fedora has had sound issues since fedora 8
a question ??
is your fedora 11 FULLY updated ? if not update it !!
the sound on the fedora install cd and dvd did not work for a lot of people ( me included) an update did fix it .
I have downloaded the Linux drivers but they wont install.
there is no driver to install in fedora
it is handled by "pulse audio" and "alsa "
hal will auto detect your sound card( or chip) and try to use the correct one .
if sound is not working you might think about using a distro that is NOT " Fix Or Repair Daily"( FORD)
You might also ( if you stay with fedora ) look at this guide page
"Fedora 11: Complete guide to fix PulseAudio and video/audio VLC Media Player issues "