try mute the amp out VAL of connection from 0x17 in node 0x10 if node
0x17 is not used

Node 0x10 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
  Control: name="Speaker Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Control: name="Speaker Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Amp-Out caps: ofs=0x2b, nsteps=0x2b, stepsize=0x05, mute=1
  Amp-Out vals:  [0x20 0x20] [0x00 0x00]
  Pincap 0x00010014: OUT EAPD Detect
  EAPD 0x2: EAPD
  Pin Default 0x95170110: [Fixed] Speaker at Int Top
    Conn = Analog, Color = Unknown
    DefAssociation = 0x1, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Power states:  D0 D1 D2 D3
  Power: setting=D0, actual=D0
  Connection: 2
     0x19* 0x17

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https://bugs.launchpad.net/bugs/886975

Title:
  [Thinkpad R61i/T61] Lenovo sound chip Conexant CX20549 Venice doesn't
  work correctly.

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