[pulseaudio-tickets] [Bug 90972] No sound when plugging in headphones, must unmute and raise Speker+LO to get sound

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90972

--- Comment #16 from Raymond <superquad.vortex2 at gmail.com> ---
(In reply to Martin Erik Werner from comment #14)
> (In reply to Raymond from comment #13)
> > you have to disable loopback mixing since driver assign the first dac node
> > 0x13 to aamix_path
> 
> How would do I do that? (and should I?)

you can use 

amixer -c 0 set 'Loopback Mixing' Disabled


Simple mixer control 'Loopback Mixing',0
  Capabilities: enum
  Items: 'Disabled' 'Enabled'
  Item0: 'Enabled'


you have to open bug report at kernel bigzilla about the aamix path always use
first DAC when aamix mixer can connect to more than one DAC 



Node 0x1b [Audio Mixer] wcaps 0x20050b: Stereo Amp-In

  Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x17 0x17] [0x80 0x80]
[0x80 0x80]
  Power states: 
  Power: setting=D0, actual=D0
  Connection: 6
     0x0c 0x0e 0x0f 0x13 0x14 0x0a

the driver need to change amp in vals when headphone is plugged when loopback
mixing is enabled

Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x17 0x17] [0x80
0x80]

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