Hi, I am having the same issue on my Toshiba Tecra M5 laptop. The output from my kern.log when this happens is:
May 7 21:30:51 ccc017400 kernel: [41191.508136] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung May 7 21:30:51 ccc017400 kernel: [41191.508151] render errMay 7 21:30:51 ccc017400 kernel: [41191.508136] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung May 7 21:30:51 ccc017400 kernel: [41191.508151] render error detected, EIR: 0x00000000 May 7 21:30:51 ccc017400 kernel: [41191.508192] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 2207294 at 2207291) May 7 21:30:52 ccc017400 kernel: [41192.724110] wlan0: deauthenticating from 00:1f:33:7a:8c:b2 by local choice (reason=3) May 7 21:49:44 ccc017400 kernel: Kernel logging (proc) stopped. May 7 21:50:41 ccc017400 kernel: imklog 4.2.0, log source = /proc/kmsg started.or detected, EIR: 0x00000000 May 7 21:30:51 ccc017400 kernel: [41191.508192] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 2207294 at 2207291) May 7 21:30:52 ccc017400 kernel: [41192.724110] wlan0: deauthenticating from 00:1f:33:7a:8c:b2 by local choice (reason=3) May 7 21:49:44 ccc017400 kernel: Kernel logging (proc) stopped. May 7 21:50:41 ccc017400 kernel: imklog 4.2.0, log source = /proc/kmsg started. My output from lspci -vvnn: 00:02.1 Display controller [0380]: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller [8086:27a6] (rev 03) Subsystem: Toshiba America Info Systems Device [1179:0004] Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Region 0: Memory at 8a200000 (32-bit, non-prefetchable) [disabled] [size=512K] Capabilities: <access denied> The tail end of my Xorg.0.log is: (II) UXA(0): Driver registered support for the following operations: (II) solid (II) copy (II) composite (RENDER acceleration) (==) intel(0): Backing store disabled (==) intel(0): Silken mouse enabled (II) intel(0): Initializing HW Cursor (II) intel(0): No memory allocations Fatal server error: Failed to submit batchbuffer: Input/output error Please consult the The X.Org Foundation support at http://wiki.x.org for help. Please also check the log file at "/var/log/Xorg.0.log" for additional information. ddxSigGiveUp: Closing log For me this appears to happen when my external monitor goes to standby mode. I will test this on the laptop display. -- [g41] GPU hung: Failed to submit batchbuffer: Input/output error https://bugs.launchpad.net/bugs/555573 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ 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