Comment 9 for bug 1939052

Some info is here:
https://github.com/thiagotei/linux-realtek-alc287

You can run a VM using someone's fork of of Qemu (which just adds a bit of logging) with PCIE passthrough of your sound card. Then you can narrow down exactly which verbs are needed.
It seems that some of the people in your linked bug are attempting the exact same method already.

This is all assuming you're simply missing the verb initialization sequence for your laptop's hardware.

For example, the 2021 Lenovo Legion's (both the AMD and Intel models) have a separate issue where the speakers are controlled by a Cirrus Logic (CS35L51) amplifier chip that currently has no support in Linux.

I can't do this, because I don't have this model of laptop, and I don't really have anymore time to dedicate to this.

I've attempted to send the patches upstream. I never got a response. Not even the slightest amount of feedback. Considering this is something I've done on the side and that I have a lot of other responsibilities, I think this is as likely as far as this is going to go.

Good luck on the Lenovo c930.