Xorg.conf 4 monitors (screen0 and screen1) cloned from monitor 1&2 to monitor 3&4

Hello,

I got a Nvidia quadro p620 with 4 mini display port outputs.
I’m working with scientific linux driver version 460.23

I try to clone 2 desktops (monitor 1 & 2) to (monitor 3 & 4)

I was trying around in xorg.conf with twinview clone but as soon as clone is activated my second Screen section is ignored.

I was able to clone the first screen (screen 0) but the monitors with screen 1 will get no signal as soon as clone mode is active.

Thanks for tips and suggestions.
Best regards

Kitsab

Basically, you should create a ZaphodHead setup with two monitors each and then use either xrandr or the display manager of the running desktop to clone each.

1 Like

Hello,

thank you for this tip I was not aware of this kind of solution, will this be supported with Nvidia driver. I’ll give this a try on Monday.

Thanks and best regards

Kitsab

Hello,

I was able to solve this - it wasn’t zaphodheads. I think I should have explained better what I was planning to do. Zaphodheads generate seperat seats.
I just want to clone two monitors of a 2-screen wide desktop.

The lines:

Option         "metamodes" "DP-3: 1280x1024 +0+0"
Option         "metamodes" "DP-1: 1280x1024 +0+0"
were changed to to get the signals on the outputs DP-5 and DP-7 as well.
Option “metamodes” “DP-3: 1280x1024 +0+0, DP-5: 1280x1024 +0+0”
Option “metamodes” “DP-1: 1280x1024 +0+0, DP-7: 1280x1024 +0+0”

Final code:

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-3"
    Option         "metamodes" "DP-3: 1280x1024 +0+0, DP-5: 1280x1024 +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "DP-1: 1280x1024 +0+0, DP-7: 1280x1024 +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

The result is:

__________________________
|             |          |
|   DP-3      |  DP-1    | 
|   Screen0   |  Screen1 | 
|             |          |
|_____________|_________ | 
|             |          |
|    DP-5     |   DP-7   | 
|    Clone of | Clone of | 
|    Screen0  | Screen1  |
|_____________|_________ | 


Best regards

Kitsab