Display Problem

[Allen P Holtz <Allen P Holtz grc nasa gov>]

Hi,

   I'm new to Linux and I'm trying to install RH 6.1 on a Dell
Workstation 410.  It is a dual 500Mhz Pentium II system with
128MB of RAM.  The video card is a Diamond Fire GL 1000P
from 3Dlabs using Permedia2 chipsets.  The monitor that I'm
using is also from Dell.  It is a 21" M1110.  I don't know who
originally manufactured the monitor.

The problem:  The Install goes fine until it's time to configure the
monitor.  The video card is detected.  Unfortunately, the monitor
does not appear on the list.  No problem.  I choose the custom
option.  This does not go well.  I have the manual for the monitor.
The monitor is capable of doing 1600x1200 at 70Hz.  There are
no real matches for the horizontal sync so I choose one that is
closest but not over (Either 40-150 or 50-100).  Then it's time for the
autoprobe.  Occasionally I get an error stating that there was a
problem with the clock.  Most of the time it's okay.  I finally get it
working and reboot.  The problem is it looks like the resolution
is 800x600.  On a 21" screen, that is obnoxious.  I can't figure
out what is wrong.  I've run Xconfigurator and cannot get it to
a better resolution.  Any help is appreciated.

Thanks,

Allen