It's my first email, so hi everyone.

I'm experiencing sound completely muting on 
kernel-3.10.0-327.3.1.el7.x86_64. On kernel-3.10.0-229.el7.x86_64 
everything is OK.

I don't see any particular pattern. After playing something in 
Audaciuos, or Chrome/Firefox (both flash and html5) for about 15 
seconds, sound is just gone. It isn't muted in mixer, but changing 
volume level a little up/down usually does help. Sometimes doesn't. If I 
restart the application, sound comes back again for ~15 seconds. 
Refreshing page, or clicking stop,play does not work.

-- 
Łukasz Posadowski