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Re: [Linphone-users] One-Way Audio Issues

From: Dragos D
Subject: Re: [Linphone-users] One-Way Audio Issues
Date: Tue, 5 Apr 2011 15:43:55 -0400

Did anyone try linux-backports-modules-alsa...?
This is how I made my internal mic work without tweaking module options.

On Tue, Apr 5, 2011 at 11:04 AM, Jim Diamond <address@hidden> wrote:
> On Tue, Apr  5, 2011 at 16:50 (+0400), Andrew Savchenko wrote:
>> Hi,
>> On Mon, 4 Apr 2011 20:34:09 -0300 Jim Diamond wrote:
>>> If it were only that easy...
>>> modinfo does not tell me that there is a 'fujitsu' option for my card.
>>> Poking around in
>>>      /usr/src/linux-
>>> I see there are only seven options for my card (ALC269) listed, so I guess
>>> with some patience and testing I could find out whether one of the
>>> other options works even better.  Mind you, in
>>>      /usr/src/linux-
>>> there are 10 models listed, but I guess if I can't specify each one
>>> individually it doesn't really matter how many models there are.
>> It looks like you misunderstood me.
> Not unless I continue to misunderstand you, which, I suppose, is
> possible.
>> You can build a kernel in a way, that you will have different
>> modules for different hda-intel models, not a single one driver.
> Yes, but (for example) the snd_hda_codec_realtek module covers many,
> many models of sound cards.  So even once someone has decided that the
> realtek module is the correct one to compile, they still (might) need
> to explicitly tell the kernel which model they are using.
> For example, there are (in 53 models of the ALC882 card.
> And someone hunting for the correct model for their computer could
> quickly eliminate some of them based on brand name (I'd guess), but
> there are still a lot of things to try out.
> And not all of the names are helpful.  My laptop is a Fujitsu
> Lifebook.  So should I use model=lifebook, which would seem like the
> obvious choice?  No, I need model=fujitsu.  Duh.  (It seems that
> model=laptop-dmic also works, but how many people know what "dmic"
> means?)
>> This will simplify things a lot since most of this modules will not
>> work on the very same hardware.
> That's true.  Mind you, discovering that could be very labour intensive.
> If a given module loads but doesn't work, you may just need to try
> loading it with different options, of which there might be many.
>>> However, you are right that if someone wants to dig far enough, they
>>> can discover what the options are for their card and try it out.  But
>>> I think it is a shortcoming that a user (who might not be as
>>> kernel-savvy as you, or at all kernel-savvy) needs to do something
>>> like this to figure out how to make his or her sound card work
>>> correctly.
>> I understand, this may be a tricky way for a common user, but at this
>> moment I can't offer another solution.
> Nor would I expect you to.  Maybe it is just an issue of the kernel
> developers keeping up with all of the different card models so that
> (when possible) the module, when initially loading, can do a better
> job of picking the correct sub-sub model.  Easy for me to say, since
> I'm not writing those drivers.
> Or maybe some benevolent person needs to start a wiki which can have
> all of this information in one easy-to-find place.  I see the ALSA
> project web site has a vendor list, the page for Intel says
>        This page was last modified 05:10, 23 December 2007.
> Ho hum.
> Cheers.
>                                Jim
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