The problem appears to be in the dash/dock extension you are using which doesn't seem to be the regular Ubuntu one. So this bug is invalid for mutter.
If you can tell us what the name of the extension is then we might be able to tell you where to look for help. ** Changed in: mutter (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1889444 Title: Internal display keeps being primary even the settings set external display as primary To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1889444/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs