I think you can reset the unity and see if this works... Looks like a bug, but i got it when I reset the Unity.
Follow below command. unity --reset Thanks, Amit -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/775757 Title: Close Button Disappear From Unity Top Panel -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
