I still haven't managed to get sound working on my new HP Pavilion a1320y desktop with Fedora Core 4. Read a lot of suggestions in Fedora Forum without any luck so far.
Figured why not just upgrade to Fedora Core 5? So I did, with less than optimal results. The graphics went all haywire. Even the console graphics were unreadable. Guess the installation made some assumptions about my graphics card that aren't true.
Anyhow, Fedora Core 4 has been re-installed.
Help getting sound working greatly appreciated.