#StackBounty: #pulseaudio #alsa #microphone Ubuntu 20.04 Internal Microphone is not working. Input Device drop-down menu is empty in So…

Bounty: 100

Recently I installed Ubuntu 20.04 on my Acer Swift 3 laptop.

The internal microphone doesn’t seem to work. Input Device drop-down menu is empty in Sound settings. But the external mic from earphones is detected and works fine.

Here are a few outputs that might be helpful,

reyansh@acer:~$ cat /proc/asound/card0/codec* | grep Codec
Codec: Conexant Generic
Codec: Intel Icelake HDMI

Multimedia audio controller output from lspci -v command,

00:1f.3 Multimedia audio controller: Intel Corporation Smart Sound Technology Audio Controller (rev 30)
    Subsystem: Acer Incorporated [ALI] Smart Sound Technology Audio Controller
    Flags: bus master, fast devsel, latency 32, IRQ 164
    Memory at 601d160000 (64-bit, non-prefetchable) [size=16K]
    Memory at 601d000000 (64-bit, non-prefetchable) [size=1M]
    Capabilities: <access denied>
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel, snd_sof_pci

Last few lines from /etc/modprobe.d/alsa-base.conf,

#Keep snd-usb-audio from beeing loaded as first soundcard
options snd-usb-audio index=-2
#options snd-hda-intel model=auto
options snd-hda-intel dmic_detect=0

I tried this but no luck.
Any kind of help will be greatly appreciated. Thanks!

Get this bounty!!!

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