Hardware used
3 x Benq 24“ screens
1 x DiamondDigital 19” screen
2 x Nvidia Geforce 8400 GS PCI-E x16 cards
Backup your /etc/X11/xorg.conf before you start.
I found it easier if you use all the same monitors and resolution.
Put the following into your /etc/X11/xorg.conf
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 1.0 (buildd@yellow) Fri Apr 9 11:51:21 UTC 2010
Section "ServerLayout"
Identifier "TriHead"
Screen 0 "Screen0" 3200 0
Screen 1 "Screen1" 1280 0
Screen 2 "Screen2" 5120 0
Screen 3 "Screen3" LeftOf "Screen1"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "1" # Enable xinerama on the whole
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "BENQ E2400HD"
HorizSync 30.0 - 83.0
VertRefresh 55.0 - 85.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
ModelName "BENQ M2400HD"
HorizSync 30.0 - 83.0
VertRefresh 55.0 - 85.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor2"
VendorName "Unknown"
ModelName "CRT-1"
HorizSync 30.0 - 83.0
VertRefresh 55.0 - 85.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor3"
VendorName "Unknown"
ModelName "NVT Novatek 563D"
HorizSync 30.0 - 80.0
VertRefresh 50.0 - 75.0
EndSection
Section "Device"
# Use lscpi | grep VGA to get the BusID
# Note the Screen numbers
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400 GS"
BusID "PCI:3:0:0"
Screen 0
EndSection
Section "Device"
# A device for each screen
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400 GS"
BusID "PCI:3:0:0"
Screen 1
EndSection
Section "Device"
Identifier "Device2"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400 GS"
BusID "PCI:4:0:0"
Screen 0
EndSection
Section "Device"
Identifier "Device3"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400 GS"
BusID "PCI:4:0:0"
Screen 1
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "NoLogo" "True"
# Option "DoubleBuffer" "True"
Option "TripleBuffer" "True"
Option "TwinView" "0"
Option "metamodes" "DFP: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "CRT: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
# Removed Option "metamodes" "nvidia-auto-select +0+0"
# Removed Option "metamodes" "1920x1080 +0+0"
Identifier "Screen2"
Device "Device2"
Monitor "Monitor2"
DefaultDepth 24
Option "NoLogo" "True"
# Option "DoubleBuffer" "True"
Option "TripleBuffer" "True"
Option "TwinView" "0"
Option "metamodes" "CRT: 1920x1080 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen3"
Device "Device3"
Monitor "Monitor3"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "DFP: 1280x1024 +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection