Same deal here. 14.04.1, fully updated, etc. Running on a Dell Latitude E7440 that even came with Ubuntu on it. If I plug in a second display after the system is booted, the top panel on the secondary monitor goes transparent. If I boot the system up with the monitor plugged in, no issue.
If I issue a restart to unity (ALT + F2, unity --replace), then it comes back fine. This does not happen if your panel is default transparency, though it does happen if the transparency of the panel has been adjusted (at least in my experience). ** Attachment added: "dualscreen2.png" https://bugs.launchpad.net/unity/+bug/1330405/+attachment/4298631/+files/dualscreen2.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1330405 Title: Unity top panel turns transparent with dual screen. Garbage shadow leftovers appear. To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1330405/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs