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I am trying to use a Jabra 40 Evolve Mono Headset on a Lenovo Thinkpad E490 running Ubuntu 20.04 LTS. The headset comes with a 3.5mm jack and an 3.5mm-to-USB adapter. After finding this question, I tried out several things that highly upvoted answer suggested, but to no avail. In particular, I edited /etc/modprobe.d/alsa-base.conf and added the line

options snd-hda-intel model=auto

since I couldn't find the drivers on kernel.org. Now the behaviour is as follows:

When I plug it in the 3.5mm jack, the output works fine but the microphone is not detected.

When I plug it in through USB, output works and the microphone is detected, however when I go to settings/sound and try to test it, no signal is detected in the input section. However, weirdly, when I'm speaking I'm getting some signals in the output section:

enter image description here Note that I get this result by speaking, without any music or sound playing.

user159517
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  • Is the "multichannel input" the only (Jabra named) input listed? What you called "3.5mm-to-USB adapter" is actually the other way around and not really an adapter. It's a full-featured external USB generic audio device (available at AliExpress for ~$1), an additional sound card. As such, depending on the chipset, it may show different inputs/outputs but only a couple will be usable. – ChanganAuto Mar 09 '22 at 15:57
  • @ChanganAuto there is another input which is named "Microphone - Jabra EVOLVE LINK". With that I don't get any result. – user159517 Mar 09 '22 at 16:40

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