If you're using the NVIDIA proprietary driver then the primary monitor (the one the launcher appears on) is chosen by the "TwinViewXineramaInfoOrder" option in /etc/X11/xorg.conf, which I think you change by ticking the primary monitor box in the NVIDIA control panel.
Using the NVIDIA proprietary driver, xrandr and the Gnome Displays control panel are totally irrelevant. Thanks NVIDIA :P -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/742544 Title: Launcher is shown on the wrong screen in some multi-monitor setups To manage notifications about this bug go to: https://bugs.launchpad.net/ayatana-design/+bug/742544/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
