Comment # 28 on bug 1182552 from Kim Frederiksen

(In reply to Takashi Iwai from comment #27)
> Hrm, then I'm not sure what went wrong.
> 
> Just to make things straight: before you start Teams, open pavucontrol, and
> see that Plantronics headset recording works (in "Input Devices", VU meter
> moves with the voice).  Then start Teams, check the test call or such.  At
> this stage, it still works?

After installing the test kernel, I did a poweroff. Upon restart, I started
Teams and pavucontrol at the same time. In pavucontrol there was _no_ VU meter
- hence also Teams test call was unsuccessful (as always, speakers are working,
microphone not).

I did a poweroff again, booted using the 63 kernel with 57 kernel
snd-usb-audio.ko and a Teams test call was successful.

I'll try and get the other requested information tomorrow.