Ivan Matyunin, as per your https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1294391/+attachment/4031369/+files/dmesg.txt :
[ 1241.220427] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 1241.220429] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[ 1241.220431] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[ 1241.220432] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[ 1241.220434] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
Hence, could you please file a new report as noted, and post the URL of your new report?
Ivan Matyunin, as per your https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1294391/ +attachment/ 4031369/ +files/ dmesg.txt : drm/card0/ error p.org against DRI -> DRM/Intel
[ 1241.220427] [drm] GPU crash dump saved to /sys/class/
[ 1241.220429] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[ 1241.220431] [drm] Please file a _new_ bug report on bugs.freedeskto
[ 1241.220432] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[ 1241.220434] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
Hence, could you please file a new report as noted, and post the URL of your new report?