Sound and USB ports stopped working

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http://forums.fedoraforum.org – I'm trying to solve a problem with sound and USB ports in Fedora 17. After many months of trouble free operation the sound and front panel USB ports have stopped working on my Fedora 17 desktop system. Sound does not work in any application (Mplayer, Kaffine, Firefox, etc). Simple sound configuration, analog audio out to two speakers. This is a desk top system, clean install of Fedora 17 from DVD May-2012. During Fedora 17 installation no additional configuration was required to get sound working. Worked fine 'out of the box'. System info: Linux Basalt 3.6.1-1.fc17.x86_ (HowTos)