[alsa-devel] No speaker output with kernel 3.15 and later

[Steven Newbury]

On Mon, 2014-06-30 at 11:24 +0200, Takashi Iwai wrote:
> At Sun, 29 Jun 2014 15:09:56 +0100,
> Steven Newbury wrote:
> >  I sent 
> > Takashi an email mentioning this regression a month ago, and
> >  it's 
> > taken me this long to send this email... :-$
> >  Since updating to 
> > kernel versions >=3.15 I've had no audio from my
> >  laptop speakers.  
> > Earlier versions worked fine.
> >  It's a CLEVO W270EUQ laptop.  The 
> > output mixer device is showing up,
> >  but no sound comes out at any 
> > volume level.
> >  As requested I've attached compressed alsa-info.sh 
> > output for both the
> >  working and non-working cases.
> >  I'm perfectly 
> > willing to test patches etc.
>  
> Hm, I see no significant difference between 3.14 and 3.15 alsa-info.sh
> outputs, and there's been very little change for VIA codecs between
> these versions.  So, in short, I have no idea what went wrong.
>  
> Could you double-check whether it's really a kernel issue?
> That is, switch between 3.14 and 3.15 and confirm the problem happens
> only with 3.15.  Also, for testing the sound, try like
>  
>         % aplay -Dplughw -vv foo.wav
> 
Checked again.

3.16-rc2: silence
3.14.3: works fine

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