I have wasted two years trying to get a six screen setup working.
What I have
3 GeForce GTX 550 Ti cards
What I use:
• LXDE with KDM
• Nvidia 310.14 driver
Run each screen as separate x display.
I could only get twinview working for two displays.
Use xinerama to create one big desktop.
What works:
• spanned wallpaper one panel for all the screens (one big desktop)
• maximise window over one screen, not all six
Not working:
• 3D hardware acceleration on the desktop (I can actually play some games with a bit of tweaking)
• xrandr generates errors
• compiz is right out
• unity had horrible multi-monitor support the last time I checked (anything more than two screens and it goes pear shaped.
My xorg.conf file:
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 310.14 (buildd@komainu) Tue Oct 16 22:20:47 UTC 2012
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" 0 1080
Screen 2 "Screen2" 1920 0
Screen 3 "Screen3" 1920 1080
Screen 4 "Screen4" 3840 0
Screen 5 "Screen5" 3840 1080
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "1" EndSection
Section "Files" 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 "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd" EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Samsung SMB2330H"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS" EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Samsung SMB2330H"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS" EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor2"
VendorName "Unknown"
ModelName "Samsung SMB2330H"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS" EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor3"
VendorName "Unknown"
ModelName "Samsung SMB2330H"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS" EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor4"
VendorName "Unknown"
ModelName "Samsung SMB2330H"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS" EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor5"
VendorName "Unknown"
ModelName "Samsung SMB2330H"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS" EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 550 Ti"
BusID "PCI:2:0:0"
Screen 0 EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 550 Ti"
BusID "PCI:2:0:0"
Screen 1 EndSection
Section "Device"
Identifier "Device2"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 550 Ti"
BusID "PCI:1:0:0"
Screen 0 EndSection
Section "Device"
Identifier "Device3"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 550 Ti"
BusID "PCI:1:0:0"
Screen 1 EndSection
Section "Device"
Identifier "Device4"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 550 Ti"
BusID "PCI:3:0:0"
Screen 0 EndSection
Section "Device"
Identifier "Device5"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 550 Ti"
BusID "PCI:3:0:0"
Screen 1 EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "metamodes" "DFP-0: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-2"
Option "metamodes" "DFP-2: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection EndSection
Section "Screen"
Identifier "Screen2"
Device "Device2"
Monitor "Monitor2"
DefaultDepth 24
Option "Stereo" "0"
Option "metamodes" "DFP-0: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection EndSection
Section "Screen"
Identifier "Screen3"
Device "Device3"
Monitor "Monitor3"
DefaultDepth 24
Option "Stereo" "0"
Option "metamodes" "DFP-2: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection EndSection
Section "Screen"
Identifier "Screen4"
Device "Device4"
Monitor "Monitor4"
DefaultDepth 24
Option "Stereo" "0"
Option "metamodes" "DFP-0: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection EndSection
Section "Screen"
Identifier "Screen5"
Device "Device5"
Monitor "Monitor5"
DefaultDepth 24
Option "Stereo" "0"
Option "metamodes" "DFP-2: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection EndSection
Section "Extensions"
Option "Composite" "Enable" EndSection