I have a DELL XPS-8940 and both a usb mic or 3.5mm jack mic do not work.
They are detected by the operating system and listed in Input section of sound
settings, but they do not work, no sound is detected when talking or recording.
*-multimedia
description: Audio device
product: Comet Lake PCH cAVS
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: irq:165 memory:e5418000-e541bfff
memory:e5100000-e51fffff
*-multimedia
description: Audio device
product: TU104 HD Audio Controller
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:17 memory:e5080000-e5083fff
$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC3861 Analog [ALC3861 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 2: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
The strange thing is that the mic on my Logitech Webcam C310 works just
fine.
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https://bugs.launchpad.net/bugs/1912052
Title:
[Acer Spin 5 - SP513-54N] External headset microphone not working on
Ubuntu 20.10 (not even wired, cable headset)
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