You have been subscribed to a public bug: On a fresh install from at least Ubuntu 17.04 up to 18.10, when I change Settings->Dock->Show on to a specific monitor on a dual monitor setup, this setting gets flipped if I change the primary display in Settings->Devices->Displays->Primary Display.
For Example I have Monitor A and Monitor B After a fresh install Monitor A is primary with title bar, clock, etc. and the dock. If I change the dock to Show on Monitor B it moves as desired. But when I change Primary Display to Monitor B also, the dock immediately goes to Monitor A again. When I check the Show on setting it still displays Monitor B but it's actually on Monitor A. Selecting Monitor A will move the dock to Monitor B. Description: Ubuntu 18.04.1 LTS Release: 18.04 ** Affects: gnome-control-center (Ubuntu) Importance: Undecided Status: Incomplete -- Changing Primary DIsplay Flips Which Display Has The Dock https://bugs.launchpad.net/bugs/1800963 You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp