[alsa-devel] No audio output via built-in speaker on a MacMini while headphone jack is plugged in

[moosotc at gmail.com]

Takashi Iwai <tiwai at suse.de> writes:

> On Mon, 14 Mar 2016 18:16:11 +0100,
> moosotc at gmail.com wrote:
>> 
>> Takashi Iwai <tiwai at suse.de> writes:
>> 
>> > On Mon, 14 Mar 2016 09:11:10 +0100,
>> > moosotc at gmail.com wrote:
>> >> 
>> >> [1 Output of alsa-info.sh <application/octet-stream (base64)>]
>> >> 
>> >> 
>> >> `amixer set Speaker unmute' makes no difference
>> >> physically unplugging the headphone jack from the socket does, i.e.
>> >> `amixer set Speaker (un)mute' does the right thing.
>> >
>> > Could you give more details?  The description is too concise and
>> > vague.
>> >
>> 
>> I have a script to toggles sound emission by the built-in speaker:
>> 
>> #!/bin/sh
>> amixer get Speaker | grep -q "\[on\]" && onoff="mute" || onoff="unmute"
>> amixer set Speaker $onoff
>> echo "$onoff"
>> 
>> As we speak:
>> 
>> `--> atoggle
>> Simple mixer control 'Speaker',0
>>   Capabilities: pvolume pswitch
>>   Playback channels: Front Left - Front Right
>>   Limits: Playback 0 - 127
>>   Mono:
>>   Front Left: Playback 127 [100%] [0.00dB] [on]
>>   Front Right: Playback 127 [100%] [0.00dB] [on]
>> unmute
>> 
>> This setting is ignored when (i.e. speaker is always silent) if the
>> headphone jack is plugged in.
>> 
>> This used to work in prior kernels, I believe I've shared my bisection
>> results with you in one of the earlier (personal) e-mails, if there's a
>> better way to achieve the desired result (i.e. control sound emission by
>> the speaker regardless of the headphone jack plug-status) I'll happily
>> use that instead.
>
> As mentioned, make sure that you disable auto-mute mode:
>   amixer set "Auto-Mute Mode" "Disabled"
>
> If you still have no speaker output even after that, give alsa-info.sh
> output with non-working state, and also the alsa-info.sh output from
> the working state on the earlier kernel.
>
>
    jack      | speaker | auto-mute | spaker emits sound
000 unplugged | muted   | disabled  | no
001 unplugged | muted   | enabled   | no
010 unplugged | unmuted | disabled  | yes
011 unplugged | unmuted | enabled   | yes
100 plugged   | muted   | disabled  | no
101 plugged   | muted   | enabled   | no
110 plugged   | unmuted | disabled  | no
111 plugged   | unmuted | enabled   | no

alsa-info outputs can be found in the attached archive

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