I'm using Ubuntu 20.04 with a 2160p TV on my new HTPC with AMD Ryzen 3200g APU.
To sync the display refresh rate to the video being played I have the xrandr.lua script for mpv which just runs xrandr, for example:
xrandr --output HDMI-A-0 --mode 3840x2160 --rate 24
That works fine except whenever the xrandr command is run (also when I do it manually) it resets Gnomes display scaling setting back to 100%, which is suboptimal on a TV a distance away, I can't read any text.
Is there a way to force Gnome to always use 200% scaling by default, no matter what?
--scale
option fromxrandr