Ok, I found the problem: HUD only works if you make use of the global menu.
As I did not like the global menu on my 24 inch screen, I removed the package. That also leaves HUD inoperable as the commands for HUD are read from the global menu (https://bugs.launchpad.net/unity/+bug/975274).
Ok, I found the problem: HUD only works if you make use of the global menu.
As I did not like the global menu on my 24 inch screen, I removed the package. That also leaves HUD inoperable as the commands for HUD are read from the global menu (https:/ /bugs.launchpad .net/unity/ +bug/975274).
But perhaps a solution is on it's way:
https:/ /bugs.launchpad .net/unity/ +bug/682788
I will retry it later.