After attempting an "oss4" audio install, I lost audio, and reverting my mistake, did not recover the audio.
Needed to "manually": modprobe snd-hda-intel
every boot....
Until I found that the driver had been put in a blacklist.... on the oss4 attempt.
grep snd-hda-intel /etc/modprobe.d/*
/etc/modprobe.d/oss4-base_noALSA.conf:blacklist snd-hda-intel
moved the "oss4-base_noALSA.conf" away from the "/etc/modprobe.d"
sudo mv /etc/modprobe.d/oss4-base_noALSA.conf /root
and now, do not need to manually "modprobe snd-hda-intel" to get audio after every boot....
Hope it helps...