Same issue here. I've been also able to trigger it while doing alt+tab. I also lose my entire session when this happens. It doesn't happen always but after some hours of work. I don't detect anything special when system crashes... sorry =(
Running Metacity under Ubuntu 15.10 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to metacity in Ubuntu. https://bugs.launchpad.net/bugs/1507764 Title: metacity crashed with signal 5 in _XEventsQueued() ; forcing gnome session to logout To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1507764/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs