Display setting reset after reboot Ubuntu 20.04 Focal Fossa
Solution 1:
If you dig into the bug report you linked it seems clear that the only workaround for this at this moment is turning off fractional scaling or setting fractional scaling to 100%. I recommend that you subscribe to the aforementioned bug report so that you can be notified when a fix becomes available.
Solution 2:
I solved this by following command (I want Scale to be at 200%):
gsettings set org.gnome.desktop.interface scaling-factor 2
Let me know if this has solved your issue!