No sound after upgrading to RHEL4.4

[Robert Berlinger]

I've got no sound after upgrading to RHEL4.4.  This is with a Precision
380.  I had a long thread about a year ago with John Hull on sound
problems from the beginning with this system.  I finally got it working
but the gremlins are back.  Any suggestions as to where to start looking?

$ lsmod | grep snd

snd_azx                20569  2 
snd_hda_codec         157761  1 snd_azx
snd_pcm_oss            59385  0 
snd_mixer_oss          21313  2 snd_pcm_oss
snd_pcm               109769  3 snd_azx,snd_hda_codec,snd_pcm_oss
snd_timer              28617  1 snd_pcm
snd                    62857  8 snd_azx,snd_hda_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore              12257  2 snd
snd_page_alloc         12881  2 snd_azx,snd_pcm

I previously had the following in /etc/modprobe.conf:

alias snd-card-0 snd-hda-intel
install snd-hda-intel /sbin/modprobe --ignore-install snd-hda-intel && /usr/sbin/alsactl restore >/dev/null 2>&1 || :
remove snd-hda-intel { /usr/sbin/alsactl store >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-hda-intel

but then noticed that the snd-hda-intel module is no longer there, so I tried commenting all that and rebooting, but it didn't help.  Soundcard detection finds the snd_azx card but no sound from the test.

Any pointers would be much appreciated.