Did the system actually lock up on you requiring a power cycle? Or did it display this error dialog but you didn't notice anything wrong?
It looks from the logs like it locked up but then automatically recovered itself. (Which I think is a bug we already know of.) ** Description changed: - Binary package hint: xserver-xorg-video-intel + I've upgraded Ubuntu 11.04 and when restarted it has crashed. - I've upgraded Ubuntu 11.04 and when restarted it has crashed. + From GPU dump: + ACTHD: 0xffffffff + EIR: 0x00000000 + EMR: 0xfffffffd + ESR: 0x00000010 + PGTBL_ER: 0x00000002 + IPEHR: 0x00000000 + IPEIR: 0x00000000 + INSTDONE: 0x7dffffc0 + busy: Framebuffer Compression + + From dmesg: + [ 14.026947] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 + [ 14.026954] i915 0000:00:02.0: setting latency timer to 64 + [ 14.039382] mtrr: type mismatch for d0000000,10000000 old: write-back new: write-combining + [ 14.039385] [drm] MTRR allocation failed. Graphics performance may suffer. + [ 14.040101] i915 0000:00:02.0: irq 43 for MSI/MSI-X + [ 14.040107] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). + [ 14.040109] [drm] Driver supports precise vblank timestamp query. + [ 14.048049] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem + [ 14.048456] [drm] initialized overlay support + [ 14.051890] render error detected, EIR: 0x00000010 + [ 14.051893] page table error + [ 14.051895] PGTBL_ER: 0x00000002 + [ 14.051897] [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking + [ 14.051909] render error detected, EIR: 0x00000010 + [ 14.051911] page table error + [ 14.051912] PGTBL_ER: 0x00000002 + [ 14.140469] checking generic (d0000000 300000) vs hw (d0000000 10000000) + [ 14.140473] fb: conflicting fb hw usage inteldrmfb vs VESA VGA - removing generic driver + [ 14.140493] Console: switching to colour dummy device 80x25 + [ 14.141214] Console: switching to colour frame buffer device 180x56 + [ 14.141221] fb0: inteldrmfb frame buffer device + [ 14.141223] drm: registered panic notifier + [ 14.141665] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 + ProblemType: Crash DistroRelease: Ubuntu 11.04 Package: xserver-xorg-video-intel 2:2.14.0-1ubuntu6 ProcVersionSignature: Ubuntu 2.6.38-2.29-generic 2.6.38-rc3 Uname: Linux 2.6.38-2-generic i686 Architecture: i386 Chipset: q35 DRM.card0.VGA.1: - status: connected - enabled: enabled - dpms: On - modes: 1440x900 1400x1050 1280x1024 1280x1024 1440x900 1280x960 1152x921 1280x800 1152x864 1280x720 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400 - edid-base64: AP///////wAhNAhgIw0AACkQAQMIKRp46rVlpFhJmSQRUFS/74CVD4GAgUCBwIEPcZCQTwEBxCKgoFCEGjAwIDYAmgERAAAeAAAA/ABYOTFXIEQtc3ViCiAgAAAA/QA4TB9UEAAKICAgICAgAAAA/wBYOTFXQzYwTDAzMzYzAG8= + status: connected + enabled: enabled + dpms: On + modes: 1440x900 1400x1050 1280x1024 1280x1024 1440x900 1280x960 1152x921 1280x800 1152x864 1280x720 1024x768 1024x768 1024x768 832x624 800x600 800x600 800x600 800x600 640x480 640x480 640x480 640x480 720x400 + edid-base64: AP///////wAhNAhgIw0AACkQAQMIKRp46rVlpFhJmSQRUFS/74CVD4GAgUCBwIEPcZCQTwEBxCKgoFCEGjAwIDYAmgERAAAeAAAA/ABYOTFXIEQtc3ViCiAgAAAA/QA4TB9UEAAKICAgICAgAAAA/wBYOTFXQzYwTDAzMzYzAG8= Date: Mon Feb 7 10:55:26 2011 DistUpgraded: Fresh install DistroCodename: natty DistroVariant: ubuntu DumpSignature: aa9dd4a2 (PGTBL_ER: 0x00000002) ExecutablePath: /usr/share/apport/apport-gpu-error-intel.py GraphicsCard: - Subsystem: Dell OptiPlex 755 [1028:0211] - Subsystem: Dell OptiPlex 755 [1028:0211] + Subsystem: Dell OptiPlex 755 [1028:0211] + Subsystem: Dell OptiPlex 755 [1028:0211] InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110202) InterpreterPath: /usr/bin/python2.7 MachineType: Dell Inc. OptiPlex 755 ProcCmdline: /usr/bin/python /usr/share/apport/apport-gpu-error-intel.py ProcEnviron: - + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic root=UUID=eaab1957-85b9-43ea-a6ff-20417190c637 ro quiet splash vt.handoff=7 ProcKernelCmdLine_: BOOT_IMAGE=/boot/vmlinuz-2.6.38-2-generic root=UUID=eaab1957-85b9-43ea-a6ff-20417190c637 ro quiet splash vt.handoff=7 RelatedPackageVersions: - xserver-xorg 1:7.6~3ubuntu3 - libdrm2 2.4.23-1ubuntu3 - xserver-xorg-video-intel 2:2.14.0-1ubuntu6 + xserver-xorg 1:7.6~3ubuntu3 + libdrm2 2.4.23-1ubuntu3 + xserver-xorg-video-intel 2:2.14.0-1ubuntu6 SourcePackage: xserver-xorg-video-intel Title: [q35] GPU lockup aa9dd4a2 (PGTBL_ER: 0x00000002) UserGroups: - + dmi.bios.date: 08/04/2008 dmi.bios.vendor: Dell Inc. dmi.bios.version: A11 dmi.board.name: 0PU052 dmi.board.vendor: Dell Inc. dmi.chassis.type: 15 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA11:bd08/04/2008:svnDellInc.:pnOptiPlex755:pvr:rvnDellInc.:rn0PU052:rvr:cvnDellInc.:ct15:cvr: dmi.product.name: OptiPlex 755 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.2.1+glibmainloop4-0ubuntu9 version.libdrm2: libdrm2 2.4.23-1ubuntu3 version.libgl1-mesa-glx: libgl1-mesa-glx 7.10-1ubuntu1 version.xserver-xorg: xserver-xorg 1:7.6~3ubuntu3 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.13.2+git20110124.fadee040-0ubuntu4 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu6 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu4 ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Incomplete ** Summary changed: - [q35] GPU lockup aa9dd4a2 (PGTBL_ER: 0x00000002) + [q35] GPU lockup aa9dd4a2 (PGTBL_ER: 0x00000002 ESR: 0x00000010) ** Summary changed: - [q35] GPU lockup aa9dd4a2 (PGTBL_ER: 0x00000002 ESR: 0x00000010) + [q35] GPU lockup (PGTBL_ER: 0x00000002 ESR: 0x00000010) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. https://bugs.launchpad.net/bugs/714474 Title: [q35] GPU lockup (PGTBL_ER: 0x00000002 ESR: 0x00000010) _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp