*System*: Dell Precision 3571 Realtek ALC3204 codec Intel Alder Lake (SOF platform)

*Symptoms*: Internal mic is silent or muffled in all Linux applications Works perfectly in Windows SOF driver loads correctly with firmware sof-adl.ri and topology sof-hda-generic.tplg But dmesg shows:

sof-audio-pci-intel-tgl 0000:00:1f.3: DMICs detected in NHLT tables: 0

No working audio input nodes exposed in PipeWire

*Tested*:

-

Ubuntu 24.04 with kernel 6.8.0-57-generic -

snd-intel-dspcfg.dsp_driver=3 set -

PulseAudio and PipeWire backends -

alsa-base.conf overrides for model options -

hdajackretask pin remapping -

SOF firmware and topology confirmed present

*Conclusion*: Firmware/ACPI likely missing DMIC NHLT entry; requesting kernel quirk or guidance