I don't know if it helps in any way, but today I found out some strange behaviour.
I usually start my applications by going into the K-Menu and enter some letters of the program name like "thun". Then when the application appears eg. thunderbird, I press enter and the app starts. When I start thunderbird from the k-menu in that way, it always opened on my external display. If I close it and then tried it to start in a shell by entering "thunderbird" <enter> it started on my builtin laptop display. I could do this about 3-5 times. (k-menu-search,command line) Then I started thunderbird via the k-menu in the normal way by selecting programs->internet->thunderbird and it started on the main display. Since that it starts the same way always on the main display no matter if started from the k-menu quick shortcut, the k-menu shortcut or from command line. Btw. kmail has similar strange beaviour. When started from the k-menu (search or programs) it starts in a resized window that stays on the bottom left of the main screen. When started from a shell prompt it starts a resized window that is located at the bottom right of the main screen. Maybe this information could help someone to step deeper into this problem. It is maybe possilbe that this is not only a thunderbird problem. I hope we can fix that somehow. I like using thunderbird at home. -- Thunderbird does not start when second display is missing https://bugs.launchpad.net/bugs/363983 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs