"Single" and "extended" display modes sound like different configurations. You need to set each up separately with your preferred settings in gnome-control-center, and save the settings of each. If you have done that, and especially if you have verified it's been saved in ~/.config/monitors.xml then this is a bug.
Does it only happen in Wayland sessions? ** Tags added: multimonitor ** Changed in: mutter (Ubuntu) Status: New => Incomplete ** Also affects: gnome-shell (Ubuntu) Importance: Undecided Status: New ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1905084 Title: Fractional scaling of external monitor and monitor positioning are lost when switching between single- and extended-display modes using the keyboard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1905084/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs