I have the same problem with 15.04 main screen is a Lenovo Thinkpad e120 external display is on HDMI, is an older Samsung 16:10 lcd screen
I have a temporary fix for that, which consists in pressing super+P key - the displays will cycle through configuration possibilities (use both or display only 1 and set the resolution) - when doing so the displays will redraw the windows and the window decorations will reapper it's a bit annoying because I have to do this at every single startup -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1307559 Title: Window decorations not drawn on external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1307559/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs