[alsa-devel] ALSA - No sound on MBA2,1

[Bruno Prémont]

Hi Takashi,

On Wed, 04 Dec 2013 08:14:18 +0100 Takashi Iwai wrote:
> At Tue, 3 Dec 2013 22:54:13 +0100, Bruno Prémont wrote:
> > Hi Takashi,
> > 
> > Since I started using Linux on a MBA2,1 I never had sound working.
> > recently searching for some solution to get sound working I saw that
> > some users had sound with 3.2.x kernels and reported it stopped working
> > somewhere between 3.2 and 3.4.
> > 
> > Thus I tried bisecting this and found two steps of losing sound support,
> > a first one being losing sound output on built-in speaker, a second
> > point where sound through headphone jack stopped working.
> > 
> > Even with 3.2 non of the mute options is working (I did not try recording
> > via build-in microphone)
> > 
> > ...
> > 
> > Attached is the output of `alsa-info --with-devices` under current 3.12.2
> > kernel and under 3.2.53.
> > 
> > As this all seems related to quirks being replaced with auto-parsing.
> > Trying to revert the commits on top of 3.12.x looks unworkable.
> > 
> > Is there some extra data I should try to provide or a workaround/fix I
> > could try out? I'm booting in EFI mode using EFI stub (did backport it
> > from 3.3 to 3.2 for bisecting/testing 3.2).
> 
> You seem to be passing model=3stack, and this must break things.
> To be sure, try sound.git tree for-linus branch without any options.
>   git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git

I tried your branch (with merged rc2 from Linus) and there is still no
sound.
(took some time to test as kernel freezes during boot somewhere in
nouveau, thus me merging in rc2 in the hope of a fix for that)

> If it still doesn't work, please give alsa-info.sh output with that
> kernel.

`alsa-info --with-devices` is attached.

Bruno


> Takashi
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