** Description changed:
+ SRU Justification for pm-utils-powersave-policy:
+
+ Impact: On certain hardware, enabling power saving for the SATA link can
+ cause data corruption.
+
+ How Addressed: The proposed branch removes the sata link power policy
+ script. This will cause the link to be maintained at the normal power
+ usage instead of dropping when the power is removed from the machine.
+
+ Reproduction: On an affected machine, unplug and plug in the power a few
+ times. Data corruption will result.
+
+ Regression Potential: Removing the script will cause the SATA link to
+ stay fully powered at all times. This may cause an increase in the
+ battery usage for some machines. There should be no functionality
+ regressions or bugs introduced by this change.
+
+ =====
+
Using Lucid on my laptop, I see errors like this in dmesg quite
frequently (every few hours):
Mar 14 23:00:09 chris-laptop kernel: [42987.460608] ata1.00: exception Emask
0x10 SAct 0x1 SErr 0x50000 action 0xe frozen
Mar 14 23:00:09 chris-laptop kernel: [42987.460618] ata1.00: irq_stat
0x00400000, PHY RDY changed
Mar 14 23:00:09 chris-laptop kernel: [42987.460627] ata1: SError: { PHYRdyChg
CommWake }
Mar 14 23:00:09 chris-laptop kernel: [42987.460635] ata1.00: failed command:
READ FPDMA QUEUED
Mar 14 23:00:09 chris-laptop kernel: [42987.460649] ata1.00: cmd
60/08:00:97:23:44/00:00:01:00:00/40 tag 0 ncq 4096 in
Mar 14 23:00:09 chris-laptop kernel: [42987.460652] res
40/00:04:97:23:44/00:00:01:00:00/40 Emask 0x10 (ATA bus error)
Mar 14 23:00:09 chris-laptop kernel: [42987.460669] ata1.00: status: { DRDY }
Mar 14 23:00:09 chris-laptop kernel: [42987.460681] ata1: hard resetting link
Mar 14 23:00:09 chris-laptop kernel: [42987.523336] ata2: exception Emask
0x10 SAct 0x0 SErr 0x50000 action 0xe frozen
Mar 14 23:00:09 chris-laptop kernel: [42987.523346] ata2: irq_stat
0x00400000, PHY RDY changed
Mar 14 23:00:09 chris-laptop kernel: [42987.523355] ata2: SError: { PHYRdyChg
CommWake }
Mar 14 23:00:09 chris-laptop kernel: [42987.523368] ata2: hard resetting link
Mar 14 23:00:09 chris-laptop kernel: [42988.202586] ata1: SATA link up 3.0
Gbps (SStatus 123 SControl 300)
Mar 14 23:00:09 chris-laptop kernel: [42988.205443] ata1.00: configured for
UDMA/133
Mar 14 23:00:09 chris-laptop kernel: [42988.205459] ata1: EH complete
Mar 14 23:00:09 chris-laptop kernel: [42988.280089] ata2: SATA link up 1.5
Gbps (SStatus 113 SControl 300)
Mar 14 23:00:09 chris-laptop kernel: [42988.285567] ata2.00: configured for
UDMA/100
Mar 14 23:00:09 chris-laptop kernel: [42988.289370] ata2: EH complete
Every couple of days, this results in data corruption and my filesystem
being remounted read-only:
[ 6148.305806] Aborting journal on device sda1-8.
[ 6148.325011] EXT4-fs error (device sda1): ext4_journal_start_sb: Detected
aborted journal
[ 6148.325018] EXT4-fs (sda1): Remounting filesystem read-only
[ 6148.326702] journal commit I/O error
[ 6148.330975] EXT4-fs error (device sda1) in ext4_reserve_inode_write:
Journal has aborted
[ 6148.462572] __ratelimit: 15 callbacks suppressed
Those messages generally appear at the end of dmesg after the event,
just after the "hard resetting link" message. I then have to boot a live
CD and manually run fsck, as I can no longer boot the laptop.
This is happening every couple of days generally, although it happened 3
times in one day last Thursday.
I did contemplate it being a hardware issue, but I tried running the
kernel from Karmic for a couple of days, and that worked ok without a
single error message
ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: chr1s 4010 F.... pulseaudio
- /dev/snd/controlC1: chr1s 4010 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: chr1s 4010 F.... pulseaudio
+ /dev/snd/controlC1: chr1s 4010 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
- Card hw:0 'Intel'/'HDA Intel at 0xf6afc000 irq 21'
- Mixer name : 'Intel G45 DEVCTG'
- Components : 'HDA:111d76b2,10280263,00100302
HDA:80862802,80860101,00100000'
- Controls : 22
- Simple ctrls : 11
+ Card hw:0 'Intel'/'HDA Intel at 0xf6afc000 irq 21'
+ Mixer name : 'Intel G45 DEVCTG'
+ Components : 'HDA:111d76b2,10280263,00100302
HDA:80862802,80860101,00100000'
+ Controls : 22
+ Simple ctrls : 11
Card1.Amixer.info:
- Card hw:1 'U0x46d0x9a4'/'USB Device 0x46d:0x9a4 at usb-0000:00:1a.7-3.3,
high speed'
- Mixer name : 'USB Mixer'
- Components : 'USB046d:09a4'
- Controls : 2
- Simple ctrls : 1
+ Card hw:1 'U0x46d0x9a4'/'USB Device 0x46d:0x9a4 at usb-0000:00:1a.7-3.3,
high speed'
+ Mixer name : 'USB Mixer'
+ Components : 'USB046d:09a4'
+ Controls : 2
+ Simple ctrls : 1
Card1.Amixer.values:
- Simple mixer control 'Mic',0
- Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
- Capture channels: Mono
- Limits: Capture 0 - 14
- Mono: Capture 0 [0%] [23.75dB] [on]
+ Simple mixer control 'Mic',0
+ Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
+ Capture channels: Mono
+ Limits: Capture 0 - 14
+ Mono: Capture 0 [0%] [23.75dB] [on]
Date: Tue Mar 16 10:07:41 2010
DistroRelease: Ubuntu 10.04
Frequency: Once a day.
HibernationDevice: RESUME=UUID=762f3439-67ac-4828-aa94-caf2a2ba0f9a
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: Dell Inc. Latitude E5500
Package: linux-image-2.6.32-16-generic 2.6.32-16.25
PccardctlIdent:
- Socket 0:
- no product info available
+ Socket 0:
+ no product info available
PccardctlStatus:
- Socket 0:
- no card
+ Socket 0:
+ no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-16-generic
root=UUID=4ce5e12b-6e82-4fa4-90ff-7d9859d7504e ro quiet splash
ProcEnviron:
- LANG=en_GB.utf8
- SHELL=/bin/bash
+ LANG=en_GB.utf8
+ SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic
Regression: Yes
RelatedPackageVersions: linux-firmware 1.32
Reproducible: No
SourcePackage: linux
TestedUpstream: No
Uname: Linux 2.6.32-16-generic x86_64
dmi.bios.date: 11/05/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A15
dmi.board.name: 0DW635
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA15:bd11/05/2009:svnDellInc.:pnLatitudeE5500:pvr:rvnDellInc.:rn0DW635:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E5500
dmi.sys.vendor: Dell Inc.
--
SATA link power management causes disk errors and corruption
https://bugs.launchpad.net/bugs/539467
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