ASUS Zenbook S14 UX5406AA - No speakers sound/audio in Arch Linux (solved)

[ger5ones]

ASUS Zenbook S14 UX5406AA (SSID 1043:1464, Panther Lake) declara um RT722 fantasma (025d:0722, UNATTACHED) no SoundWire link 3 via SSDT. Ele colide o DAI SDW3-Playback-SimpleJack com o CS42L43 real, fazendo o registro do card falhar com -EEXIST / sof_sdw probe ... -12 na default machine + function topologies.

Workaround: override ACPI forçando _STA = 0 em _SB.PC00.HDAS.IDA.SNDW.SWD0. Pedido: quirk de DMI que ignore o periférico não-atttachado, ou que filtre peers UNATTACHED ao montar a máquina dinâmica.

Solved with the help of both Gemini (even if wrong because Claude started from where Gemini got stuck) and completely by Claude/Opus 4.8.

Sorry, I'm not a dev nor a github active user but as I didn't find the solution anywhere, I wanted to share it here (asked Opus 4.8 to compile the steps taken):
asus-zenbook-speakers.html