9.2 (Debian 4.9.2-10) ) #8 SMP Thu Jan 8 19:37:54 CET 2015
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.19.0-rc2+ root=/dev/sda6 ro quiet rootfstype=ext4 resume=/dev/sda3 possible_cpus=4
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x0000000000057fff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000000058000-0x0000000000058fff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000059000-0x000000000009cfff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000009d000-0x00000000000bffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x0000000081afcfff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000081afd000-0x0000000081cfefff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000081cff000-0x00000000dadb6fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000dadb7000-0x00000000dafb6fff] type 20
[ 0.000000] BIOS-e820: [mem 0x00000000dafb7000-0x00000000dceeefff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000dceef000-0x00000000dcf9efff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x00000000dcf9f000-0x00000000dcffefff] ACPI data
[ 0.000000] BIOS-e820: [mem 0x00000000dcfff000-0x00000000dcffffff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000dd000000-0x00000000df9fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000f80f8000-0x00000000f80f8fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fe101000-0x00000000fe112fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000021f5fffff] usable
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] efi: EFI v2.31 by Phoenix Technologies Ltd.
[ 0.000000] efi: ACPI=0xdcffe000 ACPI 2.0=0xdcffe014 SMBIOS=0xdcc45000
[ 0.000000] efi: mem00: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x0000000000000000-0x0000000000058000) (0MB)
[ 0.000000] efi: mem01: [Reserved | | | | | |WB|WT|WC|UC] range=[0x0000000000058000-0x0000000000059000) (0MB)
[ 0.000000] efi: mem02: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x0000000000059000-0x000000000009d000) (0MB)
[ 0.000000] efi: mem03: [Reserved | | | | | |WB|WT|WC|UC] range=[0x000000000009d000-0x00000000000a0000) (0MB)
[ 0.000000] efi: mem04: [Reserved | | | | | | | | | ] range=[0x00000000000e0000-0x0000000000100000) (0MB)
[ 0.000000] efi: mem05: [Loader Data | | | | | |WB|WT|WC|UC] range=[0x0000000000100000-0x000000000133b000) (18MB)
[ 0.000000] efi: mem06: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x000000000133b000-0x0000000001400000) (0MB)
[ 0.000000] efi: mem07: [Loader Data | | | | | |WB|WT|WC|UC] range=[0x0000000001400000-0x000000000263b000) (18MB)
[ 0.000000] efi: mem08: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x000000000263b000-0x0000000049fce000) (1145MB)
[ 0.000000] efi: mem09: [Loader Data | | | | | |WB|WT|WC|UC] range=[0x0000000049fce000-0x000000007fa57000) (858MB)
[ 0.000000] efi: mem10: [Boot Data | | | | | |WB|WT|WC|UC] range=[0x000000007fa57000-0x000000007fa77000) (0MB)
[ 0.000000] efi: mem11: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x000000007fa77000-0x0000000081ae6000) (32MB)
[ 0.000000] efi: mem12: [Boot Data | | | | | |WB|WT|WC|UC] range=[0x0000000081ae6000-0x0000000081afd000) (0MB)
[ 0.000000] efi: mem13: [Reserved | | | | | |WB|WT|WC|UC] range=[0x0000000081afd000-0x0000000081cff000) (2MB)
[ 0.000000] efi: mem14: [Boot Data | | | | | |WB|WT|WC|UC] range=[0x0000000081cff000-0x0000000082a47000) (13MB)
[ 0.000000] efi: mem15: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x0000000082a47000-0x00000000c5af4000) (1072MB)
[ 0.000000] efi: mem16: [Loader Code | | | | | |WB|WT|WC|UC] range=[0x00000000c5af4000-0x00000000c5b12000) (0MB)
[ 0.000000] efi: mem17: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x00000000c5b12000-0x00000000cd648000) (123MB)
[ 0.000000] efi: mem18: [Boot Data | | | | | |WB|WT|WC|UC] range=[0x00000000cd648000-0x00000000cd649000) (0MB)
[ 0.000000] efi: mem19: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x00000000cd649000-0x00000000cd65a000) (0MB)
[ 0.000000] efi: mem20: [Boot Data | | | | | |WB|WT|WC|UC] range=[0x00000000cd65a000-0x00000000cf183000) (27MB)
[ 0.000000] efi: mem21: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x00000000cf183000-0x00000000cf184000) (0MB)
[ 0.000000] efi: mem22: [Boot Data | | | | | |WB|WT|WC|UC] range=[0x00000000cf184000-0x00000000cf69d000) (5MB)
[ 0.000000] efi: mem23: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x00000000cf69d000-0x00000000cf6b0000) (0MB)
[ 0.000000] efi: mem24: [Boot Data | | | | | |WB|WT|WC|UC] range=[0x00000000cf6b0000-0x00000000d045e000) (13MB)
[ 0.000000] efi: mem25: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x00000000d045e000-0x00000000da8b2000) (164MB)
[ 0.000000] efi: mem26: [Loader Data | | | | | |WB|WT|WC|UC] range=[0x00000000da8b2000-0x00000000da8bb000) (0MB)
[ 0.000000] efi: mem27: [Boot Code | | | | | |WB|WT|WC|UC] range=[0x00000000da8bb000-0x00000000dadb7000) (4MB)
[ 0.000000] efi: mem28: [Runtime Code |RUN| | | | |WB|WT|WC|UC] range=[0x00000000dadb7000-0x00000000dafb7000) (2MB)
[ 0.000000] efi: mem29: [Runtime Data |RUN| | | | |WB|WT|WC|UC] range=[0x00000000dafb7000-0x00000000dc8d7000) (25MB)
[ 0.000000] efi: mem30: [Reserved | | | | | |WB|WT|WC|UC] range=[0x00000000dc8d7000-0x00000000dceef000) (6MB)
[ 0.000000] efi: mem31: [ACPI Memory NVS | | | | | |WB|WT|WC|UC] range=[0x00000000dceef000-0x00000000dcf9f000) (0MB)
[ 0.000000] efi: mem32: [ACPI Reclaim Memory| | | | | |WB|WT|WC|UC] range=[0x00000000dcf9f000-0x00000000dcfff000) (0MB)
[ 0.000000] efi: mem33: [Boot Data | | | | | |WB|WT|WC|UC] range=[0x00000000dcfff000-0x00000000dd000000) (0MB)
[ 0.000000] efi: mem34: [Conventional Memory| | | | | |WB|WT|WC|UC] range=[0x0000000100000000-0x000000021f600000) (4598MB)
[ 0.000000] efi: mem35: [Reserved | | | | | | | | | ] range=[0x00000000000a0000-0x00000000000c0000) (0MB)
[ 0.000000] efi: mem36: [Reserved | | | | | | | | | ] range=[0x00000000dd000000-0x00000000dfa00000) (42MB)
[ 0.000000] efi: mem37: [Memory Mapped I/O |RUN| | | | | | | |UC] range=[0x00000000f80f8000-0x00000000f80f9000) (0MB)
[ 0.000000] efi: mem38: [Reserved | | | | | | | | | ] range=[0x00000000fe101000-0x00000000fe113000) (0MB)
[ 0.000000] efi: mem39: [Memory Mapped I/O |RUN| | | | | | | |UC] range=[0x00000000fed1c000-0x00000000fed20000) (0MB)
[ 0.000000] efi: mem40: [Reserved | | | | | | | | | ] range=[0x0000000000000000-0x0000000000000000) (0MB)
[ 0.000000] efi: mem41: [Reserved | | | | | | | | | ] range=[0x0000000000000000-0x0000000000000000) (0MB)
[ 0.000000] efi: mem42: [Reserved | | | | | | | | | ] range=[0x0000000000000000-0x0000000000000000) (0MB)
[ 0.000000] efi: mem43: [Reserved | | | | | | | | | ] range=[0x0000000000000000-0x0000000000000000) (0MB)
[ 0.000000] efi: mem44: [Reserved | | | | | | | | | ] range=[0x0000000000000000-0x0000000000000000) (0MB)
[ 0.000000] SMBIOS 2.7 present.
[ 0.000000] DMI: Dell Inc. XPS13 9333/0GFTRT, BIOS A06 11/07/2014
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] e820: last_pfn = 0x21f600 max_arch_pfn = 0x400000000
[ 0.000000] MTRR default type: write-back
[ 0.000000] MTRR fixed ranges enabled:
[ 0.000000] 00000-9FFFF write-back
[ 0.000000] A0000-BFFFF uncachable
[ 0.000000] C0000-FFFFF write-protect
[ 0.000000] MTRR variable ranges enabled:
[ 0.000000] 0 base 00E0000000 mask 7FE0000000 uncachable
[ 0.000000] 1 base 00DE000000 mask 7FFE000000 uncachable
[ 0.000000] 2 base 00DD000000 mask 7FFF000000 uncachable
[ 0.000000] 3 disabled
[ 0.000000] 4 disabled
[ 0.000000] 5 disabled
[ 0.000000] 6 disabled
[ 0.000000] 7 disabled
[ 0.000000] 8 disabled
[ 0.000000] 9 disabled
[ 0.000000] PAT configuration [0-7]: WB WC UC- UC WB WC UC- UC
[ 0.000000] e820: last_pfn = 0xdd000 max_arch_pfn = 0x400000000
[ 0.000000] Base memory trampoline at [ffff880000097000] 97000 size 24576
[ 0.000000] Using GB pages for direct mapping
[ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[ 0.000000] [mem 0x00000000-0x000fffff] page 4k
[ 0.000000] BRK [0x022d5000, 0x022d5fff] PGTABLE
[ 0.000000] BRK [0x022d6000, 0x022d6fff] PGTABLE
[ 0.000000] BRK [0x022d7000, 0x022d7fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x21f400000-0x21f5fffff]
[ 0.000000] [mem 0x21f400000-0x21f5fffff] page 2M
[ 0.000000] BRK [0x022d8000, 0x022d8fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x21c000000-0x21f3fffff]
[ 0.000000] [mem 0x21c000000-0x21f3fffff] page 2M
[ 0.000000] init_memory_mapping: [mem 0x200000000-0x21bffffff]
[ 0.000000] [mem 0x200000000-0x21bffffff] page 2M
[ 0.000000] init_memory_mapping: [mem 0x00100000-0x81afcfff]
[ 0.000000] [mem 0x00100000-0x001fffff] page 4k
[ 0.000000] [mem 0x00200000-0x3fffffff] page 2M
[ 0.000000] [mem 0x40000000-0x7fffffff] page 1G
[ 0.000000] [mem 0x80000000-0x819fffff] page 2M
[ 0.000000] [mem 0x81a00000-0x81afcfff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x81cff000-0xdadb6fff]
[ 0.000000] [mem 0x81cff000-0x81dfffff] page 4k
[ 0.000000] [mem 0x81e00000-0xdabfffff] page 2M
[ 0.000000] [mem 0xdac00000-0xdadb6fff] page 4k
[ 0.000000] BRK [0x022d9000, 0x022d9fff] PGTABLE
[ 0.000000] BRK [0x022da000, 0x022dafff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0xdcfff000-0xdcffffff]
[ 0.000000] [mem 0xdcfff000-0xdcffffff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x100000000-0x1ffffffff]
[ 0.000000] [mem 0x100000000-0x1ffffffff] page 1G
[ 0.000000] ACPI: Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 0x00000000DCFFE014 000024 (v02 DELL )
[ 0.000000] ACPI: XSDT 0x00000000DCFFE170 0000C4 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: FACP 0x00000000DCFFB000 00010C (v05 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: DSDT 0x00000000DCFE6000 010640 (v02 DELL HSW-LPT 00000000 INTL 20120711)
[ 0.000000] ACPI: FACS 0x00000000DCF9C000 000040
[ 0.000000] ACPI: ASF! 0x00000000DCFFD000 0000A5 (v32 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: HPET 0x00000000DCFFA000 000038 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: LPIT 0x00000000DCFF9000 000094 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: APIC 0x00000000DCFF8000 000098 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: MCFG 0x00000000DCFF7000 00003C (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: SSDT 0x00000000DCFE5000 000228 (v01 DELL sensrhub 00000000 INTL 20120711)
[ 0.000000] ACPI: SSDT 0x00000000DCFE2000 002028 (v01 DELL PtidDevc 00001000 INTL 20120711)
[ 0.000000] ACPI: SSDT 0x00000000DCFE1000 000539 (v01 DELL Cpu0Ist 00003000 INTL 20120711)
[ 0.000000] ACPI: SSDT 0x00000000DCFE0000 000AD8 (v01 DELL CpuPm 00003000 INTL 20120711)
[ 0.000000] ACPI: SSDT 0x00000000DCFDC000 003688 (v01 DELL SaSsdt 00003000 INTL 20120711)
[ 0.000000] ACPI: UEFI 0x00000000DCFDB000 000042 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: MSDM 0x00000000DCF77000 000055 (v03 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: BATB 0x00000000DCFDA000 000046 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: FPDT 0x00000000DCFD9000 000064 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: SLIC 0x00000000DCFD8000 000176 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: UEFI 0x00000000DCFD7000 0002A6 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: SSDT 0x00000000DCFD6000 0000D0 (v01 DELL IffsAsl 00003000 INTL 20120711)
[ 0.000000] ACPI: BGRT 0x00000000DCFD5000 000038 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: CSRT 0x00000000DCFD4000 0000C4 (v01 DELL QA09 00000002 LOHR 00000002)
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] No NUMA configuration found
[ 0.000000] Faking a node at [mem 0x0000000000000000-0x000000021f5fffff]
[ 0.000000] NODE_DATA(0) allocated [mem 0x21f5f8000-0x21f5fbfff]
[ 0.000000] [ffffea0000000000-ffffea00087fffff] PMD -> [ffff880216c00000-ffff88021ebfffff] on node 0
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x00001000-0x00ffffff]
[ 0.000000] DMA32 [mem 0x01000000-0xffffffff]
[ 0.000000] Normal [mem 0x100000000-0x21f5fffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00001000-0x00057fff]
[ 0.000000] node 0: [mem 0x00059000-0x0009cfff]
[ 0.000000] node 0: [mem 0x00100000-0x81afcfff]
[ 0.000000] node 0: [mem 0x81cff000-0xdadb6fff]
[ 0.000000] node 0: [mem 0xdcfff000-0xdcffffff]
[ 0.000000] node 0: [mem 0x100000000-0x21f5fffff]
[ 0.000000] Initmem setup node 0 [mem 0x00001000-0x21f5fffff]
[ 0.000000] On node 0 totalpages: 2072913
[ 0.000000] DMA zone: 64 pages used for memmap
[ 0.000000] DMA zone: 22 pages reserved
[ 0.000000] DMA zone: 3995 pages, LIFO batch:0
[ 0.000000] DMA32 zone: 13935 pages used for memmap
[ 0.000000] DMA32 zone: 891830 pages, LIFO batch:31
[ 0.000000] Normal zone: 18392 pages used for memmap
