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 Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs