I am currently using Ubuntu 7.10 - the Gutsy Gibbon, I will be upgrading later on.

The issue I am having is...
I have a Video/Mouse/Keyboard switch, I am building a new PC which will be used on the other side of that switch. It allows one mouse, keyboard, and monitor to be used on two computers (can switch between them).

The monitor is a Mitsubishi Diamond Plus 200.
When connected directly to the computer, I have no issues, I am able to select a variety of resolutions.
When connected through the switch, I only get an option of 640x480 resolution. I'm assuming there is some form of auto-detection at play that can't see the monitors capabilities through the switch.

I am wondering if there is a way to disable the auto-detection, and force multiple resolutions to be available again.

My current xorg.conf is as follows...
# xorg.conf (xorg 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 xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
EndSection

Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "true"
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "stylus"
Option "Device" "/dev/input/wacom"
Option "Type" "stylus"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "eraser"
Option "Device" "/dev/input/wacom"
Option "Type" "eraser"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
EndSection

Section "InputDevice"
Driver "wacom"
Identifier "cursor"
Option "Device" "/dev/input/wacom"
Option "Type" "cursor"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
EndSection

Section "Device"
Identifier "nVidia Corporation NV34 [GeForce FX 5200]"
Driver "nvidia"
Busid "PCI:1:0:0"
Option "AddARGBVisuals" "True"
Option "AddARGBGLXVisuals" "True"
Option "NoLogo" "True"
EndSection

Section "Monitor"
Identifier "NSH1117K"
Option "DPMS"
EndSection


Section "Screen"
Identifier "Default Screen"
Device "nVidia Corporation NV34 [GeForce FX 5200]"
Monitor "NSH1117K"
Defaultdepth 24
SubSection "Display"
Modes "1800x1440" "1600x1200" "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "Default Layout"
screen "Default Screen"
Inputdevice "Generic Keyboard"
Inputdevice "Configured Mouse"

# Uncomment if you have a wacom tablet
# InputDevice "stylus" "SendCoreEvents"
# InputDevice "cursor" "SendCoreEvents"
# InputDevice "eraser" "SendCoreEvents"
EndSection
Section "Module"
Load "glx"
EndSection
As you can see, I'm using an NVidia GeForce FX 5200, old, but still works well

Any options as to how I can force resolutions above 640x480 to be used when the video is connected through the switch?