Comment 8 for bug 49222

I think my problem is very related:
I use a modified dvorak keyboard (as a non-english speaker) to avoid keyboard switching (with xmodmap). My password uses the same keys on both that and the default dvorak layout, which is the system default.
However, when the screen locks, it refuses to let me back in no matter what I try. I consider this a very serious bug.

I can confirm the bug directly too - when I have someone else using my PC, I need to xmodmap to their layout... but when the screen locks, we have a problem: I know the password, they know the layout. Hard-rebooting.