I had the same issue in Ubuntu 14.04.1 LTS.
Another situation to reproduce the problem is: on the keyboard, press the Calculator Button (keyboard shortcut). It'll open in background.
I fixed this problem with the answer available at http://askubuntu.com/a/130349/154850.
Hope to help someone else.
I had the same issue in Ubuntu 14.04.1 LTS. askubuntu. com/a/130349/ 154850.
Another situation to reproduce the problem is: on the keyboard, press the Calculator Button (keyboard shortcut). It'll open in background.
I fixed this problem with the answer available at http://
Hope to help someone else.