[ 0.000000] Normal zone: 1177088 pages, LIFO batch:31
[ 0.000000] Reserving Intel graphics stolen memory at 0xdda00000-0xdf9fffff
[ 0.000000] ACPI: PM-Timer IO Port: 0x1808
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x02] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x03] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x00] disabled)
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
[ 0.000000] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
[ 0.000000] IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-39
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.000000] ACPI: IRQ0 used by override.
[ 0.000000] ACPI: IRQ9 used by override.
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] ACPI: HPET id: 0x8086a301 base: 0xfed00000
[ 0.000000] smpboot: Allowing 4 CPUs, 0 hotplug CPUs
[ 0.000000] PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.000000] PM: Registered nosave memory: [mem 0x00058000-0x00058fff]
[ 0.000000] PM: Registered nosave memory: [mem 0x0009d000-0x000bffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000c0000-0x000dffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000e0000-0x000fffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x81afd000-0x81cfefff]
[ 0.000000] PM: Registered nosave memory: [mem 0xdadb7000-0xdafb6fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xdafb7000-0xdceeefff]
[ 0.000000] PM: Registered nosave memory: [mem 0xdceef000-0xdcf9efff]
[ 0.000000] PM: Registered nosave memory: [mem 0xdcf9f000-0xdcffefff]
[ 0.000000] PM: Registered nosave memory: [mem 0xdd000000-0xdf9fffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xdfa00000-0xf80f7fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xf80f8000-0xf80f8fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xf80f9000-0xfe100fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfe101000-0xfe112fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfe113000-0xfed1bfff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed1c000-0xfed1ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed20000-0xffffffff]
[ 0.000000] e820: [mem 0xdfa00000-0xf80f7fff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on bare hardware
[ 0.000000] setup_percpu: NR_CPUS:4 nr_cpumask_bits:4 nr_cpu_ids:4 nr_node_ids:1
[ 0.000000] PERCPU: Embedded 30 pages/cpu @ffff88021f200000 s85824 r8192 d28864 u524288
[ 0.000000] pcpu-alloc: s85824 r8192 d28864 u524288 alloc=1*2097152
[ 0.000000] pcpu-alloc: [0] 0 1 2 3
[ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 2040500
[ 0.000000] Policy zone: Normal
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.19.0-rc2+ root=/dev/sda6 ro quiet rootfstype=ext4 resume=/dev/sda3 possible_cpus=4
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 using standard form
[ 0.000000] Calgary: detecting Calgary via BIOS EBDA area
[ 0.000000] Calgary: Unable to locate Rio Grande table in EBDA - bailing!
[ 0.000000] Memory: 8012492K/8291652K available (6672K kernel code, 847K rwdata, 2312K rodata, 1224K init, 792K bss, 279160K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU dyntick-idle grace-period acceleration is enabled.
[ 0.000000] NR_IRQS:4352 nr_irqs:728 16
[ 0.000000] Console: colour dummy device 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] hpet clockevent registered
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 2394.309 MHz processor
[ 0.000037] Calibrating delay loop (skipped), value calculated using timer frequency.. 4788.61 BogoMIPS (lpj=9577236)
[ 0.000039] pid_max: default: 32768 minimum: 301
[ 0.000045] ACPI: Core revision 20141107
[ 0.018609] ACPI: All ACPI Tables successfully acquired
[ 0.055353] Security Framework initialized
[ 0.055360] AppArmor: AppArmor disabled by boot time parameter
[ 0.055361] Yama: becoming mindful.
[ 0.055963] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
[ 0.057399] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
[ 0.057975] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes)
[ 0.057987] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes)
[ 0.058207] Initializing cgroup subsys devices
[ 0.058210] Initializing cgroup subsys freezer
[ 0.058213] Initializing cgroup subsys net_cls
[ 0.058215] Initializing cgroup subsys blkio
[ 0.058217] Initializing cgroup subsys bfqio
[ 0.058219] Initializing cgroup subsys net_prio
[ 0.058246] CPU: Physical Processor ID: 0
[ 0.058247] CPU: Processor Core ID: 0
[ 0.058252] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'
ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8)
[ 0.059439] mce: CPU supports 7 MCE banks
[ 0.059453] CPU0: Thermal monitoring enabled (TM1)
[ 0.059465] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024
Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4
[ 0.059619] Freeing SMP alternatives memory: 24K (ffffffff81e07000 - ffffffff81e0d000)
[ 0.060625] Ignoring BGRT: invalid status 0 (expected 1)
[ 0.062825] ftrace: allocating 25706 entries in 101 pages
[ 0.075439] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 0.115154] smpboot: CPU0: Intel(R) Core(TM) i7-4500U CPU @ 1.80GHz (fam: 06, model: 45, stepping: 01)
[ 0.115163] TSC deadline timer enabled
[ 0.115187] Performance Events: PEBS fmt2+, 16-deep LBR, Haswell events, full-width counters, Intel PMU driver.
[ 0.115212] ... version: 3
[ 0.115213] ... bit width: 48
[ 0.115214] ... generic registers: 4
[ 0.115215] ... value mask: 0000ffffffffffff
[ 0.115216] ... max period: 0000ffffffffffff
[ 0.115217] ... fixed-purpose events: 3
[ 0.115218] ... event mask: 000000070000000f
[ 0.115479] x86: Booting SMP configuration:
[ 0.115481] .... node #0, CPUs: #1
[ 0.130070] NMI watchdog: enabled on all CPUs, permanently consumes one hw-PMU counter.
[ 0.130150] #2 #3
[ 0.158916] x86: Booted up 1 node, 4 CPUs
[ 0.158919] smpboot: Total of 4 processors activated (19154.47 BogoMIPS)
[ 0.164367] devtmpfs: initialized
[ 0.167096] PM: Registering ACPI NVS region [mem 0xdceef000-0xdcf9efff] (720896 bytes)
[ 0.167273] pinctrl core: initialized pinctrl subsystem
[ 0.167378] NET: Registered protocol family 16
[ 0.176237] cpuidle: using governor ladder
[ 0.192246] cpuidle: using governor menu
[ 0.192321] ACPI: bus type PCI registered
[ 0.192323] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.192394] PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xf8000000-0xfbffffff] (base 0xf8000000)
[ 0.192397] PCI: not using MMCONFIG
[ 0.192398] PCI: Using configuration type 1 for base access
[ 0.192518] dmi type 0xB1 record - unknown flag
[ 0.204611] ACPI: Added _OSI(Module Device)
[ 0.204613] ACPI: Added _OSI(Processor Device)
[ 0.204615] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.204616] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.209431] ACPI: Executed 1 blocks of module-level executable AML code
[ 0.212861] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[ 0.213938] ACPI: Dynamic OEM Table Load:
[ 0.213950] ACPI: SSDT 0xFFFF880215416000 0003D3 (v01 PmRef Cpu0Cst 00003001 INTL 20120711)
[ 0.214806] ACPI: Dynamic OEM Table Load:
[ 0.214816] ACPI: SSDT 0xFFFF88021543A000 0005AA (v01 PmRef ApIst 00003000 INTL 20120711)
[ 0.215717] ACPI: Dynamic OEM Table Load:
[ 0.215726] ACPI: SSDT 0xFFFF880215494200 000119 (v01 PmRef ApCst 00003000 INTL 20120711)
[ 0.219609] ACPI: Interpreter enabled
[ 0.219628] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20141107/hwxface-580)
[ 0.219651] ACPI: (supports S0 S1 S3 S4 S5)
[ 0.219652] ACPI: Using IOAPIC for interrupt routing
[ 0.219675] PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xf8000000-0xfbffffff] (base 0xf8000000)
[ 0.220194] PCI: MMCONFIG at [mem 0xf8000000-0xfbffffff] reserved in ACPI motherboard resources
[ 0.220311] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.232852] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-3e])
[ 0.232859] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
[ 0.232996] \_SB_.PCI0:_OSC invalid UUID
[ 0.232997] _OSC request data:1 1f 0
[ 0.233001] acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM
[ 0.233540] PCI host bridge to bus 0000:00
[ 0.233543] pci_bus 0000:00: root bus resource [bus 00-3e]
[ 0.233545] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7]
[ 0.233547] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff]
[ 0.233549] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff]
[ 0.233551] pci_bus 0000:00: root bus resource [mem 0x000c0000-0x000c3fff]
[ 0.233552] pci_bus 0000:00: root bus resource [mem 0x000c4000-0x000c7fff]
[ 0.233554] pci_bus 0000:00: root bus resource [mem 0x000c8000-0x000cbfff]
[ 0.233556] pci_bus 0000:00: root bus resource [mem 0x000cc000-0x000cffff]
[ 0.233557] pci_bus 0000:00: root bus resource [mem 0x000d0000-0x000d3fff]
[ 0.233559] pci_bus 0000:00: root bus resource [mem 0x000d4000-0x000d7fff]
[ 0.233561] pci_bus 0000:00: root bus resource [mem 0x000d8000-0x000dbfff]
[ 0.233562] pci_bus 0000:00: root bus resource [mem 0x000dc000-0x000dffff]
[ 0.233564] pci_bus 0000:00: root bus resource [mem 0x000e0000-0x000e3fff]
[ 0.233565] pci_bus 0000:00: root bus resource [mem 0x000e4000-0x000e7fff]
[ 0.233567] pci_bus 0000:00: root bus resource [mem 0x000e8000-0x000ebfff]
[ 0.233569] pci_bus 0000:00: root bus resource [mem 0x000ec000-0x000effff]
[ 0.233570] pci_bus 0000:00: root bus resource [mem 0xdfa00000-0xfeafffff]
[ 0.233580] pci 0000:00:00.0: [8086:0a04] type 00 class 0x060000
[ 0.233778] pci 0000:00:02.0: [8086:0a16] type 00 class 0x030000
[ 0.233792] pci 0000:00:02.0: reg 0x10: [mem 0xf0000000-0xf03fffff 64bit]
[ 0.233800] pci 0000:00:02.0: reg 0x18: [mem 0xe0000000-0xefffffff 64bit pref]
[ 0.233806] pci 0000:00:02.0: reg 0x20: [io 0x3000-0x303f]
[ 0.233989] pci 0000:00:03.0: [8086:0a0c] type 00 class 0x040300
[ 0.233999] pci 0000:00:03.0: reg 0x10: [mem 0xf0510000-0xf0513fff 64bit]
[ 0.234210] pci 0000:00:14.0: [8086:9c31] type 00 class 0x0c0330
[ 0.234229] pci 0000:00:14.0: reg 0x10: [mem 0xf0500000-0xf050ffff 64bit]
[ 0.234294] pci 0000:00:14.0: PME# supported from D3hot D3cold
[ 0.234424] pci 0000:00:14.0: System wakeup disabled by ACPI
[ 0.234465] pci 0000:00:16.0: [8086:9c3a] type 00 class 0x078000
[ 0.234486] pci 0000:00:16.0: reg 0x10: [mem 0xf0519000-0xf051901f 64bit]
[ 0.234562] pci 0000:00:16.0: PME# supported from D0 D3hot D3cold
[ 0.234738] pci 0000:00:1b.0: [8086:9c20] type 00 class 0x040300
[ 0.234753] pci 0000:00:1b.0: reg 0x10: [mem 0xf0514000-0xf0517fff 64bit]
[ 0.234825] pci 0000:00:1b.0: PME# supported from D0 D3hot D3cold
[ 0.234956] pci 0000:00:1b.0: System wakeup disabled by ACPI
[ 0.234999] pci 0000:00:1c.0: [8086:9c10] type 01 class 0x060400
[ 0.235083] pci 0000:00:1c.0: PME# supported from D0 D3hot D3cold
[ 0.235218] pci 0000:00:1c.0: System wakeup disabled by ACPI
[ 0.235261] pci 0000:00:1c.2: [8086:9c14] type 01 class 0x060400
[ 0.235348] pci 0000:00:1c.2: PME# supported from D0 D3hot D3cold
[ 0.235484] pci 0000:00:1c.2: System wakeup disabled by ACPI
[ 0.235531] pci 0000:00:1d.0: [8086:9c26] type 00 class 0x0c0320
[ 0.235552] pci 0000:00:1d.0: reg 0x10: [mem 0xf051d000-0xf051d3ff]
[ 0.235649] pci 0000:00:1d.0: PME# supported from D0 D3hot D3cold
[ 0.235796] pci 0000:00:1d.0: System wakeup disabled by ACPI
[ 0.235837] pci 0000:00:1f.0: [8086:9c43] type 00 class 0x060100
[ 0.236112] pci 0000:00:1f.2: [8086:9c03] type 00 class 0x010601
[ 0.236128] pci 0000:00:1f.2: reg 0x10: [io 0x3088-0x308f]
[ 0.236135] pci 0000:00:1f.2: reg 0x14: [io 0x3094-0x3097]
[ 0.236143] pci 0000:00:1f.2: reg 0x18: [io 0x3080-0x3087]
[ 0.236150] pci 0000:00:1f.2: reg 0x1c: [io 0x3090-0x3093]
[ 0.236157] pci 0000:00:1f.2: reg 0x20: [io 0x3060-0x307f]
[ 0.236165] pci 0000:00:1f.2: reg 0x24: [mem 0xf051c000-0xf051c7ff]
[ 0.236206] pci 0000:00:1f.2: PME# supported from D3hot
[ 0.236374] pci 0000:00:1f.3: [8086:9c22] type 00 class 0x0c0500
[ 0.236389] pci 0000:00:1f.3: reg 0x10: [mem 0xf0518000-0xf05180ff 64bit]
[ 0.236409] pci 0000:00:1f.3: reg 0x20: [io 0xefa0-0xefbf]
[ 0.236651] pci 0000:00:1c.0: PCI bridge to [bus 01]
[ 0.236760] pci 0000:02:00.0: [8086:08b1] type 00 class 0x028000
[ 0.236807] pci 0000:02:00.0: reg 0x10: [mem 0xf0400000-0xf0401fff 64bit]
[ 0.237018] pci 0000:02:00.0: PME# supported from D0 D3hot D3cold
[ 0.237065] pci 0000:02:00.0: System wakeup disabled by ACPI
[ 0.244359] pci 0000:00:1c.2: PCI bridge to [bus 02]
[ 0.244365] pci 0000:00:1c.2: bridge window [mem 0xf0400000-0xf04fffff]
