[trendia]

You can achieve fractional scaling by first setting Gnome hidpi to an integer value and then adjusting the screen with xrandr [0]. It's not great, but it works.

Source: I have a 4K display and no problems

[0] https://wiki.archlinux.org/index.php/HiDPI#GNOME

[symlinkk]

Yes I'm aware of that, it's a poor "solution" that's more like a hack. It renders everything at twice the resolution you need and then scales it down, which is awful for battery life on laptops. And it's difficult to do, barely anyone understands what a command like this does:

xrandr --output eDP-1 --auto --output HDMI-1 --auto --panning 3840x2160+3840+0 --scale 2x2 --right-of eDP-1