[alsa-devel] Fwd: Re: Realtek ALC889: HDA Intel and kernel 3.1 gives choppy sound (again)

[Colomban Wendling]

Here's my initial mail, but with gzipped outputs.

Regards,
Colomban

-------- Message original --------
Sujet: Re: [alsa-devel] Realtek ALC889: HDA Intel and kernel 3.1 gives
choppy sound (again)
Date : Thu, 10 Nov 2011 02:11:17 +0100
De : Colomban Wendling <lists.ban at herbesfolles.org>
Pour : Takashi Iwai <tiwai at suse.de>
Copie à : alsa-devel at alsa-project.org

Hi again, and sorry for the delay.

Le 08/11/2011 07:32, Takashi Iwai a écrit :
> At Mon, 07 Nov 2011 23:45:40 +0100,
> Colomban Wendling wrote:
>>
>> Hi,
>>
>> Back to 3.0, the sound on my soundcard [1] started to be choppy, I
>> reported it [2] and it got fixed (thanks to Takashi Iwai!).
>>
>> However, the story repeated with 3.1 (and probably 3.0.8 or before [3]):
>> I've got similar choppy sound again.
>>
>> I bisected the few commits that happened on
>> sound/pci/hda/patch_realtek.c, and finally found the villain:
>>
>> "8974bd51 ALSA: hda/realtek - Fix auto-mute with HP+LO configuration"
>>
>> Reverting it from v3.1 fixes the problem.
> 
> Does it?  Very weird.  This patch has nothing to do with the HD-audio
> controller side but purely a codec change.

Yep, I just check once again and it really fixes the problem here.

>> master (94956ee) also suffers of the problem, but I couldn't test
>> without that commit because reverting it fails, too much changes happened.
> 
> Did you try to pass position_fix=1 (or 2) option?
> Also, passing enable_msi=0 (or 1) may change anything?

I just tried with the 3 kernels:

* vanilla v3.1
* vanilla 3.2-rc1 (master at 1ea6b8f)
* v3.1 with 8974bd51 reverted

and none of the option changed anything: both vanilla always failed, the
third always succeeded.  Though, I haven't combined the options, just
tried each at once.

> In anyway, please give alsa-info.sh output again with the fresh
> kernel.  Run it with --no-upload option and attach the output.

Here it is, for the 3 kernels cited above.


Regards,
Colomban



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