I have an Acer Aspire 4330 with Ubuntu installed. The keyboard has a few extra buttons, some of which are accessed by the Fn button, and looks like the one in this image: here, though in addition to those shown are 4 buttons on the side: wifi toggle, vol +, vol -, and what I guess is bluetooth toggle...

-but what my question is: is how could I enable the additional buttons in Ubuntu? In particular Fn+ f1, f2, f3, home, pg up, pg down, end; as well as the euro and dollar buttons by the arrows, and the acer 'e' button, don't function, nor am I sure if the bluetooth button does anything, as I have no experience with bluetooth (and have been unable to successfully use it with this laptop).

In addition to the above, my down button stopped working the other day, does anyone know if there is a way I can determine whether or not that is hardware-side? X/

Assistance appreciated, thank you.