Created attachment 105254 [details]
GPU crash dump

Hey,

Just add the following issue on my laptop using Ubuntu 14.04.

I went from a 5minutes afk and my mouse was the only thing responding after that. 
My computer entered in sleep state 30min before for inactivity (may be taken in account).

Trace in syslog:

Aug 25 22:15:40 thunderstruck dbus[856]: [system] Activating service name='org.freedesktop.systemd1' (using servicehelper)
Aug 25 22:15:40 thunderstruck dbus[856]: [system] Successfully activated service 'org.freedesktop.systemd1'
Aug 25 22:15:44 thunderstruck kernel: [ 7688.232195] [drm] stuck on render ring
Aug 25 22:15:44 thunderstruck kernel: [ 7688.232198] [drm] GPU crash dump saved to /sys/class/drm/card0/error
Aug 25 22:15:44 thunderstruck kernel: [ 7688.232198] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
Aug 25 22:15:44 thunderstruck kernel: [ 7688.232199] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Aug 25 22:15:44 thunderstruck kernel: [ 7688.232199] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
Aug 25 22:15:44 thunderstruck kernel: [ 7688.232199] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.


Here are my specs:
* Model: SONY VAIO SVZ1311C5E
* Proc: Intel® Core™ i7-3632QM CPU @ 2.20GHz × 8 
* Graphic card: Intel® Ivybridge Mobile 

Gpu crash dump is attached.

Regards, 
Tony