Could those having this issue add their journalctl log from a session where they try to connect the other monitor? And also give details of the video cards/drivers you use and what screen are connected and using what ports/adaptors/etc?
** Changed in: libxrandr (Ubuntu) Importance: Undecided => High ** Changed in: libxrandr (Ubuntu) Status: Confirmed => Incomplete ** Package changed: libxrandr (Ubuntu) => xorg-server (Ubuntu) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libxrandr in Ubuntu. https://bugs.launchpad.net/bugs/1771185 Title: Secondary monitor not connecting in 18.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1771185/+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