Audio fails on centos 5.5 sony laptop - snd-hda-intel

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Hi List, been chasing my tail for the last two hours and getting nowhere on my wifes laptop. I only do updates monthly on her machine, as it is safely behind firewalls and only does email and browser stuff. I have never had audio problems on this laptop, Centos just worked from day one - even the wireless.

It appears that the 5.5 kernels and related audio driver snd-hda-intel do not function.
If I reboot into 2.6.18-164.15.1.el5.centos.plus all is well.
$ cat /proc/asound/cards
0 [Intel          ]: HDA-Intel - HDA Intel
                     HDA Intel at 0x80000000 irq 169
1 [U0x46d0x804    ]: USB-Audio - USB Device 0x46d:0x804
USB Device 0x46d:0x804 at usb-0000:00:1d.7-3, high speed

Neither 2.6.18-194.3.1.el5.centos.plus or 2.6.18-194.8.1.el5.centos.plus have functioning sound.
on these kernels I get
$ cat /proc/asound/cards
0 [U0x46d0x804    ]: USB-Audio - USB Device 0x46d:0x804
USB Device 0x46d:0x804 at usb-0000:00:1d.7-3, high speed

yet lsmod shows
<snip>
snd_hda_intel         472337  0
snd_seq_dummy           7877  0
snd_seq_oss            32577  0
snd_seq_midi_event     11073  1 snd_seq_oss
snd_seq                49585  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss            42817  0
snd_usb_audio          77761  2
snd_mixer_oss          19009  1 snd_pcm_oss
snd_pcm                72133  3 snd_hda_intel,snd_pcm_oss,snd_usb_audio
snd_usb_lib            19137  1 snd_usb_audio
snd_rawmidi            26561  1 snd_usb_lib
snd_timer              24517  2 snd_seq,snd_pcm
snd_page_alloc         14281  2 snd_hda_intel,snd_pcm
snd_seq_device 11725 4 snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd_hwdep              12869  2 snd_hda_intel,snd_usb_audio
snd 55749 15 snd_hda_intel,snd_seq_oss,snd_seq,snd_pcm_oss,snd_usb_audio,snd_mixer_oss,snd_pcm,snd_rawmidi,snd_timer,snd_seq_device,snd_hwdep
soundcore              11553  1 snd

So I remembered the bug rh introduced with the 194 kernels and nvidia chipsets (not my case but I'm desperate) and added the enable_msi=0 so that my modprobe.conf is now
<snip>
options snd cards_limit=8
alias snd-card-0 snd-hda-intel
options snd-hda-intel index=0 enable_msi=0

but it still will not work.
<rant>
I am getting frustrated at the retrograde steps that seem to be hitting kernel and 5.x upgrades lately. yum update used to just work, get me the latest patches and all was well - after all that is why I use Centos.
</rant>
I have tried modprobe -r to remove and reload module but to no avail.
Anyone have any ideas as to what I try next?
Google has not given me any ideas yet.
TIA

begin:vcard
fn:Rob Kampen
n:Kampen;Rob
email;internet:rkampen@xxxxxxxxxxxxxxxxx
x-mozilla-html:TRUE
version:2.1
end:vcard

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