Comment 39 for bug 1181666

Same issue as LuisC on 17.10, but using xorg.

Also, my keyboard stops working, so I can't press super key.

However, the gnome-shell top bar and the Ubuntu Dock still accept inputs.

As a result, I am able to launch programs.

I can also kill programs by clicking on the window's "X" (close) in Activities (overview) mode, but the window controls (close, minimize, and maximize) do not accept any form of input.

Restarting solves the problem. Loging-out and loging back in does not correct the problem. Note that I am able to use the mouse and keyboard on the GDM screen, just like I am able to interact with the topbar and Ubuntu Dock.