it seem that the driver does not follow the usage of dac_0 and dad_1 in ad1984a
datasheet ,
dac_0 is used by headphone and dac_1 is used by portD
analog mixer select signal from dac_0 node 0x03
this mean pulseaudio can only mute speaker playback switch but cannot
turn off speaker playback volume
Node 0x20 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Control: name="Internal Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Control: name="Internal Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Control: name="Front Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=0, ofs=0
Control: name="Front Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=0, ofs=0
Control: name="Line Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=4, ofs=0
Control: name="Line Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=4, ofs=0
Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
Amp-In vals: [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
[0x17 0x17] [0x80 0x80]
Connection: 7
0x14 0x15 0x16 0x1a 0x25 0x03 0x04
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https://bugs.launchpad.net/bugs/1335334
Title:
[HP EliteBook 8730w, Analog Devices AD1984A, Grey Headphone Out,
Front] fails after a while
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