Same behaviour on a Ubuntu 15.10 VMWare VM running on Windows 7. No "DisplayLink" USB display adapter present. Closing the window (clicking on X) makes the window disappear. Kill -1 of the unity-settings-daemon makes it reappear.
C. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1402454 Title: Black window in middle of screen after log in. (related to DisplayLink adapter) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-settings-daemon/+bug/1402454/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs