nVidia TwinView (or Xinerama/xRandR) Triple Head setup - Help?

[audiomick]

Thanks for that browneej.

I would like to rotate one of my two monitors. Your xorg.conf might contain the clue I need

[jstapels]

I wanted to add that I went through the exact same problems and ended up with the exact same solution (Xinerama on all three monitors). The performance is horrible so I tried using Twinview + Xinerama because I heard that it makes things a little better. However, when I do that it appears that the nVidia driver doesn't advertise the individual sizes of the Twinview'd screens and I'm stuck with a gnome-panel stretching across and windows maximizing across both.

xRandR 1.3 never ended up delivering support for multiple GPUs and it doesn't look like 1.4 will have that support either.

My only hope at this point is that nVidia will find a way to offer a TripleView for linux as part of their 3D Vision driver support, although it's probably unlikely this would be supported back to 8800GT series.

If anyone has come across a solid way to use three monitors in linux (w/ two gpus), please share.

[phrac]

Here's my xorg.conf file generated by nvidia-settings. This is a triple head setup with two different nvidia cards, 2 22" monitors and 1 24" monitor.
Screen0 is my 24" monitor and to the left and right are the 22" monitors. I don't run gnome or KDE but it works great in awesome wm.

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 1680 0
    Screen      1  "Screen1" LeftOf "Screen0"
    Screen      2  "Screen2" RightOf "Screen0"
    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     "Monitor2"
    VendorName     "Unknown"
    ModelName      "Acer AL2216W"
    HorizSync       30.0 - 82.0
    VertRefresh     56.0 - 76.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "AOC 2436"
    HorizSync       30.0 - 80.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "Monitor1"
    VendorName     "Unknown"
    ModelName      "Acer AL2216W"
    HorizSync       30.0 - 82.0
    VertRefresh     56.0 - 76.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device2"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 9800 GT"
    BusID          "PCI:2:0:0"
    Screen          1
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 9800 GT"
    BusID          "PCI:2:0:0"
    Screen          0
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 210"
    BusID          "PCI:3:0:0"
EndSection

Section "Screen"
nvidia-auto-select +0+0"
    Identifier     "Screen2"
    Device         "Device2"
    Monitor        "Monitor2"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "DFP-1: nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
nvidia-auto-select +0+0"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "DFP-0: nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
select +0+0"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection