RHEL 3 update 4 - no sound?

From: Cliff McCollum (cliff_at_example.com)
Date: 12/23/04 

Date: Wed, 22 Dec 2004 23:25:32 GMT

I have upgraded a Dell Precision 370 workstation from RHEL 3 update 3,
to update 4. I have now lost all sound.

/var/log/messages contains:

Dec 22 15:16:55 kayak kernel: Intel 810 + AC97 Audio, version 0.24,
10:27:57 Dec 21 2004
Dec 22 15:16:55 kayak insmod:
/lib/modules/2.4.21-27.ELsmp/kernel/drivers/sound/i810_audio.o:
init_module: No such device
Dec 22 15:16:55 kayak insmod: Hint: insmod errors can be caused by
incorrect module parameters, including invalid IO or IRQ parameters.
    You may find more information in syslog or the output from dmesg
Dec 22 15:16:55 kayak insmod:
/lib/modules/2.4.21-27.ELsmp/kernel/drivers/sound/i810_audio.o: insmod
sound-slot-0 failed
Dec 22 15:16:55 kayak modprobe: modprobe: Can't locate module
sound-service-0-3

And dmesg shows 265 lines of (and nothing else):

Intel 810 + AC97 Audio, version 0.24, 10:27:57 Dec 21 2004

If I boot back to the 2.4.21-20.ELsmp kernel, everything is fine. I know
  the new kernel changed things around the Open Sound System - which I'm
sure are to blame.

Any suggestions on where to look, or what to fix?

Please reply to cliffmcc <at> shaw (dot) ca

Cliff