Yast->Hardware->Graphics card and monitor
Select card, then select "Remove this card." If you attempt to save it, it will tell you that you have to configure at least one video card. Then you just set up everything from scratch in Yast. BTW, I had to do this again, when the last kernel update came in. I tried screwing with the driver for about an hour, never could get 3D working. Finally gave up and did this, and SHAZAM!, all good again.