AGP 2x in X ?

[Dominique Deleris <ddeleris@bluewin.ch>]

Hello list,

Does anyone of you know how to tell the X server to use AGP 2x
mode ?

I have a Matrox G400 32Mb (AGP) card, and use a custom 2.4.4
kernel, which has agpgart and matrox accel support built
in. Anyhow, when I have a look at /var/log/XFree86.0.log, here is
what I get (excerpts):

...
(==) MGA(0): Using AGP Mode 1x
...
[drm] drmAgpEnabled succeeded for AGP mode 1x
...

Any idea ???

By the way : this is to play Tribes2, which is a great game, but
too slow with my Matrox card (even with DRI), so I wonder if AGP
is involved...

My config :
PIII 667
256 Mb RAM
XFree86 4.0.3 / Woody / Gnome 1.4
Matrox G400
SoundBlaster AWE64

Thanks,

Dominique