Comment # 9 on bug 1042042 from Wolfgang Bauer

(In reply to Andrey Goreev from comment #8)
> I did lost some work though so if the bug reoccurs I would consider a pretty
> major issue.

You lost work because you couldn't login?
Or do you rather mean the screen was locked and you couldn't unlock it?

Anyway, I don't think it will possible to find out what went wrong, if it works
now.
Please reopen if it happens again.