[ 0.245734] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[ 0.245788] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[ 0.245841] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[ 0.245895] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[ 0.245946] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[ 0.245996] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[ 0.246047] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[ 0.246097] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[ 0.246390] ACPI: Enabled 5 GPEs in block 00 to 7F
[ 0.246451] ACPI : EC: GPE = 0xa, I/O: command/status = 0x66, data = 0x62
[ 0.246588] SCSI subsystem initialized
[ 0.246632] libata version 3.00 loaded.
[ 0.246729] PCI: Using ACPI for IRQ routing
[ 0.248127] PCI: pci_cache_line_size set to 64 bytes
[ 0.248191] e820: reserve RAM buffer [mem 0x00058000-0x0005ffff]
[ 0.248192] e820: reserve RAM buffer [mem 0x0009d000-0x0009ffff]
[ 0.248194] e820: reserve RAM buffer [mem 0x81afd000-0x83ffffff]
[ 0.248195] e820: reserve RAM buffer [mem 0xdadb7000-0xdbffffff]
[ 0.248197] e820: reserve RAM buffer [mem 0xdd000000-0xdfffffff]
[ 0.248198] e820: reserve RAM buffer [mem 0x21f600000-0x21fffffff]
[ 0.248360] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0, 0, 0, 0, 0
[ 0.248366] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
[ 0.250389] Switched to clocksource hpet
[ 0.253406] pnp: PnP ACPI init
[ 0.253532] system 00:00: [io 0x0680-0x069f] has been reserved
[ 0.253536] system 00:00: [io 0xffff] has been reserved
[ 0.253539] system 00:00: [io 0xffff] has been reserved
[ 0.253541] system 00:00: [io 0xffff] has been reserved
[ 0.253544] system 00:00: [io 0x1800-0x18fe] could not be reserved
[ 0.253546] system 00:00: [io 0x164e-0x164f] has been reserved
[ 0.253550] system 00:00: Plug and Play ACPI device, IDs PNP0c02 (active)
[ 0.253599] pnp 00:01: Plug and Play ACPI device, IDs PNP0b00 (active)
[ 0.253647] system 00:02: [io 0x1854-0x1857] has been reserved
[ 0.253650] system 00:02: Plug and Play ACPI device, IDs INT3f0d PNP0c02 (active)
[ 0.253691] pnp 00:03: Plug and Play ACPI device, IDs PNP0303 (active)
[ 0.253723] pnp 00:04: Plug and Play ACPI device, IDs SYN0608 PNP0f03 (active)
[ 0.253856] system 00:05: [mem 0xfed1c000-0xfed1ffff] has been reserved
[ 0.253859] system 00:05: [mem 0xfed10000-0xfed17fff] has been reserved
[ 0.253861] system 00:05: [mem 0xfed18000-0xfed18fff] has been reserved
[ 0.253864] system 00:05: [mem 0xfed19000-0xfed19fff] has been reserved
[ 0.253866] system 00:05: [mem 0xf8000000-0xfbffffff] could not be reserved
[ 0.253869] system 00:05: [mem 0xfed20000-0xfed3ffff] has been reserved
[ 0.253871] system 00:05: [mem 0xfed90000-0xfed93fff] has been reserved
[ 0.253874] system 00:05: [mem 0xfed45000-0xfed8ffff] has been reserved
[ 0.253876] system 00:05: [mem 0xff000000-0xffffffff] has been reserved
[ 0.253879] system 00:05: [mem 0xfee00000-0xfeefffff] has been reserved
[ 0.253881] system 00:05: [mem 0xdfa10000-0xdfa1ffff] has been reserved
[ 0.253884] system 00:05: Plug and Play ACPI device, IDs PNP0c02 (active)
[ 0.254221] system 00:06: [mem 0xfe102000-0xfe102fff] has been reserved
[ 0.254224] system 00:06: [mem 0xfe104000-0xfe104fff] has been reserved
[ 0.254227] system 00:06: [mem 0xfe106000-0xfe106fff] has been reserved
[ 0.254229] system 00:06: Plug and Play ACPI device, IDs PNP0c02 (active)
[ 0.254943] pnp: PnP ACPI: found 7 devices
[ 0.261217] pci 0000:00:1c.0: PCI bridge to [bus 01]
[ 0.261232] pci 0000:00:1c.2: PCI bridge to [bus 02]
[ 0.261237] pci 0000:00:1c.2: bridge window [mem 0xf0400000-0xf04fffff]
[ 0.261246] pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7]
[ 0.261248] pci_bus 0000:00: resource 5 [io 0x0d00-0xffff]
[ 0.261250] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff]
[ 0.261252] pci_bus 0000:00: resource 7 [mem 0x000c0000-0x000c3fff]
[ 0.261253] pci_bus 0000:00: resource 8 [mem 0x000c4000-0x000c7fff]
[ 0.261255] pci_bus 0000:00: resource 9 [mem 0x000c8000-0x000cbfff]
[ 0.261257] pci_bus 0000:00: resource 10 [mem 0x000cc000-0x000cffff]
[ 0.261258] pci_bus 0000:00: resource 11 [mem 0x000d0000-0x000d3fff]
[ 0.261260] pci_bus 0000:00: resource 12 [mem 0x000d4000-0x000d7fff]
[ 0.261262] pci_bus 0000:00: resource 13 [mem 0x000d8000-0x000dbfff]
[ 0.261263] pci_bus 0000:00: resource 14 [mem 0x000dc000-0x000dffff]
[ 0.261265] pci_bus 0000:00: resource 15 [mem 0x000e0000-0x000e3fff]
[ 0.261267] pci_bus 0000:00: resource 16 [mem 0x000e4000-0x000e7fff]
[ 0.261268] pci_bus 0000:00: resource 17 [mem 0x000e8000-0x000ebfff]
[ 0.261270] pci_bus 0000:00: resource 18 [mem 0x000ec000-0x000effff]
[ 0.261272] pci_bus 0000:00: resource 19 [mem 0xdfa00000-0xfeafffff]
[ 0.261274] pci_bus 0000:02: resource 1 [mem 0xf0400000-0xf04fffff]
[ 0.261301] NET: Registered protocol family 2
[ 0.261497] TCP established hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.261661] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
[ 0.261791] TCP: Hash tables configured (established 65536 bind 65536)
[ 0.261809] TCP: reno registered
[ 0.261824] UDP hash table entries: 4096 (order: 5, 131072 bytes)
[ 0.261855] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes)
[ 0.261911] NET: Registered protocol family 1
[ 0.261929] pci 0000:00:02.0: Video device with shadowed ROM
[ 0.262007] pci 0000:00:14.0: can't derive routing for PCI INT A
[ 0.262009] pci 0000:00:14.0: PCI INT A: no GSI
[ 0.262218] PCI: CLS 64 bytes, default 64
[ 0.262264] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[ 0.262267] software IO TLB [mem 0xd68bb000-0xda8bb000] (64MB) mapped at [ffff8800d68bb000-ffff8800da8bafff]
[ 0.262475] RAPL PMU detected, hw unit 2^-14 Joules, API unit is 2^-32 Joules, 4 fixed counters 655360 ms ovfl timer
[ 0.262525] microcode: CPU0 sig=0x40651, pf=0x40, revision=0x1c
[ 0.262533] microcode: CPU1 sig=0x40651, pf=0x40, revision=0x1c
[ 0.262542] microcode: CPU2 sig=0x40651, pf=0x40, revision=0x1c
[ 0.262550] microcode: CPU3 sig=0x40651, pf=0x40, revision=0x1c
[ 0.262588] microcode: Microcode Update Driver: v2.00 <***@aivazian.fsnet.co.uk>, Peter Oruba
[ 0.262852] simple-framebuffer simple-framebuffer.0: framebuffer at 0xe0000000, 0x7e9000 bytes, mapped to 0xffffc90004f00000
[ 0.262854] simple-framebuffer simple-framebuffer.0: format=a8r8g8b8, mode=1920x1080x32, linelength=7680
[ 0.268213] Console: switching to colour frame buffer device 240x67
[ 0.273487] simple-framebuffer simple-framebuffer.0: fb0: simplefb registered!
[ 0.273691] futex hash table entries: 1024 (order: 4, 65536 bytes)
[ 0.273720] audit: initializing netlink subsys (disabled)
[ 0.273730] audit: type=2000 audit(1420844760.264:1): initialized
[ 0.273938] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.275151] VFS: Disk quotas dquot_6.5.2
[ 0.275182] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.276104] alg: No test for stdrng (krng)
[ 0.276143] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ 0.276181] io scheduler noop registered
[ 0.276185] io scheduler deadline registered
[ 0.276210] io scheduler cfq registered
[ 0.276233] io scheduler bfq registered (default)
[ 0.276234] BFQ I/O-scheduler version: v7r7
[ 0.276547] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 0.276566] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ 0.276583] intel_idle: MWAIT substates: 0x11142120
[ 0.276584] intel_idle: v0.4 model 0x45
[ 0.276585] intel_idle: lapic_timer_reliable_states 0xffffffff
[ 0.276881] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
[ 0.276885] ACPI: Power Button [PWRB]
[ 0.276923] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input1
[ 0.277368] ACPI: Lid Switch [LID0]
[ 0.277410] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input2
[ 0.277413] ACPI: Power Button [PWRF]
[ 0.277469] GHES: HEST is not enabled!
[ 0.277538] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 0.278793] Linux agpgart interface v0.103
[ 0.278821] [drm] Initialized drm 1.1.0 20060810
[ 0.279666] [drm] Memory usable by graphics device = 2048M
[ 0.279670] checking generic (e0000000 7e9000) vs hw (e0000000 10000000)
[ 0.279671] fb: switching to inteldrmfb from simple
[ 0.279687] Console: switching to colour dummy device 80x25
[ 0.279851] [drm] Replacing VGA console driver
[ 0.306596] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 0.306599] [drm] Driver supports precise vblank timestamp query.
[ 0.364283] fbcon: inteldrmfb (fb0) is primary device
[ 0.365832] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
[ 0.366003] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input3
[ 0.366026] [drm] Initialized i915 1.6.0 20141121 for 0000:00:02.0 on minor 0
[ 0.366120] ahci 0000:00:1f.2: version 3.0
[ 0.378572] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 4 ports 6 Gbps 0x4 impl SATA mode
[ 0.378575] ahci 0000:00:1f.2: flags: 64bit ncq pm led clo only pio slum part deso sadm sds apst
[ 0.379132] scsi host0: ahci
[ 0.379374] scsi host1: ahci
[ 0.379632] scsi host2: ahci
[ 0.379887] scsi host3: ahci
[ 0.379938] ata1: DUMMY
[ 0.379938] ata2: DUMMY
[ 0.379941] ata3: SATA max UDMA/133 abar ***@0xf051c000 port 0xf051c200 irq 41
[ 0.379942] ata4: DUMMY
[ 0.380007] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12
[ 0.385398] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 0.385402] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 0.385521] mousedev: PS/2 mouse device common for all mice
[ 0.385622] rtc_cmos 00:01: RTC can wake from S4
[ 0.385775] rtc_cmos 00:01: rtc core: registered rtc_cmos as rtc0
[ 0.385803] rtc_cmos 00:01: alarms up to one month, y3k, 242 bytes nvram, hpet irqs
[ 0.385849] Intel P-state driver initializing.
[ 0.386038] EFI Variables Facility v0.08 2004-May-17
[ 0.393203] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input4
[ 0.398258] pstore: Registered efi as persistent store backend
[ 0.398447] TCP: cubic registered
[ 0.398654] NET: Registered protocol family 10
[ 0.399013] mip6: Mobile IPv6
[ 0.399018] NET: Registered protocol family 17
[ 0.399028] mpls_gso: MPLS GSO support
[ 0.399572] registered taskstats version 1
[ 0.400330] rtc_cmos 00:01: setting system clock to 2015-01-09 23:06:00 UTC (1420844760)
[ 0.400500] PM: Checking hibernation image partition /dev/sda3
[ 0.698842] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 0.701419] ata3.00: ATA-8: LITEONIT LMT-256M6M mSATA 256GB, DM8110F, max UDMA/133
[ 0.701421] ata3.00: 500118192 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[ 0.701982] ata3.00: configured for UDMA/133
[ 1.259281] tsc: Refined TSC clocksource calibration: 2394.460 MHz
[ 1.439646] Console: switching to colour frame buffer device 240x67
[ 1.442780] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 1.442781] i915 0000:00:02.0: registered panic notifier
[ 1.467725] scsi 2:0:0:0: Direct-Access ATA LITEONIT LMT-256 10F PQ: 0 ANSI: 5
[ 1.468095] sd 2:0:0:0: [sda] 500118192 512-byte logical blocks: (256 GB/238 GiB)
[ 1.468551] sd 2:0:0:0: [sda] Write Protect is off
[ 1.468555] sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 1.468667] sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 1.473378] sda: sda1 sda2 sda3 sda4 sda5 sda6
[ 1.473930] sd 2:0:0:0: [sda] Attached SCSI disk
[ 1.473945] PM: Hibernation image partition 8:3 present
[ 1.473947] PM: Looking for hibernation image.
[ 1.474099] PM: Image not found (code -22)
[ 1.474101] PM: Hibernation image not present or could not be loaded.
[ 1.477077] EXT4-fs (sda6): mounted filesystem with ordered data mode. Opts: (null)
[ 1.477088] VFS: Mounted root (ext4 filesystem) readonly on device 8:6.
[ 1.477344] Freeing unused kernel memory: 1224K (ffffffff81cd5000 - ffffffff81e07000)
[ 1.477346] Write protecting the kernel read-only data: 12288k
[ 1.477731] Freeing unused kernel memory: 1508K (ffff880001a87000 - ffff880001c00000)
[ 1.478021] Freeing unused kernel memory: 1784K (ffff880001e42000 - ffff880002000000)
[ 1.512827] systemd[1]: RTC configured in localtime, applying delta of 60 minutes to system time.
[ 1.515673] random: systemd urandom read with 14 bits of entropy available
[ 1.698556] systemd-default-display-manager-generator[78]: No default display manager unit service enabled, setup is manual or a sysvinit file
[ 1.751539] systemd[1]: Cannot add dependency job for unit avahi-daemon.service, ignoring: Unit avahi-daemon.service failed to load: No such file or directory.
[ 1.751563] systemd[1]: Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service failed to load: No such file or directory.
[ 1.776732] lp: driver loaded but no devices found
[ 1.777792] ppdev: user-space parallel port driver
[ 1.782251] fuse init (API version 7.23)
[ 1.793289] systemd-udevd[123]: starting version 215
[ 1.856343] ACPI: bus type USB registered
[ 1.856368] usbcore: registered new interface driver usbfs
