I did install Ubuntu 10.04 over ten years ago from a CD-Rom. Maybe I once uninstalled the permanent dock, maybe it never was the in 16.04 or 18.04.
I did install the dock, but that changes nothing in regard to my problem. Attached is the log file. ** Attachment added: "jourctrl -b 0 > log" https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1926088/+attachment/5492668/+files/log -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1926088 Title: Appearance: Window colors selection does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1926088/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs