I am running Manjaro on a Dell XPS 15 7590 and recently switched from the Gnome distro to the Plasma one. I was previously able to roughly control my OLED screen brightness by using icc-brightness-gnome-git from the AUR. Unfortunately this no longer works on Plasma.
I have found icc-brightness-kde on git, but it isn’t available from the official repositories or the AUR which makes me wary of it and the only instructions given on the git page are for Debian based distros.
I did find some instructions for remapping the brightness controlling function keys to scripts that would run appropriate xrandr commands, but those instructions were written for Ubuntu users and I was unable to successfully convert them for my needs with my limited knowledge.
Does anyone know how to make either of these work, or are there any other (hopefully better) solutions that I am unaware of?