Created attachment 119559 [details]
/sys/class/drm/card0/error

The desktop blanks with black, then it is covered with horizontal lines and bars.
If I refresh desktop /windows it shows some parts normal and others corrupted.
My feeling - It appears more frequently when I use some memory/cpu intense applications like browsers with animation or eclipse IDE.
Screenshot attached.



[ 7265.816046] [drm] stuck on render ring
[ 7265.817277] [drm] GPU HANG: ecode 3:0:0x02fbf842, in Xorg [701], reason: Ring hung, action: reset
[ 7265.817282] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[ 7265.817285] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[ 7265.817288] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[ 7265.817291] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[ 7265.817294] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 7266.126535] drm/i915: Resetting chip after gpu hang
[15175.816042] [drm] stuck on render ring
[15175.817205] [drm] GPU HANG: ecode 3:0:0x02feffc2, in Xorg [4122], reason: Ring hung, action: reset
[15175.883206] drm/i915: Resetting chip after gpu hang
[15565.816054] [drm] stuck on render ring
[15565.817239] [drm] GPU HANG: ecode 3:0:0x6affbfc1, in Xorg [4122], reason: Ring hung, action: reset
[15565.895785] drm/i915: Resetting chip after gpu hang
root@printn211b:~# uname -a
Linux printn211b 4.2.0-18-generic #22-Ubuntu SMP Fri Nov 6 18:25:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux