This seems to be fairly reproducible using steps mentioned by Brian inhttps://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/127101 - basically start/stop video and switch back and forth to VTs.
This seems to be fairly reproducible using steps mentioned by Brian inhttps: //bugs. launchpad. net/ubuntu/ +source/ xserver- xorg-video- intel/+ bug/127101 - basically start/stop video and switch back and forth to VTs.