I met an issue very similar to these ones:
- Amd Renoir CPU: Microphone not working on Kernel 5.10.5 (Manjaro Forum)
- IdeaPad IP 5 14ARE05 (Ryzen 5 4500U) microphone issue (Arch Forum)
(I would like to add URLs but the forum prevents me from using them ATM)
Only differences being my laptop model (hp pavilion 15-eh0005nl), the CPU (Amd Ryzen 4700U) and the Kernel version (5.12.9).
In a nutshell, internal microphone is gone from both Gnome Settings’s Audio menu, and Pavucontrol.
The solutions proposed in the links above (essentially proposing to set
snd_rn_pci_acp3x.dmic_acpi_check=1 on either Grub or
/etc/modprobe.d/alsa-dmic.conf) did not work in my case.
I tried with 2 different Manjaro-KDE live keys:
- one using Kernel 5.10.42
- the other using Kernel 5.10.36-2
The microphone works correctly on the latter, while it is missing from the former.
I’m considering to downgrade the Kernel and stick to version 5.10.36-2 for a while, but that’s of course not a long term solution.