Ubuntu: disable Alt to launch HUD
In Ubuntu (with Unity),
Alt launches the HUD. Fine. However, if you have a Windows in VirtualBox and you want to switch windows in the guest VM with
Alt+TAB, that damn HUD always appears in the host. How to disable it?
I found the solution here.
In short: top right corner, System settings… -> Keyboard -> Shortcuts tab -> Launchers. Assign a new key to “Key to show the HUD“, or disable it completely by pressing the Backspace.