This keeps happening to me now. I usually have to restart X with Ctrl+Alt+PrtSc+K, log back in, and kill the extra compiz process. Sometimes I have to do it twice.
I've attached a backtrace ** Attachment added: "backtrace of compiz after crash using tty1" https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/815996/+attachment/2743110/+files/compiz_debug.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/815996 Title: Desktop occasionally freezes/locks up when switching workspaces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/815996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs