I have 4 monitors using NVidia GForce and only 3 work.
 

I am using the following configuration file: /etc/X11/xorg.conf:

Only three of the four monitors work. If I change anything I lose on of the monitors. There is a plasma tv that is the main monitor; I would like to change that if possible. The system also runs very slow when I have the three monitors enabled. I don't get any special effects. Do you have any advise on how to edit this file so that all four monitors and compiz works.

I am using a Nvidia GeForce 8800 and an Nvidia GeForce 77000 as my video cards. Is their a reason why a video card that supports dual monitors would only show one of the monitors. If I edit the config file the three monitors that work may change which leads me to believe that all of the monitors work. Now, if I could only get XWindows to understand that I have four monitors.

I just downloaded the newest GeForce driver from Nvidia. I am using Fedora 8 64bit Edition and I have a dual opteron system.

# Xorg configuration created by system-config-display

Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
Screen 2 "Screen2" RightOf "Screen1"
Screen 3 "Screen3" RightOf "Screen2"
InputDevice "Keyboard0" "CoreKeyboard"
Option "AIGLX" "true"
Option "Xinerama" "on"
Option "Clone" "off"
EndSection

Section "Files"
EndSection

Section "Module"
Load "glx"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "record"
Load "freetype"
Load "type1"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us+inet"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1600x1200"
HorizSync 31.5 - 64.0
VertRefresh 56.0 - 65.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1600x1200"
HorizSync 31.5 - 56.0
VertRefresh 56.0 - 65.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor2"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1600x1200"
HorizSync 31.5 - 56.0
VertRefresh 56.0 - 65.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor3"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1600x1200"
HorizSync 31.5 - 56.0
VertRefresh 56.0 - 65.0
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard1-Output0"
Driver "nvidia"
VendorName "Videocard vendor"
BoardName "NVIDIA GeForce 8800"
Option "XAANoOffscreenPixmaps" "true"
Option "TripleBuffer" "true"
Option "RenderAccel" "true"
BusID "PCI:5:0:0"
EndSection

Section "Device"
Identifier "Videocard1-Output1"
Driver "nvidia"
VendorName "Videocard vendor"
BoardNAme "NVIDIA GeForce 8800"
Option "XAANoOffscreenPixmaps" "true"
Option "TripleBuffer" "true"
Option "RenderAccel" "true
BusID "PCI:5:0:0"
Screen 1
EndSection

Section "Device"
Identifier "Videocard0-Output0"
Driver "nvidia"
VendorName "Videocard vendor"
BoardName "nVidia Corporation G72 [GeForce 7300 LE]"
Option "XAANoOffscreenPixmaps" "true"
Option "TripleBuffer" "true"
Option "RenderAccel" "true"
BusID "PCI:4:0:0"
EndSection

Section "Device"
Identifier "Videocard0-Output1"
Driver "nvidia"
VendorName "Videocard vendor"
BoardName "nVidia Corporation G72 [GeForce 7300 LE]"
Option "XAANoOffscreenPixmaps" "true"
Option "TripleBuffer" "true"
Option "RenderAccel" "true"
BusID "PCI:4:0:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0-Output1"
Monitor "Monitor0"
DefaultDepth 24
Option "AddARGBGLXVisuals" "true"
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1600x1200"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard0-Output0"
Monitor "Monitor1"
DefaultDepth 24
Option "AddARGBGLXVisuals" "true"
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1600x1200"
EndSubSection
EndSection

Section "Screen"
Identifier "screen2"
Device "Videocard1-Output0"
Monitor "Monitor2"
DefaultDepth 24
Option "AddARGBLXVisuals" "true"
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1600x1200"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen3"
Device "Videocard1-Output1"
Monitor "Monitor3"
DefaultDepth 24
Option "AddARGBLXVisuals" "true"
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1600x1200"
EndSubSection
EndSection

Section "Extensions"
Option "Composite" "Enable"
EndSection

Just to say hello...
 

Woah! I saw you were a newbie (me too), so I thought I'd say hello. Didn't realize you were so well setup and knowledgeable! This is a great site and someone will probably answer you, at the latest, 24 hours. Welcome to the forums.

Roboboy

shouldn't you have a


Screen 1
EndSection

for

Section "Device"
Identifier "Videocard0-Output1"


?