[alsa-devel] Headphone issues iMac 14.1 (A1418)

[Takashi Iwai]

On Wed, 03 Jan 2018 11:39:57 +0100,
Freaky wrote:
> 
> Hi there,
> 
> we're having issues enabling the headphone out on an iMac 14.1 (A1418).
> 
> The parameters snd-hda-intel.model=imac27 or snd-hda-intel.model=imac27_122
> do not resolve the problem.
> 
> Plug detection seems to be working fine, upon plugging the headphone,
> speaker-out will mute and headphone out will unmute. Unplugging it does the
> reverse. There's no audio on the headphone out however.
> 
> We ran the hda analyzer python script and when enabling 'out-dir', 'enable'
> and 'data' on the GPIO's marked as [2] the audio starts working.
> 
> If we unplug/plug the headphone then the audio is dead again. Need to
> uncheck and check them and it will work again.
> 
> Ran alsa-info.sh, whilst the GPIO's marked as [2] were enabled:
> 
> http://www.alsa-project.org/db/?f=86db8b16d0118edd1feab9626c68eed4735b943e

Do you need to enable GPIO[2] for which output?  Does it control both
speaker and headphone outputs, or only one of them?

Also, no pin config change is needed but for GPIO setup?


thanks,

Takashi