Headphone automute not working

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Hello all.

Firstly. My apologies if thi is the wrong place to ask about this but I've been try to resolve this issue for some weeks now with no success.

My problem is that when I plug the headphones in, the sound is not muted to the speakers. Instead, the speaker volume is increased and the sound is somewhat distorted.

Without the headphones, the speaker sound is just fine. Sound through the headphones is also fine.

The box is an old Fujitsu ESPRIMO desktop model E5005. The card uses the ALC260 codec and is as follows;

00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 01)
    Subsystem: Fujitsu Technology Solutions Device 1083
    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 0, Cache Line Size: 32 bytes
    Interrupt: pin A routed to IRQ 40
    Region 0: Memory at f0000000 (64-bit, non-prefetchable) [size=16K]
    Capabilities: [50] Power Management version 2
        Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
        Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
    Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Address: 00000000fee0100c  Data: 41c1
    Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00
        DevCap:    MaxPayload 128 bytes, PhantFunc 0
            ExtTag- RBE-
        DevCtl:    Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
            RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
            MaxPayload 128 bytes, MaxReadReq 128 bytes
        DevSta:    CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
    Kernel driver in use: snd_hda_intel

I have used all the different "model=" options for the snd-hda-intel module to now avail. I notice that the lastest ALSA git version of the HD-Audio-Models.txt file has "N/A" listed under ALC260.

Attached is the result of "cat /proc/asound/card0/codec#2". The output from alsa-info.sh can be found at  http://www.alsa-project.org/db/?f=c12a62b4acf32f59dc68ced4dd7ffb310edb03b0

I have two identical boxes exhibiting this same behaviour. One is running Ubuntu 14.04 and the other is running OpenSuSE 12.3 with upgraded ALSA. On the SuSE box, I tried installing version 13.1 but there was no difference between it and the one running the upgraded 12.3.

Thank you for your time.

Kind Regards - AK.



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