[alsa-devel] EeePC 1005PE microphone is "stereo only", silent in mono
proski at gnu.org
Tue Aug 2 22:15:14 CEST 2011
On 08/02/2011 03:23 PM, Takashi Iwai wrote:
>> board_config is 4 (ALC269_DMIC). So the condition needs to be removed
>> for the fixup to be applied. I guess the fixup for EeePC 1005HA should
>> be called elsewhere. I'm not using any module parameters.
> OK, then just pass model=auto. It may result in different mixer
> elements, but mostly it should work. (Actually it's helpful if you
> can test the auto-parser.)
That was it! sound-2.6/master is working now. No more noise. Stereo
and mono are fine. No need to bisect anything.
So I just added "options snd_hda_intel model=auto" to /etc/modprobe.d
Obviously, it would be nice not to pass any parameters. Things should
>> I get nothing but noise on the sound-2.6/master branch. It happens
>> regardless of whether I'm using one or two channels with arecord.
> Does it happen no matter whether patched and/or model option value?
The patch has no effect on the noise. But model=auto makes all the
difference. And I wrongly assumed it was a default.
>> I remember a few cases when I was able to record proper sound with 2
>> channels on the sound-2.6/master kernel. But most of the time, I would
>> get that noise. It looks like a separate regression.
>> I could try to bisect it. It's a big investment of time, considering
>> that the system has an Atom CPU, so I'd like to know if there is any
>> interest in that, or there is some patch lying around that would address
>> the noise problem.
> Before starting bisecting, please give alsa-info.sh outputs on both
> working and non-working kernels. Then we can compare the visible
> difference of register values (although coef stuff isn't exposed
I guess it's not needed anymore. What's needed it to make "auto" the
default (or some variation of that).
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