Try to insert the resolution manually.
I do not know if it can be done in RH 9.0 but in RH EL and in Debian it is possible and it works duhhh.
As root do the following:
Got to your XF86Config file
vi /etc/X11/XF86Config
edit the file to your needs.
hugol# cat /etc/X11/XF86Config-4
# XF86Config-4 (XFree86 X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the XF86Config-4 manual page.
# (Type "man XF86Config-4" at the shell prompt.)
#
# This file is automatically updated on xserver-xfree86 package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xfree86
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following commands as root:
#
# cp /etc/X11/XF86Config-4 /etc/X11/XF86Config-4.custom
# md5sum /etc/X11/XF86Config-4 >/var/lib/xfree86/XF86Config-4.md5sum
# dpkg-reconfigure xserver-xfree86
Section "Screen"
Identifier "Default Screen"
Device "Generic Video Card"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1280x800" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1280x800" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1280x800" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1280x800" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x800" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x800" "800x600" "640x480"
EndSubSection
EndSection
save and exit
Now configure your desktop.
Hope it works
