Forwarding this bug from Ubuntu reporter mkis62: http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/714719 [Problem] GPU lockup (of the "Hangcheck timer elapsed" variety) on 2.6.38-2 kernel and 2.14.0 intel driver with i915gm hardware. No compositor is running. [Original Description] X crashed while setting preferences in Decibel Audio Player tty1-6 works ... rebooting... From GPU dump: ACTHD: 0xffffffff EIR: 0x00000000 EMR: 0xffffffed ESR: 0x00000001 PGTBL_ER: 0x00000000 IPEHR: 0x02000004 IPEIR: 0x00000000 INSTDONE: 0x03c7c081 busy: IDCT busy: IQ busy: PR busy: VLD busy: Instruction parser busy: Windowizer busy: Intermediate Z busy: Perspective interpolation busy: Texture decompression busy: Sampler Cache busy: Filtering busy: Bypass FIFO busy: Pixel shader busy: Color calculator busy: Map L2 From dmesg: [ 2026.252160] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung [ 2026.254795] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -11 (awaiting 402290 at 402288, next 402291) DistroRelease: Ubuntu 11.04 Package: xserver-xorg-video-intel 2:2.14.0-1ubuntu6 ProcVersionSignature: Ubuntu 2.6.38-2.29-generic 2.6.38-rc3 Uname: Linux 2.6.38-2-generic i686 Architecture: i386 Chipset: i915gm CompisitorRunning: None DRM.card0.LVDS.1:  status: connected  enabled: enabled  dpms: On  modes: 1024x768  edid-base64: DRM.card0.VGA.1:  status: disconnected  enabled: disabled  dpms: Off  modes:  edid-base64: Date: Mon Feb 7 18:50:19 2011 DistUpgraded: Yes, recently upgraded Log time: 2011-01-03 14:04:23.058239 DistroCodename: natty DistroVariant: ubuntu DumpSignature: 82856c05 ExecutablePath: /usr/share/apport/apport-gpu-error-intel.py GconfCompiz: GraphicsCard:  Subsystem: Acer Incorporated [ALI] Device [1025:006a]    Subsystem: Acer Incorporated [ALI] Device [1025:006a] InterpreterPath: /usr/bin/python2.7 MachineType: Acer TravelMate 2410 PccardctlIdent:  Socket 0:    no product info available PccardctlStatus:  Socket 0:    no card ProcCmdline: /usr/bin/python /usr/share/apport/apport-gpu-error-intel.py ProcEnviron: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic root=UUID=263aecd1-0156-49f9-8d5e-99e8079b240f ro gfxpayload=true quiet splash vt.handoff=7 ProcKernelCmdLine_: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic root=UUID=263aecd1-0156-49f9-8d5e-99e8079b240f ro gfxpayload=true quiet splash vt.handoff=7 RelatedPackageVersions:  xserver-xorg 1:7.6~3ubuntu3  libdrm2 2.4.23-1ubuntu3  xserver-xorg-video-intel 2:2.14.0-1ubuntu6 Renderer: Hardware acceleration SourcePackage: xserver-xorg-video-intel Title: [i915gm] GPU lockup 82856c05 UserGroups: dmi.bios.date: 02/07/2006 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: V1.09 dmi.board.name: Morar dmi.board.vendor: Acer dmi.board.version: Rev dmi.chassis.asset.tag: None dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.09:bd02/07/2006:svnAcer:pnTravelMate2410:pvr0100:rvnAcer:rnMorar:rvrRev:cvnAcer:ct10:cvrN/A: dmi.product.name: TravelMate 2410 dmi.product.version: 0100 dmi.sys.vendor: Acer version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.23-1ubuntu3 version.libgl1-mesa-glx: libgl1-mesa-glx 7.10-1ubuntu1 version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu3 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu6