try live CD first to find out you still get sound instead of upgrade
one of the problem is there are pulseaudio dock Mic.conf but no dock
line out .conf in pulseaudio paths
do your notebook have line out at extra rear or it is dock station line
out
Node 0x12 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Control: name="Dock Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=Out, idx=0, ofs=0
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-Out vals: [0x80 0x80]
Pincap 0x0001001f: OUT HP EAPD Detect Trigger ImpSense
EAPD 0x0:
Pin Default 0x01014010: [Jack] Line Out at Ext Rear
Conn = 1/8, Color = Green
DefAssociation = 0x1, Sequence = 0x0
Pin-ctls: 0xc0: OUT HP
Unsolicited: tag=37, enabled=1
Power states: D0 D3
Power: setting=D0, actual=D0
Connection: 1
0x0a
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https://bugs.launchpad.net/bugs/1254884
Title:
Pulseaudio: incoherent muting of GStreamer channels (mutes master,
headphone and speaker, but unmutes only master)
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