[alsa-devel] [REGRESSION] Headphones no longer working on MacPro6, 1 with 4.4

[Laura Abbott]

On 05/24/2016 10:54 AM, Takashi Iwai wrote:
> On Tue, 24 May 2016 18:41:06 +0200,
> Laura Abbott wrote:
>>
>> Node 0x10 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
>>   Control: name="Headphone Playback Switch", index=0, device=0
>>     ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>>   Amp-Out caps: ofs=0x42, nsteps=0x42, stepsize=0x03, mute=1
>>   Amp-Out vals:  [0x42 0x42]
>>   Pincap 0x0000001c: OUT HP Detect
>>   Pin Default 0x002b4020: [Jack] HP Out at Ext N/A
>>     Conn = Comb, Color = Green
>>     DefAssociation = 0x2, Sequence = 0x0
>>   Pin-ctls: 0xc0: OUT HP
>>   Unsolicited: tag=01, enabled=1
>>   Power states:  D0 D3 EPSS
>>   Power: setting=D3, actual=D3
>
> This pin is powered off, because...
>
>> 	control.18 {
>> 		iface CARD
>> 		name 'Mic Jack'
>> 		value false
>> 		comment {
>> 			access read
>> 			type BOOLEAN
>> 			count 1
>> 		}
>> 	}
>> 	control.19 {
>> 		iface CARD
>> 		name 'Line Out Phantom Jack'
>> 		value true
>> 		comment {
>> 			access read
>> 			type BOOLEAN
>> 			count 1
>> 		}
>> 	}
>> 	control.20 {
>> 		iface CARD
>> 		name 'Headphone Jack'
>> 		value false
>
> The headphone jack isn't detected.
> Meanwhile,
>
>> 	control.22 {
>> 		iface CARD
>> 		name 'SPDIF Jack'
>> 		value true
>
> SPDIF jack is detected.  This might confuse PA.
>
> In anyway, the alsa-info.sh output you gave doesn't help for analyzing
> the issue while the headphone is plugged.  It is off when unplugged.
> It's the designed behavior.
>
> So, please give the information during the headphone is plugged (but
> still doesn't produce the sound from the headphone).
>
>
> Takashi
>

According to the reporter:

"Actually, that information was when the headphones were plugged in,
but the detection is incorrect.  (Linux thinks the headphones are
unplugged, when they are actually plugged in."

Thanks,
Laura