GPU hang

[Stuart Langridge]

Binary package hint: xorg

My screen went entirely black (both laptop screen and second monitor). Switching to a VC did not show anything on screen. At first I could still hear sounds from running applications, but eventually (after ~10 seconds) they stopped. I had to powercycle the machine to get control back. The "system problem detected" apport dialog offered to let me file a bug, but then I got another crash dialog saying "apport-gpu-error-intel.py closed unexpectedly". Attaching dmesg at bryceh suggestion: /sys/kernel/debug/dri/0/i915_error_state is 0 bytes.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x800
 edid-base64: AP///////wAwZAYjMjQ5NTISAQOAHRJ4Cof1lFdPjCcnUFQAAAABAQEBAQEBAQEBAQEBAQEBKhwAqFAgHjAQMCIAH7QQAAAYAAAAAAAAAAAAAAAAAAAAAAAAAAAA/gBSUDc3NKMxMzNFV0REAAAA/gAIDBAUKFB/2AEBCiAgAL4=
DRM.card0.VGA.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1680x1050 1280x1024 1280x1024 1280x960 1152x864 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400
 edid-base64: AP///////wBMLdIDMjJBSCMTAQMOMB54KtxVo1lIniQRUFS/74CzAIGAgUBxTwEBAQEBAQEBITmQMGIaJ0BosDYA2igRAAAcAAAA/QA4Sx5REAAKICAgICAgAAAA/ABTeW5jTWFzdGVyCiAgAAAA/wBIOUZTODM5NDg1CiAgAAI=
Date: Thu Apr 21 10:09:32 2011
DistUpgraded: Log time: 2011-01-18 17:25:59.814253
DistroCodename: natty
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 0c) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0209]
   Subsystem: Dell Device [1028:0209]
MachineType: Dell Inc. XPS M1330
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 LC_MESSAGES=en_GB.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: root=UUID=b572742c-deea-43ec-92d3-b1d1e6b6802f ro quiet splash
Renderer: Unknown
SourcePackage: xorg
UpgradeStatus: Upgraded to natty on 2011-01-18 (92 days ago)
dmi.bios.date: 12/26/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A15
dmi.board.name: 0N6705
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA15:bd12/26/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn0N6705:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1330
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7