I just tried to install RedHat Linux 7.0 on a clean system (no OS already installed). First steps of installation run well. Configuration: - PIII 800, 512 MB - Screen: Mitsubishi Diamond Pro 87TXM - Video card: Matrox G400 16 MB, dual head. When I arrived at X configuration, I choose my screen (Mitsubishi Diamond Pro 87TXM). Then anaconda find my video card and says that it's a Matrox G400 Generic, with 16 MB of RAM. That's ok, and I click on "Test this configuration". Then, "Yes", I can see the test message, and everything is well displayed... After clicking on "Yes"... no more video, everything is dark, so dark ! - Using Ctrl+Alt+F1 to F7, I can swith consoles. F7 -> still black screen. - [Enter] -> I can test again the X configuration, but unable to go back to installation screen. Then, anaconda loops on the X configuration test, always displaying the test message, going back to black screen, again, again...
Some video cards do not test correctly due to problems with the X server. This is a known problem and we are working with the XFree86 group to resolve these as soon as possible. Just proceed through the install w/o testing and then when you reboot into the system it should work fine.