Hello there, how do I allow volume control via the Fn VolumeUp/Down keys on my netbook before I login?

Now they don't work until after login and this can be embarassing, for example when I wake up the netbook from suspend in a silent area, maybe during a conference, and suddenly music is playing loudly. I can not quickly shut it up with the volume key, but I first have to enter my password and wait for the login to complete.


Using Ubuntu 12.04 with Gnome 3 and Unity on an Atom 1,6 GHz netbook