Comment 28 for bug 78470

I have the switch user white screen problem as described by exactt as well, but I wouldn't call it the white screen of death.
I recently discovered that if I type in the correct password and hit return I am logged back in to user A's session, so the problem is just that the screensaver login box (and black background) aren't being drawn.

I guess that people are seeing either white screens or black screens dependant on their video hardware, but the bug is quite possibly the same. I had this problem in 7.04 as well. I think, but I can't be certain that both 7.04 and 7.10 developed this problem some time after installation, possibly after I fiddled with some graphics settings.