Guake is a dropdown terminal made for the GNOME desktop environment. Guake's style of window is based on an FPS game, and one of its goals is to be easy to reach. Recently, my new Ubuntu 18.04 LTS is meeting a bug. When I was trying to exit a shell, the Guake would hang over there, which makes this application even unable to use.

A few bug reports could be found on the network, like here, here, and here. It started around 1 year ago. However, my latest package does still meeting the same issue.

Finally, I found a solution that works for my system.

Bash
sudo apt install --reinstall libutempter0

Hoping it helps.

Updated 2021:

Dear dudes, I really delight to hear this small note viewed by you and may make a few tiny help. However, it is 2021, and I still could get your response. I do respect the bug, which is a REAL TOUGH GUY!