I was wrong. Upgrading to 3.3.7 DIDN'T fixed it for me. Another freeze. Coincidentally I was using VirtualBox at that time.
It looks to me like an IO lock-up. I noticed that it doesn't freeze completely immediately. It takes a few minutes before the total freeze. For some time the exiting windows partially work but network connectivity disappears (existing SSH connections stay fine), IO Wait consumes most of cores, no application can be launched or normally closed, compiz takes about 50% of one core. It very much sounds like some sort of IO lock. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/993187 Title: ubuntu 12.04 completely freezes frequently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/993187/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
