Comment 13 for bug 478253

This happened to me, too. I upgraded karmic to lucid on my ShuttleX a few days ago, and the new installation kept all my old settings - good! - but when I experimented with switching between users, I got the black screen your other correspondents reported, although I did have a white cursor which my mouse controlled. After staring at the computer screen for ages, vainly hoping that something would happen, I suddenly wondered if it might be expecting me to type in the password for the destination user. Doing this enabled me to regain control of the computer, but not straightaway (I miskeyed the password first time). I think the source of this problem lies with the default logon splash screen.