I've been trying some different things today, and I found that if I downgrade mesa to 7.11-0ubuntu4 I've so far been unable to reproduce the issue. The problem has been elusive at times before though, so it's not definite, but I've gone back and forth between mesa versions a number of times and I've been able to consistently reproduce the issue with the newer mesa but not the older. I'm going to go ahead and add a mesa task at this point to see if we can get anywhere.
** Also affects: mesa (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/938770 Title: Desktop becomes completely unresponsive To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/938770/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs