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external microphone is not working with Lenovo V17 iil 4 pin jack and Lubuntu

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the external microphone of my headest is not recognised in my Laptop (i.e. the sound control says it is not plugged in) and only the external speaker works.

This is my system: -Lenovo V17 IIL Laptop -Lubuntu 20.04.3 LTS

This command cat /proc/asound/card*/codec* | grep Codec gives me:

Codec: Realtek ALC236
Codec: Intel Icelake HDMI

I have tried putting several different options in my /etc/modprobe.d/alsa-base.conf file:

options snd-hda-intel model=headset-mode
options snd-hda-intel model=headset-mic
options snd-hda-intel model=dell-headset-multi

but none of them worked. I can not find my exact soundcard (Realtek ALC236) on this page: https://www.kernel.org/doc/html/latest/sound/hd-audio/models.html so I am not sure, which option to put there. The only improvement until now was, that the systems detects me plugging in the headset which it didnt before putting any

options snd-hda-intel model=dell-headset-multi

options in the alsa-base.conf file. Still, the microfone does not record any sound. Everything is working fine under Windows on the same machine so this most probably is not a hardware issue.

Any suggestions?

mangohost

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