System is freezing every 30 seconds, kern.log filled with EDID checksum errors

[Alexey Shumitsky]

Binary package hint: linux-image-2.6.38-8-generic

Every 30 seconds system freezes for a moment (image is not updating, mouse cursor etc, though applications work in background).
Kernel log is filled with messages like this:

Apr 6 23:52:37 A200 kernel: [ 8978.212646] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 148
Apr 6 23:52:37 A200 kernel: [ 8978.212652] [drm:drm_edid_block_valid] *ERROR* Raw EDID:
...
Again, repeating with a period of 30 seconds (with a time log grows very large which itself is a kind of a problem).

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.41
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: alexeys 1417 F.... pulseaudio
 /dev/snd/pcmC0D0p: alexeys 1417 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe400000 irq 49'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,1179ff02,00100003 HDA:11c11040,11790001,00100200'
   Controls : 13
   Simple ctrls : 8
CheckboxSubmission: 8ddd5011183dec03aaf21d82f9d91697
CheckboxSystem: f34168ef68e1eba7595045ec0471a028
Date: Wed Apr 6 23:42:27 2011
HibernationDevice: RESUME=UUID=c75d825c-b202-437a-b7c7-b883dbe91bf7
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta 1 amd64 (20110329.1)
MachineType: TOSHIBA Satellite A200
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=d7a76460-abb9-4c1a-a0aa-94cf603d50d3 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-8-generic N/A
 linux-backports-modules-2.6.38-8-generic N/A
 linux-firmware 1.49
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/09/2008
dmi.bios.vendor: TOSHIBA
dmi.bios.version: V2.00
dmi.board.name: ISKAA
dmi.board.vendor: TOSHIBA
dmi.board.version: 1.00
dmi.chassis.asset.tag: *
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnTOSHIBA:bvrV2.00:bd01/09/2008:svnTOSHIBA:pnSatelliteA200:pvrPSAE6E-0E9035CZ:rvnTOSHIBA:rnISKAA:rvr1.00:cvnTOSHIBA:ct10:cvrN/A:
dmi.product.name: Satellite A200
dmi.product.version: PSAE6E-0E9035CZ
dmi.sys.vendor: TOSHIBA

[penalvch (penalvch)]

Alexey Shumitsky, thank you for reporting this and helping make Ubuntu better. This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command in the development release from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux <replace-with-bug-number>

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text.

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.

Please let us know your results. Thanks in advance.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]