Re: audio problems with custom kernel (Intel 810 + AC97 Audio)
On Wed, Nov 10, 2004 at 03:26:28AM +0200, Count L?szl? de Alm?sy wrote:
> I'm having some problems with audio now that I've started using the
> 2.6.9 kernel that I built. Audio did work with the
> 2.6.8-3-amd64-k8-smp kernel that came with the install image.
>
> lspci shows the audio controller:
>
> rosebud:~# lspci | grep -i audio
> 0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801EB/ER
> (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
>
> The right drivers seem to be loaded:
>
> rosebud:~# lsmod | grep -i audio
> i810_audio 40344 0
> ac97_codec 21016 1 i810_audio
> soundcore 12256 2 i810_audio,snd
>
> However no sound comes out when I play an audio file.
>
> Looking at dmesg output, it seems the controller shows up, but only
> on one line:
>
> rosebud:~# dmesg | grep -i audio
> Intel 810 + AC97 Audio, version 1.01, 18:06:18 Nov 5 2004
>
> As opposed to several lines when looking at the dmesg output for the
> previous kernel:
>
> rosebud:/var/tmp# grep -i audio dmesg.2.6.8-3-amd64-k8-smp
> Intel 810 + AC97 Audio, version 1.01, 00:32:26 Aug 30 2004
> i810_audio: Primary codec has ID 0
> i810_audio: Audio Controller supports 6 channels.
> i810_audio: Defaulting to base 2 channel mode.
> i810_audio: Resetting connection 0
> i810_audio: Connection 0 with codec id 0
> ac97_codec: AC97 Audio codec, id: ADS116 (Unknown)
> i810_audio: AC'97 codec 0 supports AMAP, total channels = 2
> i810_audio: setting clocking to 48607
>
> Any ideas what the problem might be or how I can debug this?
Well some ac97 implementations are "backwards" due to intel changing the
spec at some point, and your chip may have its inputs and outputs
swapped around. On some newer boards you end up with lineout actually
being swapped with linein or mic or something like that. The alsa
driver has a 'quirk' option you can set to swap it back on those chips,
while with the OSSlite driver you are stuck with it being wrong I
believe.
So check mixer settings and try plugging the speakers into other jacks.
Len Sorensen
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