I solved to problem by reinstalling the Nvidia driver. It seems the upgrade changed something in the Nvidia files. The Nvidia uninstall notified that a symbolic link was not found when the driver was uninstalled.
-- Beryl causes x server to restart when attempting to load beryl. https://launchpad.net/bugs/98939 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