[ 1.856379] usbcore: registered new interface driver hub
[ 1.856575] usbcore: registered new device driver usb
[ 1.856603] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 1.858141] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.858712] xhci_hcd 0000:00:14.0: can't derive routing for PCI INT A
[ 1.858714] xhci_hcd 0000:00:14.0: PCI INT A: no GSI
[ 1.858738] xhci_hcd 0000:00:14.0: xHCI Host Controller
[ 1.858742] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1
[ 1.858826] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
[ 1.858888] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.858890] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.858891] usb usb1: Product: xHCI Host Controller
[ 1.858892] usb usb1: Manufacturer: Linux 3.19.0-rc2+ xhci-hcd
[ 1.858893] usb usb1: SerialNumber: 0000:00:14.0
[ 1.859021] hub 1-0:1.0: USB hub found
[ 1.859039] hub 1-0:1.0: 9 ports detected
[ 1.860250] ehci-pci: EHCI PCI platform driver
[ 1.862054] xhci_hcd 0000:00:14.0: xHCI Host Controller
[ 1.862058] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2
[ 1.862086] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
[ 1.862087] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.862088] usb usb2: Product: xHCI Host Controller
[ 1.862090] usb usb2: Manufacturer: Linux 3.19.0-rc2+ xhci-hcd
[ 1.862091] usb usb2: SerialNumber: 0000:00:14.0
[ 1.862676] hub 2-0:1.0: USB hub found
[ 1.862687] hub 2-0:1.0: 4 ports detected
[ 1.863682] ehci-pci 0000:00:1d.0: EHCI Host Controller
[ 1.863705] ehci-pci 0000:00:1d.0: new USB bus registered, assigned bus number 3
[ 1.863726] ehci-pci 0000:00:1d.0: debug port 2
[ 1.867617] ehci-pci 0000:00:1d.0: cache line size of 64 is not supported
[ 1.868137] ehci-pci 0000:00:1d.0: irq 23, io mem 0xf051d000
[ 1.869459] sdhci: Secure Digital Host Controller Interface driver
[ 1.869461] sdhci: Copyright(c) Pierre Ossman
[ 1.879782] ehci-pci 0000:00:1d.0: USB 2.0 started, EHCI 1.00
[ 1.879844] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.879847] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.879849] usb usb3: Product: EHCI Host Controller
[ 1.879851] usb usb3: Manufacturer: Linux 3.19.0-rc2+ ehci_hcd
[ 1.879852] usb usb3: SerialNumber: 0000:00:1d.0
[ 1.879991] hub 3-0:1.0: USB hub found
[ 1.879999] hub 3-0:1.0: 2 ports detected
[ 1.882460] thermal LNXTHERM:00: registered as thermal_zone0
[ 1.882463] ACPI: Thermal Zone [TZ00] (28 C)
[ 1.882602] thermal LNXTHERM:01: registered as thermal_zone1
[ 1.882604] ACPI: Thermal Zone [TZ01] (30 C)
[ 1.886544] ACPI Warning: SystemIO range 0x000000000000efa0-0x000000000000efbf conflicts with OpRegion 0x000000000000efa0-0x000000000000efaf (\_SB_.PCI0.SBUS.SMBI) (20141107/utaddress-258)
[ 1.886551] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 1.891532] cfg80211: Calling CRDA to update world regulatory domain
[ 1.891575] sd 2:0:0:0: Attached scsi generic sg0 type 0
[ 1.893732] Intel(R) Wireless WiFi driver for Linux, in-tree:
[ 1.893735] Copyright(c) 2003- 2014 Intel Corporation
[ 1.896681] sound hdaudioC1D0: autoconfig: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
[ 1.896684] sound hdaudioC1D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 1.896685] sound hdaudioC1D0: hp_outs=1 (0x15/0x0/0x0/0x0/0x0)
[ 1.896686] sound hdaudioC1D0: mono: mono_out=0x0
[ 1.896687] sound hdaudioC1D0: inputs:
[ 1.896688] sound hdaudioC1D0: Headphone Mic=0x19
[ 1.896690] sound hdaudioC1D0: Headset Mic=0x1b
[ 1.896691] sound hdaudioC1D0: Internal Mic=0x12
[ 1.898137] iwlwifi 0000:02:00.0: loaded firmware version 23.11.10.0 op_mode iwlmvm
[ 1.901886] dcdbas dcdbas: Dell Systems Management Base Driver (version 5.6.0-3.2)
[ 1.907215] input: HDA Intel HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card0/input8
[ 1.907271] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input9
[ 1.907316] input: HDA Intel HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/sound/card0/input10
[ 1.914437] iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144
[ 1.914508] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
[ 1.914730] iwlwifi 0000:02:00.0: RF_KILL bit toggled to disable radio.
[ 1.914763] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
[ 1.914844] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/sound/card1/hdaudioC1D0/input7
[ 1.915040] input: HDA Intel PCH Headphone Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input11
[ 1.920817] AVX2 version of gcm_enc/dec engaged.
[ 1.920820] AES CTR mode by8 optimization enabled
[ 1.922056] EXT4-fs (sda6): re-mounted. Opts: errors=remount-ro
[ 1.928751] alg: No test for __gcm-aes-aesni (__driver-gcm-aes-aesni)
[ 1.935663] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 1.941447] alg: No test for crc32 (crc32-pclmul)
[ 1.964082] intel_rapl: Found RAPL domain package
[ 1.964086] intel_rapl: Found RAPL domain core
[ 1.964089] intel_rapl: Found RAPL domain uncore
[ 1.964091] intel_rapl: Found RAPL domain dram
[ 1.965082] Adding 8388604k swap on /dev/sda3. Priority:-1 extents:1 across:8388604k SSFS
[ 1.968187] iTCO_vendor_support: vendor-support=0
[ 1.968770] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
[ 1.968808] iTCO_wdt: Found a Lynx Point_LP TCO device (Version=2, TCOBASE=0x1860)
[ 1.969757] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
[ 2.017902] cfg80211: World regulatory domain updated:
[ 2.017906] cfg80211: DFS Master region: unset
[ 2.017908] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 2.017910] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 2.017912] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 2.017913] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[ 2.017915] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[ 2.017917] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[ 2.017919] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[ 2.017921] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[ 2.017922] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[ 2.039942] FAT-fs (sda1): utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive!
[ 2.048269] systemd-journald[101]: Received request to flush runtime journal from PID 1
[ 2.067942] ACPI: AC Adapter [ADP0] (on-line)
[ 2.077475] ACPI: Battery Slot [BAT0] (battery present)
[ 2.077699] wmi: Mapper loaded
[ 2.172057] usb 1-3: new full-speed USB device number 2 using xhci_hcd
[ 2.173991] input: Dell WMI hotkeys as /devices/virtual/input/input12
[ 2.192006] usb 3-1: new high-speed USB device number 2 using ehci-pci
[ 2.260230] Switched to clocksource tsc
[ 2.301869] usb 1-3: New USB device found, idVendor=06cb, idProduct=0af8
[ 2.301873] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 2.301875] usb 1-3: Product: Synaptics Large Touch Screen
[ 2.301877] usb 1-3: Manufacturer: SYNAPTICS
[ 2.324643] usb 3-1: New USB device found, idVendor=8087, idProduct=8000
[ 2.324647] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 2.324987] hub 3-1:1.0: USB hub found
[ 2.325053] hub 3-1:1.0: 8 ports detected
[ 2.468280] usb 1-5: new high-speed USB device number 3 using xhci_hcd
[ 2.621983] usb 1-5: New USB device found, idVendor=0bda, idProduct=5752
[ 2.621987] usb 1-5: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[ 2.621989] usb 1-5: Product: Integrated_Webcam_HD
[ 2.621990] usb 1-5: Manufacturer: CN0Y2TKG724873B4D4HXA00
[ 2.621992] usb 1-5: SerialNumber: 200901010001
[ 2.634813] hidraw: raw HID events driver (C) Jiri Kosina
[ 2.636134] media: Linux media interface: v0.10
[ 2.637128] usbcore: registered new interface driver usbhid
[ 2.637130] usbhid: USB HID core driver
[ 2.638588] Linux video capture interface: v2.00
[ 2.639094] input: SYNAPTICS Synaptics Large Touch Screen as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/0003:06CB:0AF8.0001/input/input13
[ 2.639228] hid-multitouch 0003:06CB:0AF8.0001: input,hiddev0,hidraw0: USB HID v1.11 Mouse [SYNAPTICS Synaptics Large Touch Screen] on usb-0000:00:14.0-3/input0
[ 2.642018] uvcvideo: Found UVC 1.00 device Integrated_Webcam_HD (0bda:5752)
[ 2.645537] input: Integrated_Webcam_HD as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input15
[ 2.645619] usbcore: registered new interface driver uvcvideo
[ 2.645622] USB Video Class driver (1.1.1)
[ 3.137679] RPC: Registered named UNIX socket transport module.
[ 3.137682] RPC: Registered udp transport module.
[ 3.137683] RPC: Registered tcp transport module.
[ 3.137684] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 3.140387] FS-Cache: Loaded
[ 3.146236] FS-Cache: Netfs 'nfs' registered for caching
[ 3.152280] Installing knfsd (copyright (C) 1996 ***@monad.swb.de).
[ 3.311354] vboxdrv: Found 4 processor cores.
[ 3.312413] vboxdrv: fAsync=0 offMin=0x10b offMax=0x1383
[ 3.312475] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'.
[ 3.312477] vboxdrv: Successfully loaded version 4.3.20_Debian (interface 0x001a0008).
[ 3.328870] vboxpci: pci-stub module not available, cannot detach PCI devices
[ 3.328873] vboxpci: IOMMU not found (not registered)
[ 3.380056] Bluetooth: Core ver 2.20
[ 3.380069] NET: Registered protocol family 31
[ 3.380071] Bluetooth: HCI device and connection manager initialized
[ 3.380074] Bluetooth: HCI socket layer initialized
[ 3.380077] Bluetooth: L2CAP socket layer initialized
[ 3.380082] Bluetooth: SCO socket layer initialized
[ 3.407658] hid-rmi 0018:06CB:2734.0002: Scanning PDT...
[ 3.411236] hid-rmi 0018:06CB:2734.0002: Found F34 on page 0x00
[ 3.413663] random: nonblocking pool is initialized
[ 3.414483] hid-rmi 0018:06CB:2734.0002: Found F01 on page 0x00
[ 3.419042] hid-rmi 0018:06CB:2734.0002: Found F11 on page 0x00
[ 3.426669] hid-rmi 0018:06CB:2734.0002: Found F54 on page 0x01
[ 3.429673] hid-rmi 0018:06CB:2734.0002: Found F30 on page 0x01
[ 3.441014] hid-rmi 0018:06CB:2734.0002: Found F55 on page 0x02
[ 3.453514] hid-rmi 0018:06CB:2734.0002: Found F51 on page 0x03
[ 3.461084] hid-rmi 0018:06CB:2734.0002: rmi_scan_pdt: Done with PDT scan.
[ 3.469333] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 3.469337] Bluetooth: BNEP filters: protocol multicast
[ 3.469341] Bluetooth: BNEP socket layer initialized
[ 3.479077] hid-rmi 0018:06CB:2734.0002: rmi_populate_f11: size in mm: 97 x 59
[ 3.493817] input: DLL060A:00 06CB:2734 as /devices/pci0000:00/INT33C3:00/i2c-8/i2c-DLL060A:00/0018:06CB:2734.0002/input/input16
[ 3.493945] hid-rmi 0018:06CB:2734.0002: input,hidraw1: <UNKNOWN> HID v1.00 Pointer [DLL060A:00 06CB:2734] on
[ 74.955130] setting min_power
[ 84.073694] ahci 0000:00:1f.2: port does not support device sleep
[ 106.540094] setting max_performance
[ 106.559201] ahci 0000:00:1f.2: port does not support device sleep
[ 106.567268] ata3.00: exception Emask 0x10 SAct 0x400 SErr 0x50000 action 0xe frozen
[ 106.567272] ata3.00: irq_stat 0x00400000, PHY RDY changed
[ 106.567275] ata3: SError: { PHYRdyChg CommWake }
[ 106.567278] ata3.00: failed command: READ FPDMA QUEUED
[ 106.567282] ata3.00: cmd 60/08:50:98:2a:08/00:00:1c:00:00/40 tag 10 ncq 4096 in
res 40/00:54:98:2a:08/00:00:1c:00:00/40 Emask 0x10 (ATA bus error)
[ 106.567285] ata3.00: status: { DRDY }
[ 106.567288] ata3: hard resetting link
[ 107.291770] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 107.294604] ata3.00: configured for UDMA/133
[ 107.307771] ahci 0000:00:1f.2: port does not support device sleep
[ 107.307782] ata3: EH complete
[ 132.128168] setting min_power
[ 132.128224] ahci 0000:00:1f.2: port does not support device sleep
[ 143.778885] setting max_performance
[ 143.796864] ahci 0000:00:1f.2: port does not support device sleep
[ 147.007445] ata3.00: exception Emask 0x10 SAct 0x18000000 SErr 0x50000 action 0xe frozen
[ 147.007449] ata3.00: irq_stat 0x00400000, PHY RDY changed
[ 147.007452] ata3: SError: { PHYRdyChg CommWake }
[ 147.007455] ata3.00: failed command: READ FPDMA QUEUED
[ 147.007459] ata3.00: cmd 60/08:d8:78:28:c7/00:00:17:00:00/40 tag 27 ncq 4096 in
res 40/00:e4:e0:06:d4/00:00:17:00:00/40 Emask 0x10 (ATA bus error)
[ 147.007461] ata3.00: status: { DRDY }
[ 147.007462] ata3.00: failed command: WRITE FPDMA QUEUED
[ 147.007466] ata3.00: cmd 61/20:e0:e0:06:d4/01:00:17:00:00/40 tag 28 ncq 147456 out
res 40/00:e4:e0:06:d4/00:00:17:00:00/40 Emask 0x10 (ATA bus error)
[ 147.007467] ata3.00: status: { DRDY }
[ 147.007470] ata3: hard resetting link
[ 147.732032] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 147.734934] ata3.00: configured for UDMA/133
[ 147.748034] ahci 0000:00:1f.2: port does not support device sleep
[ 147.748048] ata3: EH complete
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[Gabriele Mazzotta]

