Created attachment 114402 [details]
xzipped gpu crash dump

Hi, I'm filing a new gpu crash dump bug, following the instructions found in the syslog:

Mar 17 14:12:11 c2 kernel: [76945.504719] [drm] stuck on render ring
Mar 17 14:12:11 c2 kernel: [76945.504722] [drm] GPU crash dump saved to /sys/class/drm/card0/error
Mar 17 14:12:11 c2 kernel: [76945.504722] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
Mar 17 14:12:11 c2 kernel: [76945.504723] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Mar 17 14:12:11 c2 kernel: [76945.504723] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
Mar 17 14:12:11 c2 kernel: [76945.504723] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.

I've attached the gpu crash dump.  This is on ubuntu 14.04.2 on x86-64 with the following ubuntu package versions:

~/tmp/gpu-crash-dumps$ dpkg -l | grep -E '^....Name| (xserver-xorg(-core|-video-intel)?) '
||/ Name                                                  Version                                             Architecture Description
ii  xserver-xorg                                          1:7.7+1ubuntu8.1                                    amd64        X.Org X server
ii  xserver-xorg-core                                     2:1.15.1-0ubuntu2.7                                 amd64        Xorg X server - core server
ii  xserver-xorg-video-intel                              2:2.99.910-0ubuntu1.4                               amd64        X.Org X server -- Intel i8xx, i9xx display driver


Thank you,
Brian