I subscribed to this bug because I was seeing this hang too. It happened
randomly several times, without a specific cause or way to reproduce it.

This was around December, and it happened maybe 4-5 times along a month.
The GPU would hang with that error in dmesg, and everything continued to
work, though very slowly.

However, I must say that since then it didn't happen again for almost 2
months maybe. I use Arch Linux, which means I always update to the
latest stable packages of everything, so it seems that for me it got
solved at some point (or at least much harder to reproduce).

This is an Ironlake / HD 2000 based Dell laptop. I did update the BIOS
when I found this bug report, but it didn't solve the problem, the hang
happened after updating it.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1041790

Title:
  [sandybridge-m-gt2] GPU lockup  IPEHR: 0x0b160001 IPEHR: 0x0b140001

Status in X.org xf86-video-intel:
  Confirmed
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Triaged

Bug description:
  X locks up periodically for a 2 to ten seconds at a time and this
  crash log gets generated. It's significantly more than several times a
  day but not quite continuous.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.10
  Package: xserver-xorg-video-intel 2:2.20.3-0ubuntu1
  Uname: Linux 3.6.0-rc3-git-20120826.1015 x86_64
  ApportVersion: 2.5.1-0ubuntu2
  Architecture: amd64
  Chipset: sandybridge-m-gt2
  Date: Sun Aug 26 16:06:32 2012
  DistroCodename: quantal
  DistroVariant: ubuntu
  DuplicateSignature: [sandybridge-m-gt2] GPU lockup  IPEHR: 0x0b160001 IPEHR: 
0x0b140001 Ubuntu 12.10
  EcryptfsInUse: Yes
  ExecutablePath: /usr/share/apport/apport-gpu-error-intel.py
  GpuHangFrequency: Continuously
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120724.2)
  InterpreterPath: /usr/bin/python3.2mu
  MachineType: Dell Inc. Dell System XPS L502X
  ProcCmdline: /usr/bin/python3 /usr/share/apport/apport-gpu-error-intel.py
  ProcEnviron:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.6.0-rc3-git-20120826.1015 
root=UUID=135c8090-427c-460a-909d-eff262cd44b6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   xserver-xorg             1:7.7+1ubuntu3
   libdrm2                  2.4.38-0ubuntu2
   xserver-xorg-video-intel 2:2.20.3-0ubuntu1
  SourcePackage: xserver-xorg-video-intel
  Title: [sandybridge-m-gt2] GPU lockup  IPEHR: 0x0b160001 IPEHR: 0x0b140001
  UdevDb: Error: [Errno 2] No such file or directory: 'udevadm'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  dmi.bios.date: 05/29/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 0NJT03
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: 
dmi:bvnDellInc.:bvrA11:bd05/29/2012:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS L502X
  dmi.sys.vendor: Dell Inc.

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