ac97 sound device not detected (alc655 codec)

[Vincent Stemen <vs1@xxxxxxx>]

Hi.  Are there any known bugs in detecting ac97 sound devices?  It does
not detect ours at all.  We tried on the 1.6.0 kernel and on the
1.7.0-preview from CVS yesterday.   We loaded snd.ko module manually and
also tried loading snd_pcm with loader at boot time.  If I understand
correctly, snd_pcm is the one that handles the ac97 devices.   

Every time we load the snd module, we also get this error
    fdc0: cannot reserve interrupt line
printed about 6 or 7 times to the system log

When I cat /dev/sndstat, this is all I get:
    FreeBSD Audio Driver (newpcm)
    Installed devices:

The sound works fine on NetBSD.  NetBSD reports that it is an ALC655
codec using IRQ 10.

We looked in the sys/dev/sound/pcm/ac97.c file and that codec is listed
in the ac97_codecid structure.

Any suggestions?