alright heres my situation. ive been using knoppix hd install for some time and love it. however like ALL distros, my radeon 7500 would not get detected and i would get horrible 3d performance. today i acciedentally had my knoppix cd in the tray and it booted. while it was booting i paid careful attention to the text and noticed something similar to this:

AGP Bridge Detected
video = Radeon QW(75000) using x(radeon) server.

so i let it boot into kde and tried a 3d game(chromium) and was surpassed to see that i was getting 3d accelerted graphics.

Why did it detect my gpu while im using live mode and not after after i do an hdinstall???

plez help