1. Patch your system up to current levels. 2. Edit the /etc/hotplug/blacklist and add this to end of file: snd-intel8x0m 3. Reboot your system. run alsamixer to check the sound levels. 4. This should solve the missing sound.
I have tested these steps on two different types of machines. It's worked each time. Make sure you patch your system, I tried this one time without patching and I still did not have sound. Once the system was patched and the blacklist was updated sound worked without issue.
-- Wayne Leutwyler - RHCT, CNA Linux Admin / DBA Columbus OH. USA http://linux.is-a-geek.net