How to fix microphone on Ubuntu?

Have Ubuntu 18.04. There is a microphone how to separate and built-in USB webcam.
To use the microphone it is necessary after turning on the computer to remove the plug and bring it back, otherwise there is no sound.
To stick in the socket on the rear panel of SIS.unit or on the front - no difference.
I even Google it I can not )) were who?
March 19th 20 at 08:28
1 answer
March 19th 20 at 08:30
Solution
If I restart the ALSA service (or whatever is now in Ubuntu) - microphone will work?
In General, I don't know how it happened.
I googled ALSA, read, then got distracted at work and... and the odd point. Rebooted and worked )) - Dorian87 commented on March 19th 20 at 08:33
@Dorian87, the effect of presence.
So we write for posterity: if you experience similar problems, just write in the comments :) - olin_Bode commented on March 19th 20 at 08:36

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