linux-kernel - Re: intel-hda sound too quiet in linux-2.6.25-rc6

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Message-ID: <s5hiqzknw6d.wl%tiwai@suse.de>
Date:	Tue, 18 Mar 2008 11:50:02 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	"Adam J. Richter" <adam@...drasil.com>
Cc:	pshou@...ltek.com.tw, matt.jared@...el.com, andy.kopp@...el.com,
	dan.d.kogan@...el.com, linux-kernel@...r.kernel.org
Subject: Re: intel-hda sound too quiet in linux-2.6.25-rc6

At Tue, 18 Mar 2008 00:41:58 -0700,
Adam J. Richter wrote:
> 
> On Mon, Mar 17, 2008 at 11:23:59PM -0700, Adam J. Richter wrote:
> >         I have a motherboard that uses the AMD am690g chip set,
> > which has a sound hardware called "azalia", which apparently is
> > controlled by linux/sound/pci/hda/hda_intel.c.
> > 
> > 	The audio works fine under linux-2.6.24.2.  However, in
> > linux-2.6.25-rc3 (haven't tried earlier ones) through 2.6.25-rc6
> > (released a couple of hours ago), the audio is barely audible unless I
> > crank up my speakers to the maximum volume, at which point I can hear
> > the music playing relatively quietly.  In comparison, if I were to do
> > that with 2.6.24.2, it would wake the neighbors.  In both cases,
> > this is with the volume set in aumix to 100 in both left and right
> > (the maximum values).
> > 
> >         I haven't attempted to look through kernel changes from
> > 2.6.24.2 to 2.5.25-rc3 yet, although I expect to over the weekend if
> > nobody beats me to it.
> > 
> > Adam Richter
> 
> 	I want to add the results of a few simple tests:
> 
> 	1. Reverting only linux-2.6.25-rc6/sound/pci/hda/hda_intel.c to the
> 	   2.6.24.2 version had no effect (sound was still very quiet).
> 
> 	2. Reverting linux-2.6.25-rc6/sound/pci/hda/*.[ch] to their
> 	   2.6.24.2 versions worked (i.e., sound was lound again).
> 
> 	3. Other quick attempts at reverting various subsets of
>  	   linux/sound/pci/hda/*.[ch] have resulted only in compilation
> 	   errors.

That's vital to know which codec is used.  lspci shows only the
controller chip and it doesn't help debugging at all.

Please show the alsa-info.sh output.  At best, get the alsa-info.sh
outputs on both 2.6.24 and 2.6.25 kernels to compare.


thanks,

Takashi
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