There are 2 internal speakers according to the system report in OSX.
Headphones work fine if I put a file with "options snd-hda-intel
model=imac27_122" in /etc/modprobe.d    It is the built in speakers that
don't work.  Headphone detection works.  If I open alsamixer and plug in
the headphones it mutes the speakers, when I unplug them it un-mutes the
speakers.  I just noticed something else interesting: I logged on to the
machine went to settings-->sound--test sound.  The test sounds "Front
Right" and "Front Left"  worked once then did not work again on subsequent
attempts there is no audio from applications and no volume adjust noise.
If I plug in the headphones I get all of the audio I am supposed to through
the headphones.


On Wed, Aug 13, 2014 at 1:03 AM, Raymond <email address hidden> wrote:

> Node 0x0b [Pin Complex] wcaps 0x410101: Stereo
>   Control: name="Speaker Phantom Jack", index=0, device=0
>   Pincap 0x00000050: OUT Balanced
>   Pin Default 0x90100112: [Fixed] Speaker at Int N/A
>     Conn = Unknown, Color = Unknown
>     DefAssociation = 0x1, Sequence = 0x2
>     Misc = NO_PRESENCE
>   Pin-ctls: 0x00:
>   Delay: 1 samples
>   Connection: 1
>
> how many speaker since the node support balanced  mode ?
>
> speaker is muted by the driver when headphone is plugged
>
>
> control.17 {
>                 iface CARD
>                 name 'Headphone Jack'
>                 value true
>                 comment {
>                         access read
>                         type BOOLEAN
>                         count 1
>                 }
>         }
>
> do you mean Jack detection of headphone in incorrect ?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1355984
>
> Title:
>   Built in speakers do not work on iMac 14,2 and iMac 14,4
>
> Status in “alsa-driver” package in Ubuntu:
>   New
> Status in “linux” package in Ubuntu:
>   Incomplete
>
> Bug description:
>   No sound from internal speakers but OK from plugged in headphones.
> Running Xubuntu 14.04 on partitioned  iMac 14,4 which has Intel HD Audio
> (S/PDIF DigitalAudio output). Headphones appear to be using analogue
> output. Both loud and clear using OSX 10.9.4.
>   Have tried all fixes found on many Linux distro websites but no success.
> Also tried installing Lubuntu (no sound at all) Linux Mint 16 & 17 and
> Ubuntu 13.04, 13.10 (same problem as Xubuntu).
>   Have all PulseAudio utils installed, all devices are listed but only
> analogue volume meter shows outputs when playing but as above nothing from
> speakers.
>   AlsaMixer shows S/PDIF (highlighted), SPDIF 1 & S/PDIF 2 not MM, set at
> 00 but cannot be adjusted.
>   What is the problem? I sense there is a simple solution here, if only to
> ger the analogue output via the internal speakers.
>   This is reminiscent of problemsI I had with Unbuntu 12.04 on an earlier
> iMac which were solved simply using AlsaMixer.
>   That I have installed Ubuntu on my new iMac shows how much I prefer
> Linux to OSX, this small problem is spoiling my enjoyment of your great OS.
>   Thank you in anticipation.
>   Ed Hughes
>
>
>   I have the same issue on an iMac 14,2. I think the audio hardware in the
> iMac 14,2 and 14,4 is probably the same. To get the headphones to work I
> upgraded to the daily ALSA snapshot found here:
> https://code.launchpad.net/~ubuntu-audio-dev/+archive/ubuntu/alsa-daily/+packages
>   Neither the headphones or the internal speakers work with the default
> configuration so I did this: # echo "options snd-hda-intel
> model=imac27_122" >> /etc/modprobe.d/imac_local.conf followed by a reboot.
> This fix works on every other Mac I have tested so far, but for this
> machine it only fixes the headphone audio. The output of alsa-info.sh is
> here:
> http://www.alsa-project.org/db/?f=08cf13552b70232c96fea9293fdd54066243d79a
> I have downloaded the HDA Analyzer tool but I can't seem to get the
> internal speakers to work correctly in any consistent way, although they do
> occasionally work correctly for a few seconds. I can consistently make
> sound come from the speakers if I chose VREF = 50 or 80 in Node[0x0d]pin
> but it sounds like I am using a much smaller lower quality speaker when I
> do that. Here is the text dump for that node configuration:
>
>   Node 0x0d [Pin Complex] wcaps 0x41048b: Stereo Amp-In
>     Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>     Amp-In vals: [0x00 0x00]
>     Pincap 0x00001764: IN Detect Balance
>       Vref caps: HIZ 50 GRD 80
>     Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
>       Conn = Unknown, Color = Unknown
>       DefAssociation = 0xf, Sequence = 0x0
>     Unsolicited: tag=0x00, enabled=0
>     Power: setting=D0, actual=D0
>     Delay: 1 samples
>
>   The audio related parts of the output of # sudo lspci -vvnn is:
>
>   00:1b.0 Audio device [0403]: Intel Corporation 8 Series/C220 Series
> Chipset High Definition Audio Controller [8086:8c20] (rev 05)
>    Subsystem: Intel Corporation Device [8086:7270]
>    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: 256 bytes
>    Interrupt: pin A routed to IRQ 51
>    Region 0: Memory at b1c10000 (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: 00000000fee003f8 Data: 0000
>    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-
>    Capabilities: [100 v1] Virtual Channel
>     Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
>     Arb: Fixed- WRR32- WRR64- WRR128-
>     Ctrl: ArbSelect=Fixed
>     Status: InProgress-
>     VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
>      Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
>      Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=01
>      Status: NegoPending- InProgress-
>     VC1: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
>      Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
>      Ctrl: Enable+ ID=2 ArbSelect=Fixed TC/VC=04
>      Status: NegoPending- InProgress-
>    Kernel driver in use: snd_hda_intel
>
>   01:00.1 Audio device [0403]: NVIDIA Corporation GK104 HDMI Audio
> Controller [10de:0e0a] (rev a1)
>    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: 256 bytes
>    Interrupt: pin B routed to IRQ 17
>    Region 0: Memory at b1080000 (32-bit, non-prefetchable) [size=16K]
>    Capabilities: [60] Power Management version 3
>     Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
> PME(D0-,D1-,D2-,D3hot-,D3cold-)
>     Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
>    Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
>     Address: 0000000000000000 Data: 0000
>    Capabilities: [78] Express (v2) Endpoint, MSI 00
>     DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s unlimited, L1
> <64us
>      ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
>     DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
>      RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
>      MaxPayload 256 bytes, MaxReadReq 512 bytes
>     DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
>     LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM L0s L1, Exit Latency L0s
> <512ns, L1 <4us
>      ClockPM+ Surprise- LLActRep- BwNot-
>     LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- CommClk+
>      ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
>     LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive-
> BWMgmt- ABWMgmt-
>     DevCap2: Completion Timeout: Range AB, TimeoutDis+, LTR-, OBFF Not
> Supported
>     DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF
> Disabled
>     LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+,
> EqualizationPhase1+
>       EqualizationPhase2+, EqualizationPhase3+, LinkEqualizationRequest+
>    Kernel driver in use: snd_hda_intel
>
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