From: Gary Gapinski on
After installing openSUSE 10.3 and not getting everything working
exactly right using nvidia-settings, I made some minor tweaks to
xorg.conf to get a two-card four-screen layout working. nvidia-settings
could get no closer than a 2x2 layout (seems it would not enable Xinerama).

Here's the xorg.conf:

Section "ServerLayout"
Identifier "Layout[all]"
Screen 0 "Screen0" 0 1024
Screen 1 "Screen1" RightOf "Screen0"
Screen 2 "Screen2" Above "Screen0"
Screen 3 "Screen3" RightOf "Screen2"
InputDevice "Keyboard[0]" "CoreKeyboard"
InputDevice "Mouse[1]" "CorePointer"
Option "Xinerama" "on"
EndSection

Section "Files"
InputDevices "/dev/gpmdata"
InputDevices "/dev/input/mice"
FontPath "/usr/share/fonts/misc:unscaled"
FontPath "/usr/share/fonts/local"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/Type1"
FontPath "/usr/share/fonts/URW"
FontPath "/usr/share/fonts/Speedo"
FontPath "/usr/share/fonts/PEX"
FontPath "/usr/share/fonts/cyrillic"
FontPath "/usr/share/fonts/latin2/misc:unscaled"
FontPath "/usr/share/fonts/latin2/75dpi:unscaled"
FontPath "/usr/share/fonts/latin2/100dpi:unscaled"
FontPath "/usr/share/fonts/latin2/Type1"
FontPath "/usr/share/fonts/latin7/75dpi:unscaled"
FontPath "/usr/share/fonts/baekmuk:unscaled"
FontPath "/usr/share/fonts/japanese:unscaled"
FontPath "/usr/share/fonts/kwintv"
FontPath "/usr/share/fonts/truetype"
FontPath "/usr/share/fonts/uni:unscaled"
FontPath "/usr/share/fonts/CID"
FontPath "/usr/share/fonts/ucs/misc:unscaled"
FontPath "/usr/share/fonts/ucs/75dpi:unscaled"
FontPath "/usr/share/fonts/ucs/100dpi:unscaled"
FontPath "/usr/share/fonts/hellas/misc:unscaled"
FontPath "/usr/share/fonts/hellas/75dpi:unscaled"
FontPath "/usr/share/fonts/hellas/100dpi:unscaled"
FontPath "/usr/share/fonts/hellas/Type1"
FontPath "/usr/share/fonts/misc/sgi:unscaled"
FontPath "/usr/share/fonts/xtest"
FontPath "/opt/kde3/share/fonts"
EndSection

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

Section "ServerFlags"
Option "AllowMouseOpenFail" "on"
EndSection

Section "InputDevice"
Identifier "Keyboard[0]"
Driver "kbd"
Option "Protocol" "Standard"
Option "XkbLayout" "us"
Option "XkbModel" "ltcd"
Option "XkbRules" "xfree86"
EndSection

Section "InputDevice"
Identifier "Mouse[1]"
Driver "mouse"
Option "Buttons" "9"
Option "Device" "/dev/input/mice"
Option "Name" "ImExPS/2 Logitech Explorer Mouse"
Option "Protocol" "explorerps/2"
Option "Vendor" "Sysp"
Option "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Samsung SyncMaster"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Samsung SyncMaster"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
EndSection

Section "Monitor"
Identifier "Monitor2"
VendorName "Unknown"
ModelName "Samsung SyncMaster"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
EndSection

Section "Monitor"
Identifier "Monitor3"
VendorName "Unknown"
ModelName "Samsung SyncMaster"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
EndSection

Section "Device"
Identifier "Videocard0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 6800 XT"
BusID "PCI:5:0:0"
Screen 0
EndSection

Section "Device"
Identifier "Videocard1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 6800 XT"
BusID "PCI:5:0:0"
Screen 1
EndSection

Section "Device"
Identifier "Videocard2"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 6800 XT"
BusID "PCI:2:0:0"
Screen 0
EndSection

Section "Device"
Identifier "Videocard3"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 6800 XT"
BusID "PCI:2:0:0"
Screen 1
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 16
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard1"
Monitor "Monitor1"
DefaultDepth 16
EndSection

Section "Screen"
Identifier "Screen2"
Device "Videocard2"
Monitor "Monitor2"
DefaultDepth 16
EndSection

Section "Screen"
Identifier "Screen3"
Device "Videocard3"
Monitor "Monitor3"
DefaultDepth 16
EndSection