ATI Rage 3D Pro AGP with X

["Matthew Myers" <mmyers@ourtownusa.net>]

Does anyone know how to successfully configure X to run with an ATI Rage 3D
Pro AGP?

When I try to run X it seems to start okay, but the screen is divided into
thirds vertically, and in each section I can only see the far right third of
the screen.  it scrolls, but show the same thing in each third instead of
covering the whole screen.

My Setup:
All of the following comes from the Official CD with no updates.
Debian Linux 1.3.1
XF86_Mach64 xserver

I have tried the Mach64 server from the CD and even downloaded the last
available libc5 version with the same results.  Please help me.