The same happened to me. I just locked the screen (Ctrl+Alt+L) and then I wasn't able to enter my session. gnome-screensaver didn't show me the lock screen whit password field. When I click with the mouse, the screensaver disappears and the mouse appears above the black screen for about one second and then the screensaver reappears. I had to go to one console (Ctrl Alt F1) to kill gnome-screensaver and reenter my session. Then I can launch gnome-screensaver again.
** Changed in: gnome-screensaver (Ubuntu) Status: New => Confirmed -- gnome-screensaver-dialog crashed with SIGSEGV in g_type_create_instance() https://bugs.launchpad.net/bugs/275957 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs