Created attachment 1760477 [details]
Description of problem:
After installing Fedora 33 on my laptop (Thinkbook 13s IML) I'm unable to use its internal microphone to record anything. It is recognized by system as "Digital Microphone - sof-hda-dsp", but there is no input from it.
I have tried to record using Sound Recorder - file attached. There is a high noise in the beginning and after that only silence.
I could confirm that microphone works under Windows 10. Also I can use microphone from plugged in headphones.
Created attachment 1760478 [details]
Sound Recorder audio
Created attachment 1760645 [details]
Output from dmesg --level=err,warn
I have tried Fedora 34 Beta 1.2 on the same laptop. Now its microphone listed as "Digital Microphone - Comet Lake PCH-LP cAVS", but the same problem still persists.
Could you enter a bug to the SOF project to reach the Intel developers?
You can put a link to this bug for the alsa-info / dmesg info.
Reported upstream: https://github.com/thesofproject/sof/issues/3929
Found temporary solution here: https://github.com/thesofproject/linux/issues/2460#issuecomment-779212719
When I'm using that custom topology file from the link above built-in microphone works fine.