And right after posting the previous comment, my system went one step further into the state of becoming fully unusable. This time it was the 'all-decorations-and-controls-gone' kind of crash. Luckily I still had this browser window open with the terminal on top, so I was able to 'save' the i915_error_state file once more. Please find it attached, I'm curious if it differs from the first.
** Attachment added: "i915_error_state2.log" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/975083/+attachment/3041748/+files/i915_error_state2.log -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/975083 Title: [sandybridge-gt1] GPU lockup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/975083/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp