[alsa-devel] [PATCH] ALSA: HDA: Fix front mic on Dell Precision M6500

David Henningsson david.henningsson at canonical.com
Tue Aug 31 11:01:40 CEST 2010

2010-08-30 18:58, Takashi Iwai skrev:
> At Thu, 26 Aug 2010 12:22:42 +0200,
> I wrote:
>> At Mon, 23 Aug 2010 21:25:55 +0200,
>> David Henningsson wrote:
>>> I admit that the best thing would be to make the driver support all
>>> three mics, but at this point, the alsa driver can only support two, one
>>> called "mic" and one called "front mic". I believe the best choice is to
>>> select the internal mic as "front mic" and the mic jack on the laptop as
>>> "mic", thus leaving the docking station mic jack non-functional.
>>> The behavior without this patch is to select the mic jack on the laptop
>>> as "mic" and the mic on the docking station as "front mic", thus leaving
>>> the internal mic non-functional in all cases, and that regardless of you
>>> have a docking station or not.
>> OK, here is a test patch for fixing more intensively.  (I just did
>> build-test, totally untested with real machines :)
>> It basically extends the config parser to allow multiple input pins
>> assigned for a single type.  The old input_pins field is kept for
>> other drivers, so that it won't give regressions.  It'll be removed
>> in future.
> As my tests with hda-emu through all codec data passed well, I
> committed the fixes to sound git tree now.
> Give the latest alsa-driver snapshot try.

Thanks, I'll try to get someone to test it :-)

Ubuntu has automated builds of your daily snapshot tarball which we make
available to our users. What time of day to you recommend that we pick
it to get the lowest latency?

Btw, do you have an automated test suite to try all codeces with hda-emu
or do you just run a few manually and see if they work?

David Henningsson, Canonical Ltd.

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