I have a high DPI monitor next to a low DPI monitor and want to set the scaling of the high DPI monitor to 200%. However if I set the scaling to 200% in the Gnome settings, nothing happens and when I close the window, it always resets back to 100%. How can I make the settings stick? I also tried to use the gnome tweak tool for fractional settings but that applies to both monitors equally.
I use GNOME Shell 3.26.2 on Arch Linux 4.14.11-1 on X11.