Bug 29672 - [regression][ALSA][hda-conexant][2.6.38-rcX] external microphone sound too quiet
Summary: [regression][ALSA][hda-conexant][2.6.38-rcX] external microphone sound too quiet
Alias: None
Product: Drivers
Classification: Unclassified
Component: Sound(ALSA) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Jaroslav Kysela
Depends on:
Blocks: 27352
  Show dependency tree
Reported: 2011-02-22 20:23 UTC by Maciej Rutecki
Modified: 2012-06-14 17:45 UTC (History)
6 users (show)

See Also:
Kernel Version: 2.6.38-rc
Tree: Mainline
Regression: Yes

Alsa Soundcard information (21.66 KB, text/plain)
2011-05-12 03:07 UTC, Shawn Starr

Description Maciej Rutecki 2011-02-22 20:23:29 UTC
Subject    : [regression][ALSA][hda-conexant][2.6.38-rcX] external microphone sound too quiet
Submitter  : Shawn Starr <shawn.starr@rogers.com>
Date       : 2011-02-19 6:02
Message-ID : 474630.25335.qm@smtp105.rog.mail.re2.yahoo.com
References : http://marc.info/?l=linux-kernel&m=129809536502092&w=2

This entry is being used for tracking a regression from 2.6.37. Please don't
close it until the problem is fixed in the mainline.
Comment 1 Rafael J. Wysocki 2011-04-17 18:17:24 UTC
On Sunday, April 17, 2011, Shawn Starr wrote:
> On Sunday, April 17, 2011 03:52:09 PM Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.37 and 2.6.38.
> > 
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.37 and 2.6.38.  Please verify if it still should
> > be listed and let the tracking team know (either way).
> > 
> > 
> It is continuing, using the external microphone the audio is too quiet no 
> matter how loud I set it with PulseAudio.
> The audio onboard Lenovo W500 laptop is: Conexant CX20561 (Hermosa)  
> I have not had time to do any investigations to look at the git changes made.
Comment 2 Takashi Iwai 2011-04-18 14:41:29 UTC
I haven't got any reply to my follow up in the thread...
Comment 3 Florian Mickler 2011-05-10 18:48:14 UTC

On Sun, 20 Feb 2011 10:22:25 +0100
Takashi Iwai <tiwai@suse.de> wrote:

> Yes, alsa-info.sh output is always helpful.  Please attach.
> Do you mean a regression from which kernel version?
> If you have both a working and a non-working kernel, please give the
> alsa-info.sh outputs on both for comparison.
> thanks,
> Takashi
Comment 4 Shawn Starr 2011-05-12 02:45:16 UTC

I will try from what Takashi mentioned:

>Just try model=hp.  This corresponds to a model without the


Then confirm if this workaround is correct before I go further in providing alsa-info.sh. I'm now following 2.6.39-0.rc6.git0.0.fc16.x86_64 or 2.6.39-rc6.git0.
Comment 5 Shawn Starr 2011-05-12 02:45:51 UTC
I'll reply to the original thread shortly to confirm
Comment 6 Shawn Starr 2011-05-12 03:07:15 UTC
Created attachment 57472 [details]
Alsa Soundcard information

HDA Intel - Conexant CX20561 (Hermosa) info
Comment 7 Shawn Starr 2011-05-12 03:10:00 UTC
So I have tried it, same problem, no amount of volume lets me use the external microphone it is just too quiet even PulseAudio Volume Control shows it barely moving the volume meter.

[   24.235343] ALSA sound/pci/hda/hda_codec.c:3706: hda_codec: model 'hp' is selected

Plugging in a internal microphone/headset I can hear my voice fine (aside from machine noise interference/and noise).
Comment 8 Takashi Iwai 2011-05-13 11:05:51 UTC
Please give the alsa-info.sh output with model=hp and plugging a mic jack.
Also, please run the older working kernel and get alsa-info.sh output in the same situation.  In that way, we can track the regression.

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