I'm being affected by this as well. ctrl-alt-backspace works for me. I've been using #sudo shutdown -h now as a workaround. Additionally I am getting init.d S99 automount - permission denied and CIFS VFS server not responding, though I believe these to be unrelated.
-- [Hardy] Selecting "Quit" causes Gnome to stop responding https://bugs.launchpad.net/bugs/203668 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-session in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs