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SubjectRe: 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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