Hi.

Forgive me for posting here on a centos issue... but, maybe it'll help someone if they run into the same issue on centos/fed...

Did a yum update.... yum went through the process, did the update as expected.

However, after the update.. sound was gone!

Checked for the cards:
  cat /proc/asound/cards

only one card '0'

Did a
  alsactl restore 0  (as root)

Followed this up with a
  pulseaudio -k
  pulseaudio -D  --system  (as root) in a sep window..

Sound appears to be running..

If you have additional info, feel free to add it, might help someone in the future!

Thanks