Hi
I think you allready downloaded the ATI driver for your Raedon at
http://www.ati.com/support/driver.html
For SuSE 9.1 select the XFree 4.3.0 driver.
After installing the ATI driver run SaX2 again, but you have to refresh the detection database. After installing the ATI driver do the following:
As root open a shell
Change to system level 3
# init 3
Start SaX2 with option Refresh, because your configuration might be corrupted
# SaX2 -r
Now change to the Display section. Make shure you selected the correct Monitor and Graphic adaptor
Rg. Dirk