Topic: In using Redhat Linux, I run startx and get a black screen. What should I do?
Response #1:
To get out of the black screen mode, try typing [Ctrl]-[Alt]-[Backspace].
This keystroke combination should cause the X server to exit, if possible. If that does not work, you may need to reboot the system. After the system has come up again, you should make certain that all your video hardware is compatible. Check the Hardware Compatibility List at http://hardware.redhat.com.
Also, make sure that you have the latest version of XFree86 from http://www.redhat.com/support/errata.
Response #2:
It is possible that your video card or monitor was not configured correctly. You may need to reconfigure the hardware. To do this, log in as root and run either Xconfigurator (recommended first) or XF86Setup and specify the type of hardware that you are using. Then try running startx again.
New response: