Public bug reported:

I started a game called QuantZ (commercial offering), which used to run
fine under eralier Ubuntu releases on the same machine. Now, it hangs
(also see #811640), and I had to hard-reset the machine. After
rebooting, apport popped up and informed me of a kernel bug.

ProblemType: KernelOops
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-5-generic 3.0.0-5.6
ProcVersionSignature: Ubuntu 3.0.0-5.6-generic 3.0.0-rc7
Uname: Linux 3.0.0-5-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
Annotation: Your system might become unstable now and might need to be 
restarted.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  hunzikea   1606 F.... pulseaudio
 /dev/snd/seq:        timidity   1442 F.... timidity
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf2620000 irq 47'
   Mixer name   : 'Conexant CX20585'
   Components   : 'HDA:14f15069,17aa2132,00100300'
   Controls      : 8
   Simple ctrls  : 5
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 
6HHT14WW-1.02'
   Mixer name   : 'ThinkPad EC 6HHT14WW-1.02'
   Components   : ''
   Controls      : 1
   Simple ctrls  : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Tue Jul 19 10:54:20 2011
Failure: oops
HibernationDevice: RESUME=UUID=5c178cca-7131-4da1-bbc3-6490c981c971
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: LENOVO 28239KG
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-5-generic 
root=UUID=7b361d96-9c1b-4168-b7b1-261e6bd2734d ro quiet splash vt.handoff=7
RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-1ubuntu12
SourcePackage: linux
StagingDrivers: mei
Title: kernel BUG at 
/build/buildd/linux-3.0.0/drivers/gpu/drm/i915/i915_gem.c:3337!
UpgradeStatus: Upgraded to oneiric on 2011-07-19 (0 days ago)
dmi.bios.date: 03/14/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 6HET35WW (1.20 )
dmi.board.name: 28239KG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: 
dmi:bvnLENOVO:bvr6HET35WW(1.20):bd03/14/2011:svnLENOVO:pn28239KG:pvrThinkPadT400s:rvnLENOVO:rn28239KG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 28239KG
dmi.product.version: ThinkPad T400s
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-kerneloops kernel-oops oneiric staging unity-2d

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https://bugs.launchpad.net/bugs/812765

Title:
  kernel BUG at
  /build/buildd/linux-3.0.0/drivers/gpu/drm/i915/i915_gem.c:3337!

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