try latest alsa-driver
https://wiki.ubuntu.com/Audio/UpgradingAlsa/DKMS
PCM playback volume control has been deleted from node 0x16 and the amp
-in values set to 0dB [0x17 0x17]
Node 0x16 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
Control: name="Rear Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=2, ofs=0
Control: name="Rear Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=2, ofs=0
Control: name="Front Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=4, ofs=0
Control: name="Front Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=4, ofs=0
Control: name="Line Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=3, ofs=0
Control: name="Line Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=3, ofs=0
Control: name="CD Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Control: name="CD Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x06, mute=1
Amp-In vals: [0x17 0x17] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
[0x80 0x80]
Power states: D0 D1 D2 D3
Power: setting=D0, actual=D0
Connection: 6
0x10 0x1f 0x1a 0x1b 0x1e 0x25
** Also affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1210129
Title:
Pulseaudio does not recognize sound levels correctly.
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