I have a similar problem, but only on Feisty with out compiz. My wife tried to log in (switch user) and the screen went black. Nothing came back up. Alt + CTL + F1 didn't take me to the rescue command line. I had to actually use the reset button on the box to reboot the machine.
I don't know what logs to quote. I am too much of a noob. Ask and you will receive.
I have a similar problem, but only on Feisty with out compiz. My wife tried to log in (switch user) and the screen went black. Nothing came back up. Alt + CTL + F1 didn't take me to the rescue command line. I had to actually use the reset button on the box to reboot the machine.
I don't know what logs to quote. I am too much of a noob. Ask and you will receive.