after knoppix runs through its intialization and tries to enter runlevel 5, my monitor shuts off. i can see everything until that point when it tries to start the GUI. i thought it was some ambiguous command in the startup that did it so i started knoppix in runlevel 2 and then tried to use the 'startx' command. it gets into the process of loading the gui, but the screen still shuts off. the cd continues to load the GUI into the memory though. help please.