Adding a comment just to say that I'm under Xenial and it still happens. Even though it is marked as "Won't Fix"...
I have the problem ONLY if I quickly go from screen 1 to screen 2 and back to screen 1 (Alt-F2, Alt-F1) and I have SeaMonkey in fullscreen mode. Without apps in fullscreen, I never get that problem. To fix the problem, I can just go to a console (Ctrl-Alt-F12) and kill compiz: ps -ef | grep compiz kill -QUIT <compiz-pid> wait for it to come back (I use top to see what happens then) and then go to the 7th console (Alt-F7) to restart X11. Windows will have been moved, but everything is then back to normal. -- 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/compiz/+bug/815996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs