Your Xorg logs are showing: [ 4864.686] (WW) modeset(0): hotplug event: connector 93's link-state is BAD, tried resetting the current mode. You may be leftwith a black screen if this fails...
where connector 93 is the DisplayPort. Please try a different monitor cable, or just replugging it. ** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu) ** Changed in: xorg-server (Ubuntu) Status: New => Incomplete -- 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/1853221 Title: Two monitors displaying same image To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1853221/+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