Reassinging to xserver-xorg-video-nouveau as Stephen indicated it might be a driver problem, not a Mir problem.
** Project changed: mir => xserver-xorg-video-nouveau (Ubuntu) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1207985 Title: compiz assert failure: compiz: pthread_mutex_lock.c:65: __pthread_mutex_lock: Zusicherung »mutex->__data.__owner == 0« nicht erfüllt. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1207985/+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