Kernel Oops - kernel BUG at /build/buildd/linux-2.6.38/drivers/gpu/drm/i915/i915_gem.c:3252!; RIP: 0010:[<ffffffffa027b749>] [<ffffffffa027b749>] i915_gem_object_pin+0x179/0x1c0 [i915]

After Startup this crash happens... No visible issues, just this crash report...

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: srhl62 1812 F.... pulseaudio
 /dev/snd/controlC2: srhl62 1812 F.... pulseaudio
CRDA: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden
Card0.Amixer.info:
 Card hw:0 'CinemaTM'/'Microsoft Microsoft® LifeCam Cinema(TM) at usb-0000:00:1a.7-3.4, high speed'
   Mixer name : 'USB Mixer'
   Components : 'USB045e:075d'
   Controls : 2
   Simple ctrls : 1
Card0.Amixer.values:
 Simple mixer control 'Mic',0
   Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
   Capture channels: Mono
   Limits: Capture 0 - 56
   Mono: Capture 51 [91%] [31.00dB] [off]
Card1.Amixer.info:
 Card hw:1 'Pro'/'M-Audio FastTrack Pro at usb-0000:00:1d.0-1, full speed'
   Mixer name : 'USB Mixer'
   Components : 'USB0763:2012'
   Controls : 0
   Simple ctrls : 0
Card1.Amixer.values:

Card2.Amixer.info:
 Card hw:2 'Intel'/'HDA Intel at 0xfe020000 irq 46'
   Mixer name : 'Analog Devices AD1984'
   Components : 'HDA:11d41984,17aa20dd,00100400'
   Controls : 31
   Simple ctrls : 19
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7RHT16WW-1.02'
   Mixer name : 'ThinkPad EC 7RHT16WW-1.02'
   Components : ''
   Controls : 1
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Thu Apr 14 19:57:41 2011
Failure: oops
Frequency: I don't know.
HibernationDevice: RESUME=UUID=467bfe5d-d61f-4d4d-a240-221e9b628253
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MachineType: LENOVO 776294G
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=9135f45f-d3be-4a09-aac3-ae19d0f4880f ro elevator=noop quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-8-generic N/A
 linux-backports-modules-2.6.38-8-generic N/A
 linux-firmware 1.50
SourcePackage: linux
Title: kernel BUG at /build/buildd/linux-2.6.38/drivers/gpu/drm/i915/i915_gem.c:3252!
UpgradeStatus: Upgraded to natty on 2011-04-14 (0 days ago)
dmi.bios.date: 10/12/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7SET38WW (1.24 )
dmi.board.name: 776294G
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:bvr7SET38WW(1.24):bd10/12/2009:svnLENOVO:pn776294G:pvrThinkPadX61Tablet:rvnLENOVO:rn776294G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 776294G
dmi.product.version: ThinkPad X61 Tablet
dmi.sys.vendor: LENOVO