Comment 44 for bug 1870736

I have a Dell u3219q 32" and Dell p4317q with this issue. I'm trying to set 150% on the 32" and 125% on the 43", but it just goes to 200% and or goes blank. And things reset after every reboot, i.e. scaling goes wrong, monitor positioning changes, etc.

My workaround is to set fractional scaling on and 200% on both monitors, then go to the nvidia settings -> xserver display configuration -> advanced... and set the following:

32"
ViewPortIn 5120x2880
ViewPortOut 3840x2160+0+0
Panning: 5120x2880

43"
ViewPortIn 5760x3240
ViewPortOut 3800x2137+20+11 (or just 3840x2160+0+0 if you don't need underscan)
Panning: 5760x3240

This gets the scaling as near as possible, but it resets after every reboot even if you save it in the /etc/X11/xorg.conf.