[Wine] Graphics Flickering Issue w/ Wine & ati Radeon HD 4870

[eoswins]

I've posted this on the ubuntu forums as well with some additional postage there: http://ubuntuforums.org/showthread.php?t=1749918


I am having a graphics problem that is prohibiting me from playing portal 2 (serious business). I just recently installed Wine. I tried to play portal 2 and my graphics start flickering rapidly, mostly black.

tried on
ubuntu 10.10 64 bit
wine version 1.3
ati radeon hd 4870 ver 11.3(i believe) 04:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4870]



i updated to ati radeon hd 4870 ver 11.4 and still same problem.

I've played another game called Nexuiz which works fine with my graphics card, not Wine of course.....any help would be appreciated. Thank you.