I have the same problem, but I'm not sure it only affects the password prompt.
I have experienced freezes like that even when I'm in Thunderbird and wanted to start replying to an email by hitting [enter] to make extra room for my reply, on the first click of [enter] the computer totally froze. clock stopped working, mouse, keyboard stopped working, couldn't open another shell or anything. Had to use hardware power button.
First I thought this bug was related to a password prompt, but after this it seems it's related to the keyboard [enter] button...
Norwegian keyboard, by the way.
I have the same problem, but I'm not sure it only affects the password prompt.
I have experienced freezes like that even when I'm in Thunderbird and wanted to start replying to an email by hitting [enter] to make extra room for my reply, on the first click of [enter] the computer totally froze. clock stopped working, mouse, keyboard stopped working, couldn't open another shell or anything. Had to use hardware power button.
First I thought this bug was related to a password prompt, but after this it seems it's related to the keyboard [enter] button...
Norwegian keyboard, by the way.