Thank you for your bug. Do you have any error to ~/.xsession-errors, /var/log/messages or /var/log/syslog about that?
** Changed in: control-center (Ubuntu) Status: Unconfirmed => Needs Info -- GNOME/UBUNTU Session Hangs frequently https://launchpad.net/bugs/91834 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs