ATI Radeon4850 not recognized

I tried to install open SUSE 11.1 64bit. Everything went fine till I’m reached the point Hardware configuration. A Msgbox pops up and says “Trying to dedect grafic card” (or simular) Then the monitor went to power save mode came back and after a few seconds went to power save mode again. Well, that’s what I saw for an hour - restart - Continue Installation same procedure as mentioned above. Can anyone give me advise how I can get rid of this scenario? Grafikcard is an: 512MB ATI Radeon4850

There is an option in the install to manually set the hardware. Try this.
Once installed, install the radeon support from the repo or from ati’s site.