For completeness, below an example from the syslog under Kernel 3.8.2 (again needed emergency reset). I also tried Kernel 2.6.38-13, which did not result in the same "GPU hung" message, but lots of other crash reports, so I gave up quite quickly.
Mar 12 23:01:48 sppc26 kernel: [ 0.000000] Linux version 3.8.2-030802-generic (root@gomeisa) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201303031906 SMP Mon Mar 4 00:07:09 UTC 2013 Mar 12 23:01:48 sppc26 kernel: [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.8.2-030802-generic root=UUID=5083e04c-1bad-44bf-a241-c839914a697a ro crashkernel=384M-2G:64M,2G-:128M quiet splash i915.i915_enable_rc6=0 . . . Mar 12 23:09:37 sppc26 kernel: [ 505.650930] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung Mar 12 23:09:37 sppc26 kernel: [ 505.650935] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state Mar 12 23:12:46 sppc26 kernel: [ 695.152169] SysRq : This sysrq operation is disabled. -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to a duplicate bug report (644740). https://bugs.launchpad.net/bugs/946899 Title: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/946899/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs