The volume is very low, and the command `alsamixer -c 1 -V capture` gives `cannot load mixer controls: Invalid argument`. Also, in `alsamixer`, after pressing F6, selecting the onboard sound card gives the same error message.
From 2020-04-06. With the lts kernel, the sound is back to normal.
Might be the dup of bug 207139. Please try the patch there.