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[Lukas Hejmal <1082544@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 946899 ***
    https://bugs.launchpad.net/bugs/946899

Same error here on my business laptop:

Lenovo T420 - see lspci and lsusb in attachement.
Kernel: 3.8.0-27-generic #40-Ubuntu SMP Tue Jul 9 00:17:05 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

When this heppnes to me I found way how to get it again working without
any data loss: I press CTRL+ALT+F1 to get to console, where when I use
dmesg I get:

[ 3139.056647] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[ 3139.056652] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state

Then I press CTRL+ALT+F7 to get back to X11 console and screen is no
longer frozen and I can continue to work.

P.S.: /debug/dri/0/i915_error_state does not exist - /debug is not
found, but maybe it's my personal problem that I did not enabled
debugging at propper place.


** Attachment added: "lscpi + lsusb on impacted machine."
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1082544/+attachment/3763284/+files/lspci.txt

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https://bugs.launchpad.net/bugs/1082544

Title:
  8086:0116 [raring] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer
  elapsed... GPU hung

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  my system seems to be hanging more than usual today

  [ 8114.663134] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
  [ 8114.663140] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state

  
  Ubuntu 13.04 64bits on intel HD3000

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: unity 6.12.0-0ubuntu4
  ProcVersionSignature: Ubuntu 3.7.0-3.9-generic 3.7.0-rc6
  Uname: Linux 3.7.0-3-generic x86_64
  ApportVersion: 2.6.2-0ubuntu5
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,compiztoolbox,decor,workarounds,grid,vpswitch,snap,imgpng,resize,expo,place,gnomecompat,mousepoll,move,ezoom,unitymtgrabhandles,wall,session,fade,scale,unityshell]
  Date: Sat Nov 24 00:18:39 2012
  InstallationDate: Installed on 2012-06-10 (166 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120606.2)
  MarkForUpload: True
  SourcePackage: unity
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.6.2-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  fernando   2007 F.... pulseaudio
  DistroRelease: Ubuntu 13.04
  InstallationDate: Installed on 2012-06-10 (169 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120606.2)
  MachineType: Dell Inc. Vostro V131
  MarkForUpload: True
  Package: linux 3.7.0.3.7
  PackageArchitecture: amd64
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.7.0-3-generic root=UUID=c4fd53f4-edab-4eb7-9aac-e7eb10555ba6 ro quiet
  ProcVersionSignature: Ubuntu 3.7.0-3.9-generic 3.7.0-rc6
  RelatedPackageVersions:
   linux-restricted-modules-3.7.0-3-generic N/A
   linux-backports-modules-3.7.0-3-generic  N/A
   linux-firmware                           1.97
  Tags: third-party-packages raring running-unity
  Uname: Linux 3.7.0-3-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip disk lpadmin plugdev sambashare sudo vboxusers
  dmi.bios.date: 08/31/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A02
  dmi.board.name: 0P0TH6
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A02
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA02:bd08/31/2011:svnDellInc.:pnVostroV131:pvrNotSpecified:rvnDellInc.:rn0P0TH6:rvrA02:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Vostro V131
  dmi.product.version: Not Specified
  dmi.sys.vendor: Dell Inc.

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