Headphone Jack Not Working on Arch Linux (SOF RT5682 Jasper Lake)

[Ohene-Nyanteh]

Describe the bug

On my Chromebook Landrid rev7, speakers work perfectly under Arch Linux with SOF firmware, but the headphone jack either outputs no sound or a continuous high-pitched noise. Auto-switching between speakers and headphones does not work.

There is no official UCM for sof-rt5682 in ALSA upstream (alsa-ucm-conf), which is likely the root cause.

Distro name and version
Arch Linux

Boardname
Landrid

Logs
These are the logs
debug-logs-Landrid-2026-03-05_21h52m.tar.gz