Changinnng to default BIOS settings has created problems.

[Eberhard Roloff]

Eberhard Roloff wrote:

CORRECTION:

> As I see it, you can try to start your Linux normally, i.e. not in 
> rescue mode. When you are at the black screen, seeing "nothing", you 
> might press "CTRL-Alt-Del" 
                ~~wrong~~~~ This will probably restart your system, my 
fault!

This is "Ctrl-Alt-Backspace" to kill your X

Note: There have been changes in Jaunty. So:

If it does not work in Jaunty, try "Ctrl-Alt-F2" to get to the second tty.
After login, you might kill the non-working X with
sudo killall kdm