[SOLVED]No sound on Macbook Aluminum (following wiki)

Question

Hello, I'm hoping for some advice on how to get sound out of the speakers on my aluminum macbook pro.
I have been following the ALSA page in the wiki, and my setup appears to check out against the instructions, but when I test with aplay Front_Center.wav, I just don't hear anything.
I will include some output showing the loaded set of device modules at the bottom of this post.  I can also provide the output of amixer, but it is pretty long, so I'll leave it out until it is requested.
If I continue following the wiki, then one last thing that I should try is running alsaconf.  However, when I do this, I am presented with a prompt to the effect that it might make my system unstable, so I thought it best to check here first.
I expect that, if going all the way through the last-ditch alsaconf step were necessary, then something would have been mentioned about it on the macbook wiki page, so I'm inclined to think I've done something wrong in a preceding step, though I don't know what that might be.
Thanks for your time, everyone. 
Output is here:
[mac01021@entrope ~]$ lsmod | grep '^snd' | column -t
snd_hda_codec_cirrus 10403 1
snd_seq_dummy 1447 0
snd_seq_oss 28928 0
snd_seq_midi_event 5420 1 snd_seq_oss
snd_seq 50530 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device 5241 3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss 39096 0
snd_mixer_oss 16932 1 snd_pcm_oss
snd_hda_intel 21906 0
snd_hda_codec 76595 2 snd_hda_codec_cirrus,snd_hda_intel
snd_hwdep 6126 1 snd_hda_codec
snd_pcm 71653 3 snd_pcm_oss,snd_hda_intel,snd_hda_codec
snd_timer 19660 2 snd_seq,snd_pcm
snd 57225 11 snd_hda_codec_cirrus,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
snd_page_alloc 7201 2 snd_hda_intel,snd_pcm
[mac01021@entrope ~]$ ls -l /dev/snd/
total 0
drwxr-xr-x 2 root root 60 Aug 15 09:19 by-path
crw-rw---- 1 root audio 116, 8 Aug 15 09:19 controlC0
crw-rw---- 1 root audio 116, 7 Aug 15 09:19 hwC0D0
crw-rw---- 1 root audio 116, 6 Aug 15 09:19 pcmC0D0c
crw-rw---- 1 root audio 116, 5 Aug 15 09:19 pcmC0D0p
crw-rw---- 1 root audio 116, 4 Aug 15 09:19 pcmC0D1p
crw-rw---- 1 root audio 116, 3 Aug 15 09:19 seq
crw-rw---- 1 root audio 116, 2 Aug 15 09:19 timer
Last edited by mac01021 (2010-08-15 16:07:50)

Answer 1

I have read the macbook wiki page. As well as that for specifically the aluminum macbook pro. 
Except for adding an option in modprobe.conf, they just direct to the standard ALSA page.  In the wiki, there are several recommendations for the option line in the modprobe.conf file including
options snd_hda_intel model=intel-mac-auto
options snd_hda_intel model=mbp3
options snd_hda_intel model=mb5
I have tried all of these with the same result.