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yesterday March 18th 2020, I made an Ubuntu update and both the sound and the microphone stopped working. I tried to perform a complete reinstallation, but nothing to do. Until the day before, everything worked properly. Ubuntu 18.04 operating system. Computers: Lenovo Yoga C930. Thanks a lot

user299819
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    Does this answer your question? [Ubuntu 18.04 audio disappeared after update](https://askubuntu.com/questions/1218041/ubuntu-18-04-audio-disappeared-after-update) – guiverc Mar 20 '20 at 02:43

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It's a kernel bug > 5.3.0-40.

Add options snd-hda-intel dmic_detect = 0 in the /etc/modprobe.d/alsa-base.conf.

After adding the line to the config file reboot works: the audio problem is solved, NOT the mic problems.....

user299819
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