Comment # 17 on bug 98146 from Darek Deoniziak

Regarding new issue in 2 problem with DRI3. The frame problem is vsync related,
after removing Option "SwapBuffersWait" "0" and enabling vsync in Half Life 2
issue is no more, picture is also clear.

Unfortunately in Serious Sam 3 regardless of value of vsync in game options the
frames still have issues. In DRI2 Serious Sam 3 has no issues except screen
cutted.

What else can I try?