I had the same problem and I fixed it enabling the power manager on my session. It happened after upgrading from feisty to gutsy.
-- Quit button freezes screen but does not present Log out etc. options dialog https://bugs.launchpad.net/bugs/150846 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
