Spoke too soon: still happens intermitently. More information on similar-looking bug here: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/966744 May be a duplicate. Robin
Spoke too soon: still happens intermitently. /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- intel/+ bug/966744
More information on similar-looking bug here:
https:/
May be a duplicate.
Robin