With some 2d games (Commandos2,Fallout2..) intro and game are displayed with horizontal lines disturbing the correct image. I tried to disable the advanced features of the matrox, with no results. I tried with a Creative Banshee and there is no problem!
I have Asus p5a, amd k6-2 350,128mb ram, matrox millenium g200,diamond monster 3d2 12mb, sblive!basic, controller advansys u+.
Thanks!