Post by Tejun Heo
It's not normal. It definitely doesn't happen with all devices. I
guess it could be a quirk from the device side. What's on the other
side of the connector? Can you post the full kernel log after such
incidence?

What happens if you comment out the DIPM part of ata_eh_set_lpm() -
the first ata_for_each_dev() loop in the function?

I commented the first loop and something seems to have changed.
I was able to get back to max_performance with no errors once, but
most of the times I get errors.
The last policy change here below went fine for instance:

[ 32.368603] setting min_power
[ 32.368670] ahci 0000:00:1f.2: port does not support device sleep
[ 38.550840] setting max_performance
[ 38.564932] ahci 0000:00:1f.2: port does not support device sleep
[ 38.579716] ata3: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0xe frozen
[ 38.579722] ata3: irq_stat 0x00400000, PHY RDY changed
[ 38.579726] ata3: SError: { PHYRdyChg CommWake }
[ 38.579731] ata3: hard resetting link
[ 39.301543] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 39.304783] ata3.00: configured for UDMA/133
[ 39.317499] ahci 0000:00:1f.2: port does not support device sleep
[ 39.317509] ata3: EH complete
[ 46.412652] setting min_power
[ 46.412769] ahci 0000:00:1f.2: port does not support device sleep
[ 53.869869] setting max_performance
[ 53.885083] ahci 0000:00:1f.2: port does not support device sleep
[ 53.898857] ata3: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0xe frozen
[ 53.898865] ata3: irq_stat 0x00400000, PHY RDY changed
[ 53.898870] ata3: SError: { PHYRdyChg CommWake }
[ 53.898877] ata3: hard resetting link
[ 54.621720] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 54.624864] ata3.00: configured for UDMA/133
[ 54.637674] ahci 0000:00:1f.2: port does not support device sleep
[ 54.637680] ata3: EH complete
[ 58.837307] setting min_power
[ 58.837427] ahci 0000:00:1f.2: port does not support device sleep
[ 63.269078] setting max_performance
[ 63.284571] ahci 0000:00:1f.2: port does not support device sleep
[ 63.297954] ata3: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0xe frozen
[ 63.297958] ata3: irq_stat 0x00400000, PHY RDY changed
[ 63.297961] ata3: SError: { PHYRdyChg CommWake }
[ 63.297966] ata3: hard resetting link
[ 64.021185] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 64.024291] ata3.00: configured for UDMA/133
[ 64.037206] ahci 0000:00:1f.2: port does not support device sleep
[ 64.037214] ata3: EH complete
[ 69.282264] setting min_power
[ 69.282320] ahci 0000:00:1f.2: port does not support device sleep
[ 74.933589] setting max_performance
[ 74.945847] ahci 0000:00:1f.2: port does not support device sleep
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[Tejun Heo]

