Bug 208763

Summary: Lenovo 14ARE05 Internal Microphone not working
Product: Drivers Reporter: Alex Maras (dev)
Component: Sound(ALSA)Assignee: Jaroslav Kysela (perex)
Status: RESOLVED PATCH_ALREADY_AVAILABLE    
Severity: normal CC: theorlangur
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 5.7.11-arch1-1 Subsystem:
Regression: No Bisected commit-id:

Description Alex Maras 2020-08-01 07:35:39 UTC 
The internal microphone input is not working with a Lenovo 14ARE05.

I have disabled pulseaudio in order to test. ALSA shows a "Capture" meter as well as 2 "Mic Boost" meters. Increasing any of these and ensuring "Capture" is enabled has not helped. 

I've run alsa-info.sh, results here: http://alsa-project.org/db/?f=cdc89e314d1d213595ded34fb6721e3317d2cc2b

I've tested with arecord, which just seems to just get light noise (less with higher sample rates). Audio output works perfectly. Running audacity and trying to record shows an error determining sample rate. No other applications are successfully detecting a microphone. pavucontrol when pulseaudio is running just shows "microphone (unplugged)"

I've also tried with 5.8rc7 via the arch-mainline package in the AUR. No change there.
Comment 1 Alex Maras 2020-08-01 10:37:44 UTC 
Just a clarification - I imported the arecord-created file, and can confirm there's absolutely no sound recording. The light noise I heard must have just been speakers activating.
Comment 2 Theorlangur 2020-08-10 09:51:59 UTC 
Didn't work for me in 5.7 but works with 5.8 (5.8.0-2 on Manjaro)

also-info.sh here: http://alsa-project.org/db/?f=ec99d2e55ad0fa34bd0c00fcae79df0678283a09

Is this possibly the relevant commit that should've addressed the issue:
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/commit/?h=for-5.8&id=bc5c7f55f5ea91e137fc7939435ed2e2bb6e5a15

?
Comment 3 Alex Maras 2020-08-10 13:58:00 UTC 
Updated alsa-info.sh from 5.8.0.1-mainline aur package: http://alsa-project.org/db/?f=acee22c67fdb9b99d86988600d39c880184683a3 - no change from 5.7 for me.
Comment 4 Alex Maras 2020-08-10 14:20:03 UTC 
Ah, 5.8 from the testing repo in arch has fixed the issue - looks like the kernel config was missing necessary modules in the AUR package.