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#1 2021-01-13 08:47:22

RMTT
Member
Registered: 2020-04-07
Posts: 9

Two monitor with different scale on KDE (or other)

I have a built-in screen on my laptop, 2880x1800, 14 inch, and an external monitor, 20+ inch, 1920x1080, like this:

Monitors: 2
 0: +*eDP 2880/302x1800/188+0+0  eDP
 1: +DisplayPort-0 1920/641x1080/401+2880+215  DisplayPort-0

I'm using KDE now, and i found the KDE(X session) cannot give different scaling to different monitors. now i want using 200% scaling with built-in screen and 100% scaling with external monitor, i have tried the following methods:

  • Using wayland session, but some apps may broken on wayland or works incorrectly, and the Spectacle cannot capture are on wayland...

  • Using Gnome, same problems with KDE(wayland)

  • Using xrandr and disable kscreen, it works well, but the kwin seems broken sometimes, such as the cursor became some green pixels, the xrandr command like this:

    xrandr --dpi 192 --fbmm 5760x1800 --output eDP --mode 2880x1800 --scale 1x1 --pos 2880x0 --output DisplayPort-0 --mode 1920x1080 --scale 1.5x1.5 --pos 0x0

I'm using AMD R7 4800H with integrated vega 8, maybe have other ways to implement my goal? Using KDE(X session) is the best.
Any solutions will be appreciated.

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