desktop effect = white screen!

Ok, I found the thread that tells you what to do but Im still stuck. My root password works when I install software and get into yast, but when I try to relogin, it wont work, it says authorization failed. I know its that password because thats the only password I used during installation. I checked to see if I can get into the root system with the DVD by going into repair and such, but no luck. I tried to login through alt+f4, something close to that, and it doesnt work.

What should I do? This is after I installed compiz. I have an ATI video card as well. I never did anything for drives after I installed Opensuse either.

ATI + Desktop Effects = White - Page 2 - openSUSE Forums