Node 0x15 [Audio Output] wcaps 0xd0c05: Stereo Amp-Out R/L

bit 3 and bit 4 of wcaps

7.3.4.6 Audio Widget Capabilities The Audio Capabilities control returns
a set of bit fields describing the audio capabilities of the widget.
Parameter ID:  09h

If Amp Param Override is a 1, the widget contains its own amplifier
parameters.  If this bit is a 0, then the Audio Function node must
contain default amplifier parameters, and they should be used to define
all amplifier parameters (both input and output) in this widget.

If (In|Out) AmpPresent is a 1, the widget contains an input or output
amplifier, as indicated.  The Amp Param Override bit should be examined
to determine whether the widget contains default amplifier parameters or
has amplifier parameters that need to be explicitly queried.  The “In
Amp Present” bit is only relevant for Sum Widgets, Input Converters, and
Pin Complexes.  The “Out Amp Present” bit is only relevant for Selector
Widgets, Sum Widgets, Output Converter Widgets, and Pin Complex Widgets.

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https://bugs.launchpad.net/bugs/1357928

Title:
  [HDA-Intel - HDA Intel MID, playback] volume slider problem - Slide to
  bottom and sound stays off even when slider moved up again

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