Headphone jack (3.5mm) silent on Alienware 18 with sof-arl-rt722 — speakers work

alsa-project/alsa-ucm-conf issue #766 was opened from d0mm392:

Hardware:

Alienware 18 (Area_51M AA18250-0M66RF)
Audio: Intel SOF + rt722 (headphone/mic) + rt1320 (speaker) via SoundWire
Kernel: 7.0.1 / 7.0.5 / 7.0.9 nobara.fc43 (all same behavior)
alsa-sof-firmware: 2025.12.2-1.fc43

Problem:
3.5mm headphone jack produces no audio. Laptop speakers work fine.
Findings:

Jack detection works correctly — evtest /dev/input/event26 confirms SW_HEADPHONE_INSERT events fire on plug/unplug
PipeWire routes to Headphones__sink (status: RUNNING), all mixer controls at 100%, nothing muted
Topology ABI mismatch at boot: Topology ABI 3:29:1 vs Kernel ABI 3:23:1
UCM profile bugs in /usr/share/alsa/ucm2/sof-soundwire/rt722.conf:

EnableSequence references 'Headphone Switch' — control doesn't exist (actual: 'Headphone')
JackControl "Headphone Jack" — doesn't exist (kernel registers it as "Headset Jack")


Tested: module reload, alsactl init, UCM patch — no change

dmesg:
sof-audio-pci-intel-mtl: loading topology: sof-arl-rt722-l0_rt1320-l2.tplg
Topology: ABI 3:29:1 Kernel ABI 3:23:1
sof_sdw: ASoC: Parent card not yet available, widget card binding deferred

Issue URL     : https://github.com/alsa-project/alsa-ucm-conf/issues/766
Repository URL: https://github.com/alsa-project/alsa-ucm-conf