Lenovo m720s combined audio jack not working (ALC233)

[Pierre-Louis Bossart]

On 8/4/20 4:56 AM, Bastien Nocera wrote:
> Hey,
> 
> The front audio jack on my newly purchased (but not new) Lenovo m720s
> doesn't make a microphone output appear in PulseAudio when a headset is
> plugged in. The headphone part works correctly though. The "sof-hda-dsp
> Front Headphone" evdev device will switch the state of
> SW_HEADPHONE_INSERT as expected.

I would first try with the HDaudio legacy driver to separate variables. 
This will likely prevent your internal DMICs from working but will help 
you test without UCM.

options snd_intel_dspcfg dsp_driver=1

That way you'll be able to see if the jack detection actually works.

If it doesn't, it's a codec configuration/driver issue.
It it does, it's somehow a PulseAudio/UCM issue. If indeed the 
information is reported as an event then I am leaning to a UCM issue 
with the wrong mixer being used.

> Does anyone know whether the headphones/headset switching is supposed
> to be automatic, or would that trigger a "what did you plug in"
> dialogue as on some Dell machines I've worked with?
> 
> I couldn't find any quirks in sound/pci/hda that would be directly
> related to this problem (eg. Lenovo, ALC233 and mic presence), so I'm a
> bit stumped.
> 
> I've attached the pinout information from alsa-info.
> 
> Any ideas?
> 
> Cheers
> 
>