Had a non-fatal GPU hang (possibly a different issue), but when I tried to cat the file I got:
cat: /sys/kernel/debug/dri/0/i915_error_state: Cannot allocate memory The kernel also syslogged detailed information about this. Presumably it's kernel memory that can't be allocated, since the system has plenty of free RAM, not to mention swap. I've reset the i915_error_state and subsequent cats succeed, though of course the state is empty. I'll need to restart X now, as it's switched to an unaccelerated mode. Will update if I see the parent crash bug again. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1211123 Title: Xorg i915 hangcheck hung GPU after workspace switch Status in “xserver-xorg-video-intel” package in Ubuntu: Incomplete Bug description: Running 13.04 raring with latest updates, but this kind of GPU freeze has occurred numerous times in the past year. It always occurs when the system is under high CPU and I/O load, e.g. after resuming from sleep. Memory is not a factor, as there are gigabytes of free memory. The most reliable way to trigger this crash is to rapidly switch between workspaces, while the system is heavily loaded. i915_error_state from immediately following the crash is attached. Extracts of relevant files: dmesg | tail -1 [2757537.808259] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung Xorg.0.log | tail -4 [2757537.808] (EE) intel(0): Detected a hung GPU, disabling acceleration. [2757537.808] (EE) intel(0): When reporting this, please include i915_error_state from debugfs and the full dmesg. [2757537.837] [mi] Increasing EQ size to 512 to prevent dropped events. [2757601.808] (II) AIGLX: Suspending AIGLX clients for VT switch lspci -vvv 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device 029b 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- Latency: 0 Interrupt: pin A routed to IRQ 44 Region 0: Memory at d0000000 (64-bit, non-prefetchable) [size=4M] Region 2: Memory at c0000000 (64-bit, prefetchable) [size=256M] Region 4: I/O ports at 30d0 [size=8] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Address: fee0300c Data: 41c1 Capabilities: [d0] Power Management version 3 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Kernel driver in use: i915 00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) Subsystem: Acer Incorporated [ALI] Device 029b 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- Latency: 0 Region 0: Memory at d2400000 (64-bit, non-prefetchable) [size=1M] Capabilities: [d0] Power Management version 3 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1211123/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
