I really appreciate you replying since no one else has, but I'm pretty sure this isn't just a pulseaudio misconfiguration issue.
If I had the wrong audio device selected, I would expect no sound at all. Similarly, if I had the levels wrong or the volume off, I'd also expect no sound. But instead, I get a short click or pop when a sound should be played.
It really feels more like a bug snuck into the driver, or as the driver was expanded to detect more or newer hardware devices, it is now mis-detecting my hardware and driving it incorrectly.
It's certainly possible I could have overlooked something stupid, but I've been running linux machines since the early 90's (and I realize that doesn't necessarily mean I can do anything useful with linux on any particular day) but I'm not just a fresh newbie who got ahold of his first linux dvd. I did put in several hours of effort before posting to try to eliminate the obvious stuff.
Is there a way to override the hardware auto-detection and force a particular mode for particular hardware? Is there a place that lists what the driver options are?
As I said before, audio was working perfecting in Fedora 14. All I did was run preupgrade, reboot, install the pacakges, reboot, and everything else came up and worked except for the audio which didn't. I didn't change any of the physical configuration.
Guess I'll keep at it here and if I come across a solution or get more information, I'll post it.
---------- Post added at 07:00 PM ---------- Previous post was at 06:11 PM ----------
I found a post in another forum that seems to match my issue more than any other description I've been able to find.
The common thread here might be the 2.6.38 kernel? This thread didn't have a solution yet though. The question is: can we find a work around to get sound working again? Or am I SOL. Of course I just gave away my two old sound blaster cards a couple weeks ago because I figured I'd never need them again.
---------- Post added at 07:30 PM ---------- Previous post was at 07:00 PM ----------
Ok, I have sound again. Here is the trick: I completely power cycled my machine. Something must have gotten wedged in the hardware. Googling around, I saw some references to these same symptoms with the same motherboard for someone on windows (no sound, just periodic pops and clicks.) A complete power cycle was one thing I hadn't tried yet. I did that and everything came back and is working now.
Sorry for the noise and thanks to oldcpu for giving me a few things to try.
I am now a 100% happy Fedora 15 upgraded user. :-)