Hello,

What you're experiencing looks like the ssd behaving badly after link
state transition. I wonder whether the right solution is plugging
PHYRDY IRQ for a while after LPM state change. Does the following
path make any difference?

Thanks.

diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 97683e4..684f45d 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -735,8 +735,8 @@ static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
sata_link_scr_lpm(link, policy, false);

/* turn PHYRDY IRQ back on */
- pp->intr_mask |= PORT_IRQ_PHYRDY;
- writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
+ //pp->intr_mask |= PORT_IRQ_PHYRDY;
+ //writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
}

return 0;

[Gabriele Mazzotta]

Post by Tejun Heo
Hello,
What you're experiencing looks like the ssd behaving badly after link
state transition. I wonder whether the right solution is plugging
PHYRDY IRQ for a while after LPM state change. Does the following
path make any difference?
Thanks.
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 97683e4..684f45d 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -735,8 +735,8 @@ static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
sata_link_scr_lpm(link, policy, false);
/* turn PHYRDY IRQ back on */
- pp->intr_mask |= PORT_IRQ_PHYRDY;
- writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
+ //pp->intr_mask |= PORT_IRQ_PHYRDY;
+ //writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
}
return 0;

Hi,

I tried it and got the same result:

[ 451.077463] ahci 0000:00:1f.2: port does not support device sleep
[ 452.162451] ata3.00: exception Emask 0x10 SAct 0x400 SErr 0x50000 action 0xe frozen
[ 452.162461] ata3.00: irq_stat 0x00400008, PHY RDY changed
[ 452.162467] ata3: SError: { PHYRdyChg CommWake }
[ 452.162473] ata3.00: failed command: WRITE FPDMA QUEUED
[ 452.162484] ata3.00: cmd 61/58:50:98:7c:4b/00:00:17:00:00/40 tag 10 ncq 45056 out
res 40/00:54:98:7c:4b/00:00:17:00:00/40 Emask 0x10 (ATA bus error)
[ 452.162489] ata3.00: status: { DRDY }
[ 452.162497] ata3: hard resetting link
[ 452.886958] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 452.890384] ata3.00: configured for UDMA/133
[ 452.902976] ahci 0000:00:1f.2: port does not support device sleep
[ 452.903002] ata3: EH complete

Gabriele
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[Tejun Heo]

Hello, Gabriele.

Post by Gabriele Mazzotta
[ 451.077463] ahci 0000:00:1f.2: port does not support device sleep
[ 452.162451] ata3.00: exception Emask 0x10 SAct 0x400 SErr 0x50000 action 0xe frozen
[ 452.162461] ata3.00: irq_stat 0x00400008, PHY RDY changed
[ 452.162467] ata3: SError: { PHYRdyChg CommWake }
[ 452.162473] ata3.00: failed command: WRITE FPDMA QUEUED
[ 452.162484] ata3.00: cmd 61/58:50:98:7c:4b/00:00:17:00:00/40 tag 10 ncq 45056 out
res 40/00:54:98:7c:4b/00:00:17:00:00/40 Emask 0x10 (ATA bus error)
[ 452.162489] ata3.00: status: { DRDY }
[ 452.162497] ata3: hard resetting link
[ 452.886958] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 452.890384] ata3.00: configured for UDMA/133
[ 452.902976] ahci 0000:00:1f.2: port does not support device sleep
[ 452.903002] ata3: EH complete

Hah, that's weird. Can you please double check that you're actually
running the patched kernel by throwing in a printk around the
commented out section? If leaving phy irqs turned off doesn't make
the problem go away, I'm not sure there's much we can do. Hmmm... one
option could be holding off speed-down verdict after LPM state
transition, but it looks like the ssd in question is misbehaving
pretty badly.

Thanks.

[Gabriele Mazzotta]

Post by Tejun Heo
Hello, Gabriele.

