Comment 47 for bug 516909

Created an attachment (id=34126)
dmesg with drm.debug=0x02

Originally reported by KeithM at:
  https://bugs.launchpad.net/bugs/516909

Occationally, the GPU hangs, gets reset, then hangs again, etc. With drm.debug=0x02 on recent drm-intel-next kernel, dmesg fills up with

[34143.216468] [drm:i915_add_request], 524154
[34143.216659] [drm:i915_add_request], 524155
[34143.713488] [drm:intel_gpu_idle_timer], idle timer fired, downclocking
[34143.963261] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[34143.963268] render error detected, EIR: 0x00000000
[34143.963284] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 524155 at 512362)
[34143.963298] [drm:i915_error_work_func], generating error event
[34143.963323] [drm:i915_error_work_func], resetting chip
[34143.963533] [drm:gm45_get_vblank_counter], trying to get vblank count for disabled pipe 1

keith@newb:~$ lspci -nn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Clarkdale Integrated Graphics Controller [8086:0042] (rev 12)