Arch Linux

Skilowi

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Registered: 2025-08-03

Posts: 21

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[SOLVED] Mirroring one screen in dual screen setup.

Hello. I have Arch Linux with X11 and Xfce4 installed with archinstall.
I have two monitors, one is 1920x1080 @ 60Hz and second is 1280x1024 @ 75 Hz rotated 90 degrees,
Both are on DisplayPort of my GPU.
My GPU has also HDMI output. My second computer had PCIe card with ability to capture the video signal from HDMI.
When I connect first computer with HDMI cable to the capture card it appears as 3rd 1920x1080 monitor.

Can I somehow replicate 1st monitor to the third? So the capture card will record my main monitor.
I couldn't find anything in Display settings in Xfce4, neither in nvidia-settings. Can I somehow pull it off with xrandr?
In Xfce4 Display settings there is same image on all screens settings but it won't work with my side monitor.

Last edited by Skilowi (2025-10-26 09:41:21)

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Moron from Poland necromancing old ThinkPads and Computers.
I also learn Mechatronics.

Skilowi

Member

Registered: 2025-08-03

Posts: 21

Website

Re: [SOLVED] Mirroring one screen in dual screen setup.

https://unix.stackexchange.com/question … ndr#371796

This helped! ^

xrandr --output HDMI-0 --same-as DP-0

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Moron from Poland necromancing old ThinkPads and Computers.
I also learn Mechatronics.