Public bug reported:

I have a Thinkpad T61 with a GMA950 intel graphics card. The bug occours
when having an external screen plugged in and wants to unplug it. If I
just pull the plug I am garanteed a black screen and there is nothing to
do than a hard shutdown. If I disconnects the external screen from the
Monitor menu, it only crashes 50% of the times.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-31.62-generic 2.6.35.13
Uname: Linux 2.6.35-31-generic i686
NonfreeKernelModules: openafs
Architecture: i386
DRM.card0.DVI.D.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes: 
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1680x1050
 edid-base64: 
AP///////wAkTYcoAAAAAAAPAQOAIRV4CrylmFhViygkUFQAAAABAQEBAQEBAQEBAQEBAQEBHC+Q0GAaD0AgMBMAS88QAAAZRSeQ0GAaD0AgMBMAS88QAAAZAAAADwCzCjKzCigUAQAyDAAAAAAA/gBMUDE1NFcwMi1UTDA2AL8=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: On
 modes: 
 edid-base64:
Date: Fri Nov 25 07:13:33 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: LENOVO 6464WMJ
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-31-generic 
root=UUID=259b101c-cbe4-44db-8406-3417bf32d3b4 ro quiet splash
ProcEnviron:
 LANGUAGE=en_DK:en
 LANG=en_DK.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg
dmi.bios.date: 05/11/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7LETC6WW (2.26 )
dmi.board.name: 6464WMJ
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:bvr7LETC6WW(2.26):bd05/11/2009:svnLENOVO:pn6464WMJ:pvrThinkPadT61:rvnLENOVO:rn6464WMJ:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 6464WMJ
dmi.product.version: ThinkPad T61
dmi.sys.vendor: LENOVO
system:
 distro:             Ubuntu
 codename:           maverick
 architecture:       i686
 kernel:             2.6.35-31-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 maverick

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https://bugs.launchpad.net/bugs/894641

Title:
  [Maverick] Crash when unplugging/disconnecting external screen

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