I can confirm this on a Dell Inspiron 1546.
Pressing Ctrl+Alt+F7 showed the unlock session menu, at which point gdm started working again, but crashed another time after switching from guest to user a number of times (~3 times).
I can confirm this on a Dell Inspiron 1546.
Pressing Ctrl+Alt+F7 showed the unlock session menu, at which point gdm started working again, but crashed another time after switching from guest to user a number of times (~3 times).