I have installed Redhat 9 as well as Knoppix on my notebook with UXGA and ATI Radeon 7500. Redhat was actually dead easy to re-configure after initial installation. With Knoppix 3.4 I had to copy the right XFree86 config files from /etc/X11 from a CD-boot - from the ram drive, after using a cheat code. The HD install failed to detect the UXGA screen. As for Redhat, for both the screen and video card choices one uses the Xconfigurator (as for several previous Redhat versions), -there are a a huge variety of options for both screen and card.Knoppix does its best automatically, and like much automated hardware detection, can get it in wrong, just like for Redhat. But Knoppix does not have as able manual configurator, as far as I have experienced it on an identical system.