How to change the resolution in SDDM

When using a laptop with a 4K screen, SDDM is very small and hard to see. Once I login, I have the resolution set to 1920x1080 and everything looks good.

I’ve tried going into SDDM settings and clicked “Apply Plasma Settings” and that didn’t work. I also tried enabling HiDPI and that didn’t work either.

Does anyone have any other suggestions?

You may use an xrandr command to set SDDM display properties.

Use SDDM relevant configuration.
Read the tip in this section.


I was able to do it using the xrandr command, thanks.