ac97 sound device not detected (alc655 codec)

[Vincent Stemen]

On 2007-01-04, Gergo Szakal <bastyaelvtars at gmail.com> wrote:
> On 04 Jan 2007 15:58:05 GMT
> Vincent <vs1 at crel.us> wrote:
>
>> 
>> Thanks for the reply.  As I mentioned, we loaded snd.ko, which loads all
>> the sound drivers, and it was not detected.  Here is the output of
>> pciconf -lv.
>> 
>> none2 at pci0:17:5:        class=0x040100 card=0xa0021458 chip=0x30591106
>> rev=0x50 hdr=0x00
>>     vendor   = 'VIA Technologies Inc'
>>     device   = 'VT8233/33A/8235/8237 AC97 Enhanced Audio Controller'
>>     class    = multimedia
>>     subclass = audio
>> 
>> 
>
> No, you must load the module for your sound driver AND snd (according to corecode). There was such a thread in users@:
>
> http://leaf.dragonflybsd.org/mailarchive/users/2007-01/msg00034.html
>
> with the very same chip.
>

Thank you!  That got it working.  Now we can watch our movies on
Dragonfly!  We have been evaluating Dragonfly and, so far, it is very
impressive.  mplayer seems to play videos a lot smoother on a 1.3Gig
machine (even with KDE running) than NetBSD does on our 2.6Gig box.
I wonder if it is because of Matt's new LWKT code.

I had to directly load the snd_via8233.ko module.  It turns out that
snd.ko was apparently loading all the sound modules except for two.
snd_via8233.ko and snd_uaudio.ko.  I thought it was loading all of them.
Here is output of kldstat after loading snd.ko.

Id Refs Address    Size     Name
 1   28 0xc0100000 60cf58   kernel
 2    1 0xc070d000 37c4     md.ko
 3    1 0xc0711000 590f0    acpi.ko
31    1 0xd7181000 2000     snd.ko
32   23 0xd8a80000 18000    snd_pcm.ko
33    1 0xd79ea000 4000     snd_ad1816.ko
34    1 0xd8760000 4000     snd_als4000.ko
35    1 0xd89f7000 5000     snd_cmi.ko
36    1 0xd8ab8000 5000     snd_cs4281.ko
37    1 0xd8abd000 7000     snd_csa.ko
38    1 0xd8ad9000 b000     snd_ds1.ko
39    1 0xd8ac4000 7000     snd_emu10k1.ko
40    1 0xd8ace000 6000     snd_es137x.ko
41    1 0xd8a0c000 4000     snd_fm801.ko
42    1 0xd8ae4000 5000     snd_ich.ko
43    1 0xd8ae9000 7000     snd_maestro.ko
44    1 0xd8afc000 8000     snd_maestro3.ko
45    1 0xd8b35000 a000     snd_mss.ko
46    1 0xd8b3f000 10000    snd_neomagic.ko
47    1 0xd8b4f000 5000     snd_solo.ko
48    1 0xd8b54000 5000     snd_t4dwave.ko
49    1 0xd8a1c000 4000     snd_via82c686.ko
50    1 0xd8b59000 5000     snd_vibes.ko
51    4 0xd8b09000 4000     snd_sbc.ko
52    1 0xd8b5e000 4000     snd_sb16.ko
53    1 0xd8b62000 4000     snd_sb8.ko
54    1 0xd8b66000 5000     snd_ess.ko

So the question is, why did snd.ko not load two of the modules?  It is
just my luck that it happens to be the one for our sound device.  Is
that a bug or a feature?

Also, we have not found any documentation that lists what devices are
supported for each module?  Does it exist?  The snd/pcm man page lists
AC97 mixer and a variety of cards it supports, which led us to think
that that might me the only module needed for this device.  It does not
seem to mention anything about the other snd modules.