I have 4 screens hooked up to 2 identical Nvidia GPUs
In 10.04, I had it working flawlessly with Xinerama. But, after upgrading to 12.04, everything is screwed up. I installed GNOME shell cause I hate Unity. I use GNOME classic.
The closest I can get to working is TwinView and 2 X sessions but GPU2 shows a white desktop background, as soon as I enable Xinerama everything breaks and I have to start from scratch again.
Also depending on Ubuntu/Nvidia's mood nvidia-setting
will sometimes show only 1 GPU. Other times I get both and can continue with my setup.
The one working copy of xorg.conf
I used a mv
command (instead of cp
) on and lost my working backup
I got all 4 working again and Xinerama.
Here is my xorg.conf:
#xorg.conf
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 1024
Screen 1 "Screen1" Above "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
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 SyncMaster"
HorizSync 30.0 - 80.0
VertRefresh 55.0 - 75.0
Option "DPMS"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Samsung SyncMaster"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro FX 1800"
BusID "PCI:1:0:0"
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro FX 1800"
BusID "PCI:32:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "1"
Option "metamodes" "DFP-0: nvidia-auto-select +1920+0, DFP-1: nvidia- auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "TwinView" "1"
Option "metamodes" "DFP-1: nvidia-auto-select +1280+0, DFP-2: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection