Please attach your /var/log/Xorg.0.log and the output of `lspci -vvnn` and `xrandr`. This is an xrandr issue rather than gnome-display-properties. It sort of sounds like it's looking at the available resolutions from each display and selecting the lowest common denominator.
Please attach your /var/log/Xorg.0.log and the output of `lspci -vvnn` and `xrandr`. This is an xrandr issue rather than gnome-display- properties. It sort of sounds like it's looking at the available resolutions from each display and selecting the lowest common denominator.