High DPI GDM login screen scaling should use the gnome-settings scale factor
To scale the GDM login screen properly:
dbus-launch gsettings set org.gnome.desktop.interface scaling-factor 2
This should not be necessary if GDM would just use gnome-settings scale factor. Maybe gnome-settings can be altered to set this value too. As a user i expect the login screen to scale exactly as gnome-shell
Related: #2591
Edited by Julius von Kohout