Switch user makes screen go black
I am using ubuntu edgy. Gnome.
User 'A' logged in and started a music player.
User 'B' clicked on "switch user" instead of log out and screen went black, however the mouse pointer remained active. (Black screen with a movable arrow) The music from user 'A' continued to play.
I couldn't do anything other than move the pointer around a black screen. It appeared that the screen was active as the pointer arrow would change to a hand over certain areas of the screen.
2 questions :
1) When I press ctrl-alt f2 I was able to login. From there how would i stop the music playing in user 'A's login?
2) What's going on with the black screen? is that the black screen bug I've heard of (Nvidia)?
3) I know I said 2, but how would i restart the screwed up x-session?