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Subject: Re: i810 audio
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Brian C. Huffman" <sheep@graze.net>
Cc: Marcelo Tosatti <marcelo@conectiva.com.br>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: 12 Nov 2002 23:38:04 +0000
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On Tue, 2002-11-12 at 23:06, Brian C. Huffman wrote:
> Alan / All,
> 
> 	I assume this is the patch that's been in your -ac kernels for a 
> while?  I have an Intel 845GBV board which uses the ICH4 architecture.  
> I'm happy to report that this patch does allow me to use the integrated 
> sound on this motherboard, but one thing that I've noticed is that it 
> seems as though to adjust volume you need to adjust the actual channel 
> (PCM, CD, etc), rather than main volume.  Any ideas why this might be so?

It could be the mixer on your board doesnt support main volume control.
The i8xx audio is half of a whole, it deals with transferring streams of
audio data and mixer requests down an AC'97 audio bus to a codec which
does the D/A parts. That codec varies by board.

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