Problem with MGA driver in X

[Xavier LaRue <paxl@paxl.org>]

Hi,

I was just playing with OpenGL using my Matrox G400
when I came over a problem that apear with the 
update of X to 4.3.0

Using this program http://nehe.gamedev.net/data/lessons/linuxsdl/lesson02.tar.gz
which is suposed to display a white triangle and a white quad. The quad don't
appear. If I move the code place to draw the Quad first, the triangle doesn't
appear. 

I would like to know if somone have experimented the problem
and if somone have a solution.

Thank you in advence
Xavier LaRue