That log appears to be from XFCE which you said does not exhibit the bug. Please do the 3-monitors test with gnome-shell, and run 'journalctl -f' there.
-- 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/1725836 Title: No more than 2 displays work simultaneously To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1725836/+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
