[alsa-devel] Regression in Traktor Audio10 driver (snd-usb-audio) mixer flags

[Takashi Iwai]

On Wed, 13 Jan 2016 05:23:53 +0100,
Owen Williams wrote:
> 
> Yes, that does allow me to use the mixer flags again.  However I notice
> when I connect the device it no longer starts up with the flags in the
> default state I can specify when I connect the card to my mac -- is
> that the resume functionality that's supposed to work?

This is likely by the restore via alsactl from the last saved state.
It's nothing new, this should have been present before, too.  But the
regression also prevented this happening, so you might notice it now.

In anyway, I'm going to queue the fix to upstream tree.


thanks,

Takashi

> 
> 
> On Tue, 2016-01-12 at 23:17 +0100, Takashi Iwai wrote:
> > On Tue, 12 Jan 2016 22:24:41 +0100,
> > Owen Williams wrote:
> > > 
> > > Finally found the bad commit:
> > > SHA da6d276957ea56b9514aa5c8d885edf22f0b3e65
> > > ALSA: usb-audio: Add resume support for Native Instruments controls
> > 
> > Great, thanks for spotting out!
> > 
> > > I did upgrade my firmware at some point, perhaps the newer firmware
> > > changed how this works.  Happy to test whatever patches against a
> > > newer
> > > kernel (I'm on Wily, so 4.2.0-23).
> > 
> > Could you try the patch below?
> > 
> > 
> > Takashi
> > 
> > ---
> > diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
> > index 0ce888dceed0..279025650568 100644
> > --- a/sound/usb/mixer_quirks.c
> > +++ b/sound/usb/mixer_quirks.c
> > @@ -793,7 +793,7 @@ static int
> > snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
> >  		return 0;
> >  
> >  	kcontrol->private_value &= ~(0xff << 24);
> > -	kcontrol->private_value |= newval;
> > +	kcontrol->private_value |= (unsigned int)newval << 24;
> >  	err = snd_ni_update_cur_val(list);
> >  	return err < 0 ? err : 1;
> >  }
> > 
> > 
>