[ADL] DMIC pipeline stops after first buffer on Lenovo IdeaPad Slim 3 14IAH8 (ALC257, NHLT reports 0 DMICs)

[ghanirahmans]

[ADL] DMIC pipeline stops after first buffer on Lenovo IdeaPad Slim 3 14IAH8 (ALC257, NHLT reports 0 DMICs)

System Information

Field	Value
Machine	Lenovo IdeaPad Slim 3 14IAH8 (83EQ)
CPU	Intel Core i5-12450H (Alder Lake-P)
Codec	Realtek ALC257 (PCI SSID 17aa:38b6)
Kernel	6.19.8-200.fc43.x86_64
Distro	Fedora 43 Workstation
SOF Firmware	sof-adl.ri version 2:2:0-57864 (alsa-sof-firmware 2025.12.2)
Topology	sof-hda-generic-2ch.tplg
PipeWire	1.4.10

DSP Power State During Recording

DSP remains active throughout — confirmed by monitoring /sys/bus/pci/devices/0000:00:1f.3/power/runtime_status every second during a 10-second recording. Power management is not the cause.

ALSA Mixer State

Dmic0 Capture Volume:  70/70 [100%] [20.00dB] [on]
Capture Volume:        63/63 [100%] [30.00dB] [on]

All relevant mixer controls are unmuted and at maximum volume.

UCM Status

• alsa-ucm-utils installed
• UCM profile sof-hda-dsp active
• alsa.components includes cfg-dmics:2
• device.profile.name = "HiFi: Mic1: source" (Digital Microphone correctly mapped)

What Has Been Tried

• snd_sof_intel_hda_generic.dmic_num=2 — parameter accepted, value confirmed = 2
• snd_sof.tplg_filename=sof-hda-generic-2ch.tplg — topology loads correctly
• alsa-ucm-utils installed — UCM now correctly identifies DMIC as Mic1
• Disabling PipeWire and testing raw ALSA — same result
• Increasing autosuspend_delay_ms to 10000 — no effect
• amixer sset 'Capture' cap — already on
• amixer sset 'Dmic0' on — already on

Expected Behavior

DMIC should capture audio continuously throughout the recording session, not just in the first buffer frame.

Additional Notes

This appears to be a firmware-level issue in sof-adl.ri where the DMIC pipeline produces data only for the first DMA buffer and then stops, despite the DSP remaining active. The behavior is reproducible on both device 6 (48kHz) and device 7 (16kHz), suggesting the issue is in the DMIC capture pipeline initialization, not in a specific PCM device.

The BIOS NHLT bug (reporting 0 DMICs) may be related — the firmware may not be handling the dmic_num override path correctly for the capture pipeline lifecycle.

nyyhms@fedora:~$ sudo dmesg | grep -i "sof\|hda" | grep -v "Command\|Kernel\|software\|integrity" > /tmp/full-dmesg-audio.txt
cat /tmp/full-dmesg-audio.txt
[    0.466485] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    6.656636] sof-audio-pci-intel-tgl 0000:00:1f.3: enabling device (0000 -> 0002)
[    6.656832] sof-audio-pci-intel-tgl 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if 0x040100
[    6.656896] sof-audio-pci-intel-tgl 0000:00:1f.3: bound 0000:00:02.0 (ops intel_audio_component_bind_ops [i915])
[    6.663974] sof-audio-pci-intel-tgl 0000:00:1f.3: use msi interrupt mode
[    6.748448] sof-audio-pci-intel-tgl 0000:00:1f.3: hda codecs found, mask 5
[    6.748454] sof-audio-pci-intel-tgl 0000:00:1f.3: using HDA machine driver skl_hda_dsp_generic now
[    6.748456] sof-audio-pci-intel-tgl 0000:00:1f.3: NHLT device BT(0) detected, ssp_mask 0x4
[    6.748457] sof-audio-pci-intel-tgl 0000:00:1f.3: BT link detected in NHLT tables: 0x4
[    6.748458] sof-audio-pci-intel-tgl 0000:00:1f.3: DMICs detected in NHLT tables: 0
[    6.803509] sof-audio-pci-intel-tgl 0000:00:1f.3: Firmware paths/files for ipc type 0:
[    6.803514] sof-audio-pci-intel-tgl 0000:00:1f.3:  Firmware file:     intel/sof/sof-adl.ri
[    6.803515] sof-audio-pci-intel-tgl 0000:00:1f.3:  Topology file:     intel/sof-tplg/sof-hda-generic-2ch.tplg
[    6.825714] sof-audio-pci-intel-tgl 0000:00:1f.3: Firmware info: version 2:2:0-57864
[    6.923941] sof-audio-pci-intel-tgl 0000:00:1f.3: Firmware info: version 2:2:0-57864
[    7.021667] sof-audio-pci-intel-tgl 0000:00:1f.3: loading topology: intel/sof-tplg/sof-hda-generic-2ch.tplg
[    7.035466] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: Parent card not yet available, widget card binding deferred
[    7.095222] snd_hda_codec_alc269 ehdaudio0D0: ALC257: picked fixup  for PCI SSID 17aa:38b6
[    7.096158] snd_hda_codec_alc269 ehdaudio0D0: autoconfig for ALC257: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
[    7.096166] snd_hda_codec_alc269 ehdaudio0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[    7.096170] snd_hda_codec_alc269 ehdaudio0D0:    hp_outs=1 (0x21/0x0/0x0/0x0/0x0)
[    7.096172] snd_hda_codec_alc269 ehdaudio0D0:    mono: mono_out=0x0
[    7.096174] snd_hda_codec_alc269 ehdaudio0D0:    inputs:
[    7.096177] snd_hda_codec_alc269 ehdaudio0D0:      Internal Mic=0x12
[    7.096179] snd_hda_codec_alc269 ehdaudio0D0:      Mic=0x19
[    7.139826] skl_hda_dsp_generic skl_hda_dsp_generic: hda_dsp_hdmi_build_controls: no PCM in topology for HDMI converter 3
[    7.162089] input: sof-hda-dsp Mic as /devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input16
[    7.162189] input: sof-hda-dsp Headphone as /devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input17
[    7.162216] input: sof-hda-dsp HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input18
[    7.162253] input: sof-hda-dsp HDMI/DP,pcm=4 as /devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input19
[    7.162278] input: sof-hda-dsp HDMI/DP,pcm=5 as /devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input20
nyyhms@fedora:~$