Comment 4 for bug 914131

Forwarding this bug from Ubuntu reporter Roland Dreier:
http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/914131

[Problem]
GPU locks up but recovers after being suspended while docked with external DP monitor, resumed while undocked (only LVDS display). Was able to get to the text console, do a "DISPLAY=:0 xrandr --output LVDS1 --auto" and hit alt-f1/alt-f7 a few times and get back to a working X session.

DistroRelease: Ubuntu 12.04
Package: xserver-xorg-video-intel 2:2.15.901-1ubuntu4
Uname: Linux 3.2.0-8-generic x86_64
Architecture: amd64
Chipset: arrandale
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Mon Jan 9 22:03:42 2012
DistUpgraded: Log time: 2012-01-06 08:52:49.240576
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21c1]
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-8-generic root=UUID=677292b2-a7ba-4d9e-8f1a-662c546b62ce ro intel_iommu=igfx_off drm.debug=0xe quiet splash vt.handoff=7
RelatedPackageVersions:
 xserver-xorg 1:7.6+7ubuntu7
 libdrm2 2.4.29-1ubuntu1
 xserver-xorg-video-intel 2:2.15.901-1ubuntu4
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to precise on 2012-01-06 (3 days ago)
dmi.bios.date: 12/12/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 6UET68WW (1.48 )
dmi.board.name: 2901CTO
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:bvr6UET68WW(1.48):bd12/12/2011:svnLENOVO:pn2901CTO:pvrThinkPadT410s:rvnLENOVO:rn2901CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2901CTO
dmi.product.version: ThinkPad T410s
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.29-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.10.4-1ubuntu6
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 2:2.15.901-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1