Since this bug had been idle for over 3 years and the upstream bug closed as fixed in Xorg 1.20 (1.20.0 actually), I think this should be closed as fixed in Ubuntu 20.04 which shipped with Xorg 1.20.8. The new issue in comment #99 is being tracked in bug 2004104.
** Changed in: xorg-server (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1580123 Title: xrandr --scale (again) confines mouse to native solution To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/1580123/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp