EDIT: READ THIS: https://gist.github.com/felipelalli/6179aac72735fd35ea3a9854beb490e5?permalink_comment_id=5685746#gistcomment-5685746

This guide details the process to resolve the lack of sound from the internal speakers on the Lenovo Legion Pro 7 16IRX9H notebook running NixOS. The issue occurs because the default audio driver (snd_hda_intel) fails to correctly initialize the amplifiers for the Realtek ALC287 codec present in this hardware.

The solution involves applying a specific firmware patch declaratively, leveraging the robustness of NixOS.

Thanks to Felipe "Noksys" Lalli for debugging and documenting the solution in his NixOS configuration repository, noksys/genoc.

git log --graph --oneline --decorate $( git fsck --no-reflog | awk '/dangling commit/ {print $3}' )

This will show you all the commits at the tips of your commit graph which are no longer referenced from any branch or tag – every lost commit, including every stash commit you’ve ever created, will be somewhere in that graph.