I’m running KDE wayland with proprietary Nvidia drivers on CachyOS, so far I haven’t found a way to set a custom monitor refresh rate, on windows I could use the Nvidia control panel to make one (going from 60hz to 75hz). kscreen-doctor doesn’t let you set “unsupported” modes, the kernel launch option of video=1920x1080@75 didn’t work, somehow. So how would I do it?
Are you referring to monitor refresh rate overclocking?
This would not be something you do with a kernel launch option, or DE setting.
You need to be doing stuff with the display server, which would be X11 or Wayland.
Yes, but all it entails is setting an output mode with a higher refresh rate than the default one. I am using wayland, though I haven’t found a way to set a mode that isn’t reported by the monitor itself.
That is what xrandr allows you to do on X11, create and set display modes that aren’t reported by the monitor.
EDID editing is basically replacing the data reported by the monitor, which also allows you to add display modes it doesn’t report itself. This is the only way to do what you are looking for on wayland.
You can either switch to X11, and use xrandr, or create an EDID file with the display mode you want, and have it load on boot. Doing that is unfortunately not simple.