http://bugs.winehq.org/show_bug.cgi?id=21932
--- Comment #3 from Henri Verbeet hverbeet@gmail.com 2010-03-06 12:31:02 --- (In reply to comment #2)
I tried Elder Scrolls III: Morrowind on wine 1.1.40 & nvidia 8600GT and no such problems. Game runs fast here.
The problem is probably specific to certain GL implementations / cards. I did quite some testing on the performance impact of the patch before sending it in, because some slowdown is expected. I guess fglrx is simply more sensitive to flushing.
Also, this is probably a duplicate of bug 21819.