Re: GTX 275 only shows blank, black screen under Linux 2.6.30 on Gigabyte GA-EX58-UD5
What exactly is the command line you're using? If you're just starting X, the expected behavior of modern X servers is to show a black screen with no cursor until a client connects and tells it to do something. Also, Ctrl-Alt-Backspace was disabled in recent X releases. It sounds like the X server is operating as designed.