Post by Gabriele Mazzotta
[ 451.077463] ahci 0000:00:1f.2: port does not support device sleep
[ 452.162451] ata3.00: exception Emask 0x10 SAct 0x400 SErr 0x50000 action 0xe frozen
[ 452.162461] ata3.00: irq_stat 0x00400008, PHY RDY changed
[ 452.162467] ata3: SError: { PHYRdyChg CommWake }
[ 452.162473] ata3.00: failed command: WRITE FPDMA QUEUED
[ 452.162484] ata3.00: cmd 61/58:50:98:7c:4b/00:00:17:00:00/40 tag 10 ncq 45056 out
res 40/00:54:98:7c:4b/00:00:17:00:00/40 Emask 0x10 (ATA bus error)
[ 452.162489] ata3.00: status: { DRDY }
[ 452.162497] ata3: hard resetting link
[ 452.886958] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 452.890384] ata3.00: configured for UDMA/133
[ 452.902976] ahci 0000:00:1f.2: port does not support device sleep
[ 452.903002] ata3: EH complete

Hah, that's weird. Can you please double check that you're actually
running the patched kernel by throwing in a printk around the
commented out section? If leaving phy irqs turned off doesn't make
the problem go away, I'm not sure there's much we can do. Hmmm... one
option could be holding off speed-down verdict after LPM state
transition, but it looks like the ssd in question is misbehaving
pretty badly.
Thanks.

Done:

[ 168.515793] ahci 0000:00:1f.2: port does not support device sleep
[ 168.515800] Skip turn PHYRDY IRQ back on
[ 168.515802] turn PHYRDY IRQ back on skipped
[ 168.523793] ata3.00: exception Emask 0x10 SAct 0x40 SErr 0x50000 action 0xe frozen
[ 168.523798] ata3.00: irq_stat 0x00400008, PHY RDY changed
[ 168.523801] ata3: SError: { PHYRdyChg CommWake }
[ 168.523805] ata3.00: failed command: WRITE FPDMA QUEUED
[ 168.523811] ata3.00: cmd 61/28:30:68:60:4b/00:00:17:00:00/40 tag 6 ncq 20480 out
res 40/00:34:68:60:4b/00:00:17:00:00/40 Emask 0x10 (ATA bus error)
[ 168.523814] ata3.00: status: { DRDY }
[ 168.523819] ata3: hard resetting link
[ 169.248384] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 169.251661] ata3.00: configured for UDMA/133
[ 169.264293] ahci 0000:00:1f.2: port does not support device sleep
[ 169.264299] Skip turn PHYRDY IRQ back on
[ 169.264301] turn PHYRDY IRQ back on skipped
[ 169.264315] ata3: EH complete
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[Suman Tripathi]

Can you dump the ata_id parameters(LPM section) from the drive and we
can check the related LPM parameters of the drive ?

Post by Gabriele Mazzotta
Hi,
I'm having some problems with the link_power_management_policy on my
Dell XPS13 9333.
Changing policy from min_power or medium_power to max_performance
[ 3955.667086] ahci 0000:00:1f.2: port does not support device sleep
[ 3958.257106] ata3.00: exception Emask 0x10 SAct 0x40 SErr 0x50000 action 0xe frozen
[ 3958.257110] ata3.00: irq_stat 0x00400000, PHY RDY changed
[ 3958.257113] ata3: SError: { PHYRdyChg CommWake }
[ 3958.257116] ata3.00: failed command: READ FPDMA QUEUED
[ 3958.257120] ata3.00: cmd 60/00:30:c8:60:10/01:00:1d:00:00/40 tag 6 ncq 131072 in
res 40/00:34:c8:60:10/00:00:1d:00:00/40 Emask 0x10 (ATA bus error)
[ 3958.257122] ata3.00: status: { DRDY }
[ 3958.257126] ata3: hard resetting link
[ 3958.981727] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3958.984994] ata3.00: configured for UDMA/133
[ 3958.997686] ahci 0000:00:1f.2: port does not support device sleep
[ 3958.997698] ata3: EH complete
Sometimes I get "failed command: WRITE FPDMA QUEUED" multiple times.
As far as I know, this had always happened and it was confirmed
by another user. I've also come across some logs of the same system
and saw the same errors here and there, so it shouldn't be a problem
of my laptop in particular.
What I find interesting is that transitions from min_power to
medium_power and vice versa do not cause these errors. There are only
problem switching from min_power and medium_power to max_performance.
Doing the opposite, i.e. from max_performance to min_power or
medium_power, seems to work fine.
As a consequence of these continuous errors, the speed is reduced
from 6.0 Gbps to 1.5 Gbps.
I'd prefer not to disable LPM as it saves a considerable amount of
power when I'm using the battery. For this reason I'm currently using
medium_power and min_power only to prevent errors.
Is it normal that these errors appears only when I switch to
max_performance? Was something similar observed on other systems?
Can you dump the ata_id parameters(LPM section) from the drive and we can
check the related LPM parameters of the drive ?
Thanks,
Gabriele
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Post by Gabriele Mazzotta
Hi,
I'm having some problems with the link_power_management_policy on my
Dell XPS13 9333.
Changing policy from min_power or medium_power to max_performance
[ 3955.667086] ahci 0000:00:1f.2: port does not support device sleep
[ 3958.257106] ata3.00: exception Emask 0x10 SAct 0x40 SErr 0x50000 action 0xe frozen
[ 3958.257110] ata3.00: irq_stat 0x00400000, PHY RDY changed
[ 3958.257113] ata3: SError: { PHYRdyChg CommWake }
[ 3958.257116] ata3.00: failed command: READ FPDMA QUEUED
[ 3958.257120] ata3.00: cmd 60/00:30:c8:60:10/01:00:1d:00:00/40 tag 6 ncq 131072 in
res 40/00:34:c8:60:10/00:00:1d:00:00/40 Emask 0x10 (ATA bus error)
[ 3958.257122] ata3.00: status: { DRDY }
[ 3958.257126] ata3: hard resetting link
[ 3958.981727] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3958.984994] ata3.00: configured for UDMA/133
[ 3958.997686] ahci 0000:00:1f.2: port does not support device sleep
[ 3958.997698] ata3: EH complete
Sometimes I get "failed command: WRITE FPDMA QUEUED" multiple times.
As far as I know, this had always happened and it was confirmed
by another user. I've also come across some logs of the same system
and saw the same errors here and there, so it shouldn't be a problem
of my laptop in particular.
What I find interesting is that transitions from min_power to
medium_power and vice versa do not cause these errors. There are only
problem switching from min_power and medium_power to max_performance.
Doing the opposite, i.e. from max_performance to min_power or
medium_power, seems to work fine.
As a consequence of these continuous errors, the speed is reduced
from 6.0 Gbps to 1.5 Gbps.
I'd prefer not to disable LPM as it saves a considerable amount of
power when I'm using the battery. For this reason I'm currently using
medium_power and min_power only to prevent errors.
Is it normal that these errors appears only when I switch to
max_performance? Was something similar observed on other systems?
Thanks,
Gabriele
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Thanks,
with regards,
Suman Tripathi

[Gabriele Mazzotta]

Post by Suman Tripathi
Can you dump the ata_id parameters(LPM section) from the drive and we
can check the related LPM parameters of the drive ?

Hi,

I'm sorry, but I'm not really familiar with ata, could you be a bit
more specific about what you'd like to see?

Thanks,
Gabriele
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[Gabriele Mazzotta]

Post by Gabriele Mazzotta

Post by Suman Tripathi
Can you dump the ata_id parameters(LPM section) from the drive and we
can check the related LPM parameters of the drive ?

Hi,
I'm sorry, but I'm not really familiar with ata, could you be a bit
more specific about what you'd like to see?
ok no issues. First can show the log from the point the drive got
ata2.00: ATA-8: WDC WD5000AAKX-08U6AA0, 19.01H19, max UDMA/100
ata2.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata2.00: configured for UDMA/100
I would like to the ATA version the drive is complaint. In the above case
it is ATA-8

[ 0.698842] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 0.701419] ata3.00: ATA-8: LITEONIT LMT-256M6M mSATA 256GB, DM8110F, max UDMA/133
[ 0.701421] ata3.00: 500118192 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[ 0.701982] ata3.00: configured for UDMA/133

You can see the entire log here:
http://www.spinics.net/lists/linux-ide/msg50069.html

Post by Gabriele Mazzotta
Thanks,
Gabriele

Post by Suman Tripathi

Post by Suman Tripathi
Can you dump the ata_id parameters(LPM section) from the drive and we
can check the related LPM parameters of the drive ?

Hi,
I'm sorry, but I'm not really familiar with ata, could you be a bit
more specific about what you'd like to see?
Thanks,
Gabriele

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[Gabriele Mazzotta]

Post by Gabriele Mazzotta
Hi,

Post by Gabriele Mazzotta

Post by Suman Tripathi
Can you dump the ata_id parameters(LPM section) from the drive and we
can check the related LPM parameters of the drive ?

Hi,
I'm sorry, but I'm not really familiar with ata, could you be a bit
more specific about what you'd like to see?
ok no issues. First can show the log from the point the drive got
ata2.00: ATA-8: WDC WD5000AAKX-08U6AA0, 19.01H19, max UDMA/100
ata2.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata2.00: configured for UDMA/100
I would like to the ATA version the drive is complaint. In the above case
it is ATA-8

[ 0.698842] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 0.701419] ata3.00: ATA-8: LITEONIT LMT-256M6M mSATA 256GB, DM8110F, max UDMA/133
[ 0.701421] ata3.00: 500118192 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[ 0.701982] ata3.00: configured for UDMA/133
http://www.spinics.net/lists/linux-ide/msg50069.html
Can you try the below fix ? In the libata-core.c

Tried, unfortunately it does not solve the problem. I no longer get
"ahci 0000:00:1f.2: port does not support device sleep"

[ 60.170199] ata3.00: exception Emask 0x10 SAct 0x2000 SErr 0x50000 action 0xe frozen
[ 60.170209] ata3.00: irq_stat 0x00400000, PHY RDY changed
[ 60.170215] ata3: SError: { PHYRdyChg CommWake }
[ 60.170221] ata3.00: failed command: WRITE FPDMA QUEUED
[ 60.170231] ata3.00: cmd 61/01:68:01:08:00/00:00:00:00:00/40 tag 13 ncq 512 out
res 40/00:6c:01:08:00/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
[ 60.170236] ata3.00: status: { DRDY }
[ 60.170244] ata3: hard resetting link
[ 60.894728] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 60.897672] ata3.00: configured for UDMA/133
[ 60.910690] ata3: EH complete
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[Gabriele Mazzotta]

I just tried the following and I no longer get errors:

diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 97683e4..c815b31 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1708,10 +1708,10 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
status &= ~PORT_IRQ_BAD_PMP;

/* if LPM is enabled, PHYRDY doesn't mean anything */
- if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) {
+// if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) {
status &= ~PORT_IRQ_PHYRDY;
ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
- }
+// }

if (unlikely(status & PORT_IRQ_ERROR)) {
ahci_error_intr(ap, status);


I haven't read the specification, so this might be bad. I did this in
base of some consideration I made that, as far as I know, could be
completely wrong. I hope you can get something meaningful out of this.

Gabriele
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[Gabriele Mazzotta]

Hi,

It seems that the following patch prevents errors when the policy is
changed. Could anybody explain why?

