I also happened sometimes that black screen came and UI freezed; had to reboot by ALT- Print Screen - s u b. Both, xfwm4's compositor enabled and disabled.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1409332 Title: Mouse cursor freezes, when using e.g. youtube in chromium, and stays that way To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1409332/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp