snd_atiixp on MSI S270, speakers disabled

Ariff Abdullah ariff at
Wed Apr 18 20:38:10 UTC 2007

On Wed, 18 Apr 2007 22:00:37 +0200
Christian Mueller <raptor-freebsd-multimedia at> wrote:
> Hi,
> running FreeBSD 6.2-p3 with a generic kernel and snd_atiixp gives me
> no sound  on the notebook speakers. With headphones it is barely
> noticeable. I've tried  setting all mixer variable to 100 with no
> avail.
> raptor at hexe:~> pciconf -l | grep pcm
> pcm0 at pci0:20:5: class=0x040100 card=0x01311462 chip=0x43701002
> rev=0x01  hdr=0x00
> raptor at hexe:~> dmesg | grep pcm
> pcm0: <ATI IXP 400> mem 0xfbdfc800-0xfbdfc8ff irq 17 at device 20.5
> on pci0 pcm0: <Avance Logic ALC655 AC97 Codec>
> There is an ALSA patch which fixes some EAPD for the S270 by
> flipping bit 0  (?) in register 0x7a of the AC97 codec... whatever
> that means. 
> I've tried fiddling around in ac97.c and snd_atiixp.c, but since I
> don't know  what I'm exactly doing, I wasn't successful so far :)
> Would anyone be so kind in helping me with this?

Don't fiddle with ac97.c . Instead, go to Line 800 in atiixp.c and try
adding your card id (0x01311462) there.

Ariff Abdullah

... Recording in stereo is obviously too advanced
    and confusing for us idiot ***** users :P ........
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