Thanks,
Gabriele

diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 61a9c07..38d39f7 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1708,7 +1708,10 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
status &= ~PORT_IRQ_BAD_PMP;

/* if LPM is enabled, PHYRDY doesn't mean anything */
- if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) {
+ if (ap->link.lpm_policy > ATA_LPM_MAX_POWER ||
+ ap->link.flags & ATA_LFLAG_CHANGED) {
+ if (ap->link.flags & ATA_LFLAG_CHANGED)
+ ap->link.flags &= ~ATA_LFLAG_CHANGED;
status &= ~PORT_IRQ_PHYRDY;
ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
}
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index d2029a4..e8f965c 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -3489,6 +3489,8 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
}
}

+ link->flags |= ATA_LFLAG_CHANGED;
+
return 0;

fail:
diff --git a/include/linux/libata.h b/include/linux/libata.h
index fc03efa..5abf5f2 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -205,6 +205,7 @@ enum {
ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
+ ATA_LFLAG_CHANGED = (1 << 10),

/* struct ata_port flags */
ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
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[Gabriele Mazzotta]

Post by Gabriele Mazzotta
Hi,
It seems that the following patch prevents errors when the policy is
changed. Could anybody explain why?
Thanks,
Gabriele
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 61a9c07..38d39f7 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1708,7 +1708,10 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
status &= ~PORT_IRQ_BAD_PMP;
/* if LPM is enabled, PHYRDY doesn't mean anything */
- if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) {
+ if (ap->link.lpm_policy > ATA_LPM_MAX_POWER ||
+ ap->link.flags & ATA_LFLAG_CHANGED) {
+ if (ap->link.flags & ATA_LFLAG_CHANGED)
+ ap->link.flags &= ~ATA_LFLAG_CHANGED;
status &= ~PORT_IRQ_PHYRDY;
ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
}
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index d2029a4..e8f965c 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -3489,6 +3489,8 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
}
}
+ link->flags |= ATA_LFLAG_CHANGED;
+
return 0;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index fc03efa..5abf5f2 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -205,6 +205,7 @@ enum {
ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
+ ATA_LFLAG_CHANGED = (1 << 10),
/* struct ata_port flags */
ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */

Hi,

did anyone looked at the above change?

Thanks,
Gabriele
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[Tejun Heo]

Post by Gabriele Mazzotta
It seems that the following patch prevents errors when the policy is
changed. Could anybody explain why?

The device is generating a spurious PHY event after LPM state change
and the patch is ignoring the event once after state change. It's a
bit too specific. Maybe we should do this timeout-based - e.g. ignore
phy events for 1s after LPM state change. Gabriele, would be
interested in making such changes?

Thanks.

[Gabriele Mazzotta]

Post by Tejun Heo

Post by Gabriele Mazzotta
It seems that the following patch prevents errors when the policy is
changed. Could anybody explain why?

The device is generating a spurious PHY event after LPM state change
and the patch is ignoring the event once after state change. It's a
bit too specific. Maybe we should do this timeout-based - e.g. ignore
phy events for 1s after LPM state change. Gabriele, would be
interested in making such changes?

Thanks for the explanation and yes, I am interested.

Doing some quick tests I found that in some cases it takes 5 or 6
seconds for the first interrupt to arrive, so I'd have to use a quite
long interval to completely prevent errors.

I am wondering if it would be better using my original solution
(i.e. ignore first event), but make it device specific given that it
might make no sense on other systems and seems to be more reliable than
the time-based one.

Gabriele
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[Tejun Heo]

Hello,

Post by Gabriele Mazzotta
Doing some quick tests I found that in some cases it takes 5 or 6
seconds for the first interrupt to arrive, so I'd have to use a quite
long interval to completely prevent errors.

Hmm...

Post by Gabriele Mazzotta
I am wondering if it would be better using my original solution
(i.e. ignore first event), but make it device specific given that it
might make no sense on other systems and seems to be more reliable than
the time-based one.

I'm not sure. What if the extra PHY event isn't that reliable. It'd
be pretty confusing if it ends up ignoring a legitimate PHY event
after, say, two hours, so one way or the other, we'd need to cap how
long we're gonna be ignoring the event. Ignore the first PHY event
for 10s after LPM state change?

Thanks.

[Tejun Heo]

Hello, Gabriele.

I haven't considered that possibility. Something like the following then?

Yeah, looks great. Some minor comments below.

--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1700,6 +1700,8 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
struct ahci_port_priv *pp = ap->private_data;
struct ahci_host_priv *hpriv = ap->host->private_data;
int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
+ unsigned long lpm_timeout = ap->link.last_lpm_change + 10 * HZ;

We prolly want to define the timeout as a constant symbol in libata.h
and explain what this is about.

+ int ignore_event = 0;

Use bool?

@@ -1707,8 +1709,13 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
if (unlikely(resetting))
status &= ~PORT_IRQ_BAD_PMP;
+ if (time_before(jiffies, lpm_timeout) &&
+ (ap->link.flags & ATA_LFLAG_CHANGED))
+ ignore_event = 1;

Nothing major but testing LFLAG first would prolly be a better style
given that timeout value is relevant only while the flag is asserted
and some comment would be nice too.

@@ -788,6 +789,8 @@ struct ata_link {
struct ata_eh_context eh_context;
struct ata_device device[ATA_MAX_DEVICES];
+
+ unsigned long last_lpm_change;

A brief explanation would be nice.

Thanks.

[Gabriele Mazzotta]

When the LPM policy is set to ATA_LPM_MAX_POWER, the device might
generate a spurious PHY event that might cause errors on the link.
Ignore this event if it occurred within 10s after the policy change.

The timeout was chosen observing that on a Dell XPS13 9333 these
spurious events can occur up to roughly 6s after the policy change.

Signed-off-by: Gabriele Mazzotta <***@gmail.com>
---
drivers/ata/libahci.c | 13 ++++++++++++-
drivers/ata/libata-eh.c | 3 +++
include/linux/libata.h | 9 +++++++++
3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 61a9c07..59a2517 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1700,6 +1700,9 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
struct ahci_port_priv *pp = ap->private_data;
struct ahci_host_priv *hpriv = ap->host->private_data;
int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
+ unsigned long lpm_timeout = ap->link.last_lpm_change +
+ msecs_to_jiffies(ATA_TMOUT_SPURIOUS_PHY);
+ bool ignore_event = false;
u32 qc_active = 0;
int rc;

@@ -1707,8 +1710,16 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
if (unlikely(resetting))
status &= ~PORT_IRQ_BAD_PMP;

+ /* ignore the first PHY event after the LPM policy changed
+ * as it is might be spurious
+ */
+ if ((ap->link.flags & ATA_LFLAG_CHANGED) &&
+ time_before(jiffies, lpm_timeout))
+ ignore_event = true;
+
/* if LPM is enabled, PHYRDY doesn't mean anything */
- if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) {
+ if (ap->link.lpm_policy > ATA_LPM_MAX_POWER || ignore_event) {
+ ap->link.flags &= ~ATA_LFLAG_CHANGED;
status &= ~PORT_IRQ_PHYRDY;
ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
}
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 07f41be..cf0022e 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -3597,6 +3597,9 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
}
}

+ link->last_lpm_change = jiffies;
+ link->flags |= ATA_LFLAG_CHANGED;
+
return 0;

fail:
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 8dad4a3..05dbff3 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -205,6 +205,7 @@ enum {
ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
+ ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */

/* struct ata_port flags */
ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
@@ -309,6 +310,12 @@ enum {
*/
ATA_TMOUT_PMP_SRST_WAIT = 5000,

+ /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
+ * be a spurious PHY event, so ignore the first PHY event that
+ * occurs within 10s after the policy change.
+ */
+ ATA_TMOUT_SPURIOUS_PHY = 10000,
+
/* ATA bus states */
BUS_UNKNOWN = 0,
BUS_DMA = 1,
@@ -788,6 +795,8 @@ struct ata_link {
struct ata_eh_context eh_context;

struct ata_device device[ATA_MAX_DEVICES];
+
+ unsigned long last_lpm_change; /* when last LPM change happened */
};
#define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
#define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])

[Tejun Heo]

Post by Gabriele Mazzotta
When the LPM policy is set to ATA_LPM_MAX_POWER, the device might
generate a spurious PHY event that might cause errors on the link.
Ignore this event if it occurred within 10s after the policy change.
The timeout was chosen observing that on a Dell XPS13 9333 these
spurious events can occur up to roughly 6s after the policy change.

Just a couple things.

Can you please add the following tag?

Link: http://lkml.kernel.org/g/<MSG-ID of the first message in this thread>

Post by Gabriele Mazzotta
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 61a9c07..59a2517 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1700,6 +1700,9 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
struct ahci_port_priv *pp = ap->private_data;
struct ahci_host_priv *hpriv = ap->host->private_data;
int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
+ unsigned long lpm_timeout = ap->link.last_lpm_change +
+ msecs_to_jiffies(ATA_TMOUT_SPURIOUS_PHY);
+ bool ignore_event = false;
u32 qc_active = 0;
int rc;
@@ -1707,8 +1710,16 @@ static void ahci_handle_port_interrupt(struct ata_port *ap,
if (unlikely(resetting))
status &= ~PORT_IRQ_BAD_PMP;
+ /* ignore the first PHY event after the LPM policy changed
+ * as it is might be spurious
+ */
+ if ((ap->link.flags & ATA_LFLAG_CHANGED) &&
+ time_before(jiffies, lpm_timeout))
+ ignore_event = true;

Maybe the following is better?

ignore_event = (ap->link.flags & ATA_LFLAG_CHANGED) &&
time_before(jiffies, lpm_timeout);

Post by Gabriele Mazzotta
+
/* if LPM is enabled, PHYRDY doesn't mean anything */
- if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) {
+ if (ap->link.lpm_policy > ATA_LPM_MAX_POWER || ignore_event) {
+ ap->link.flags &= ~ATA_LFLAG_CHANGED;
status &= ~PORT_IRQ_PHYRDY;
ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
}

I thought more about it and it's weird to have ATA_LFLAG_CHANGED and
last_lpm_change timestamp in libata core side and then open-code the
actual logic in ahci. How about implementing a generic helper, say,
bool sata_lpm_ignore_phy_events(link) in libata core and use it in
specific drivers? It can test both the current lpm_policy and the
timeout (preferably a separate patch to introduce the function and
factor out lpm policy testing).

Thanks.

[Gabriele Mazzotta]

Post by Tejun Heo
I thought more about it and it's weird to have ATA_LFLAG_CHANGED and
last_lpm_change timestamp in libata core side and then open-code the
actual logic in ahci. How about implementing a generic helper, say,
bool sata_lpm_ignore_phy_events(link) in libata core and use it in
specific drivers? It can test both the current lpm_policy and the
timeout (preferably a separate patch to introduce the function and
factor out lpm policy testing).

I agree. I'm now going to send the revised patches, thanks for all
the suggestions.

Gabriele

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