while this might work in KDE, it's not going to help if F*BillGAteS is running another GUI. try typing
As far as sound there could be a couple of reasons for this not to work, but to start you need to know what sound card you have, then type lsmod and see if you see it in there. Sometimes it works but sound is not turned on. Try going to sound control (a little wrench icon on panel if using KDE) then sound and media then sound system then enable sound system. once that is done go to kmix in the multimedia tab and configure your sound.