For everyone who has the same problem, this solution https://unix.stackexchange.com/questions/371793/how-to-duplicate- desktop-in-linux-with-xrandr/371796 worked for me.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1497806 Title: Mirrored display broken in Xubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1497806/+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