Bug 41727

Forwarding this bug from Ubuntu reporter Dave Russell:
http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/868684

[Problem]
Graphics blank and can't be woken or interacted with.  Doesn't appear to be a GPU hang; perhaps bad interaction with DPMS?

[Original Description]
Just came back to the screen to find it hung, I could still move the mouse but nothing else. Unable to interact with the system graphically. Was able to ssh in and gather this information before rebooting.

The messages below correspond to when the system became unresponsive.

Unfortunately I've not found an activity that provokes it more often than anything else. I'm getting about 1-2 of these per day currently.

As for when it started happening, I can't be more specific than some time after the 3rd of October.

Another reporter with the same set of error messages believes the problem occurs when Gnome puts the monitor into standby.  "After moving my mouse the screen came back but it was like frozen. I could click on a launcher but it showed no reaction.  Then I switched to tty1 and back to graphical desktop and the screen was alive again.  But everything was slow, If I take a look at Xorg.0.log I see the following messages.  Somehow this reminds me of an old bug where the vblank counter got confused because of "DPMS off"."

[ 23113.957] (WW) intel(0): I830DRI2GetMSC:1297 get vblank counter failed: Invalid argument
[ 23113.957] (WW) intel(0): I830DRI2ScheduleWaitMSC:1364 get vblank counter failed: Invalid argument
[ 23113.957] (WW) intel(0): I830DRI2GetMSC:1297 get vblank counter failed: Invalid argument
[ 23113.957] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 23114.030] (WW) intel(0): I830DRI2GetMSC:1297 get vblank counter failed: Invalid argument
[ 23114.031] (WW) intel(0): I830DRI2ScheduleWaitMSC:1364 get vblank counter failed: Invalid argument
[ 23114.031] (WW) intel(0): I830DRI2GetMSC:1297 get vblank counter failed: Invalid argument
[ 23114.031] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 23114.065] (WW) intel(0): I830DRI2GetMSC:1297 get vblank counter failed: Invalid argument
[ 23114.065] (WW) intel(0): I830DRI2ScheduleWaitMSC:1364 get vblank counter failed: Invalid argument
[ 23114.084] (WW) intel(0): I830DRI2ScheduleWaitMSC:1364 get vblank counter failed: Invalid argument
[ 23114.105] (WW) intel(0): I830DRI2ScheduleWaitMSC:1364 get vblank counter failed: Invalid argument
[ 23212.685] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 23379.328] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 23379.409] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 23442.436] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 24649.942] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 24650.051] (WW) intel(0): first get vblank counter failed: Invalid argument
[ 24730.542] (WW) intel(0): first get vblank counter failed: Invalid argument

DistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
Date: Wed Oct  5 21:30:51 2011
DistUpgraded: Log time: 2011-09-22 20:36:49.680898
DistroCodename: oneiric
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GpuHangFrequency: Several times a day
GpuHangReproducibility: Occurs more often under certain circumstances
GpuHangStarted: Within the last few days
GraphicsCard:
Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:20e4]
Subsystem: Lenovo Device [17aa:20e4]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1)
MachineType: LENOVO 2241B48
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, user)
LANG=en_GB.UTF-8ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-12-generic root=UUID=4587a2fe-b540-495f-ab91-999ee1b53a2a ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to oneiric on 2011-09-30 (4 days ago)
dmi.bios.date: 04/22/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 6FET66WW (2.16 )
dmi.board.name: 2241B48
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:bvr6FET66WW(2.16):bd04/22/2009:svnLENOVO:pn2241B48:pvrThinkPadT500:rvnLENOVO:rn2241B48:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2241B48
dmi.product.version: ThinkPad T500
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu3
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1