# No analog audio on MECHREVO YAOSHI (Panther Lake) — Senary SN6245 SoundWire codec unsupported

## Summary

On Omarchy 4.0.1, a **MECHREVO YAOSHI** (Intel Core Ultra 7 356H / Panther Lake) has silent internal speakers. SOF firmware boots, but the ACPI-reported SoundWire codec (`mfg_id 0x0496` / `part_id 0x6245`, Senary SN6245) is not in the kernel SoundWire codec/machine tables. The driver falls back to HDMI-only `skl_hda_dsp_generic`. PipeWire ends up on `auto_null` (Dummy Output).

This is **not** an Omarchy config / PipeWire bug. It is an upstream kernel + vendor gap. Filing here so Omarchy can track this hardware as currently unsupported, distinct from the Cirrus PTL issues.

Upstream SOF tracker (open, no patch): https://github.com/thesofproject/linux/issues/5885

## System

- **Machine:** MECHREVO YAOSHI Series / Standard, SKU 0001
- **BIOS:** `N.1.05MRO13` (2026-06-18)
- **CPU:** Intel Core Ultra 7 356H (Panther Lake)
- **Audio PCI:** `8086:e328` Intel Core Ultra (Series 3) HD Audio, subsystem `1d05:30b3` (AIstone Global Limited)
- **Codec:** Senary Technology SN6245 over SoundWire link 3 (`mfg_id 0x0496`, `part_id 0x6245`, version `0x3`). Windows enumerates SN6245 AMP / MIC / UAJ.
- **Kernel:** `7.1.9-arch1-2` (`linux 7.1.9.arch1-2`)
- **Firmware:** `sof-firmware 2025.12.2-1` (ADSPFW 2.14.1.1 boots), `linux-firmware 20260810-2`
- **Userspace:** Omarchy `4.0.1-1`, pipewire `1.6.8`, wireplumber `0.5.15`
- **Driver in use:** `sof-audio-pci-intel-ptl`

## Symptoms

- Internal speakers silent. No analog / headphone PCM.
- `pactl get-default-sink` → `auto_null`.
- `aplay -l` shows only HDMI on `sof-hda-dsp` (plus NVIDIA HDMI). No analog device.
- DSP firmware loads cleanly. No SOF firmware errors.

## Root cause (from `journalctl -b -k`)

```
sof-audio-pci-intel-ptl 0000:00:1f.3: No SoundWire machine driver found for the ACPI-reported configuration:
sof-audio-pci-intel-ptl 0000:00:1f.3: link 3 mfg_id 0x0496 part_id 0x6245 version 0x3
sof-audio-pci-intel-ptl 0000:00:1f.3: part id 0x6245 is not supported
sof-audio-pci-intel-ptl 0000:00:1f.3: hda codecs found, mask 4
sof-audio-pci-intel-ptl 0000:00:1f.3: using HDA machine driver skl_hda_dsp_generic now
sof-audio-pci-intel-ptl 0000:00:1f.3: Topology file:     intel/sof-ipc4-tplg/sof-hda-generic-idisp.tplg
sof-audio-pci-intel-ptl 0000:00:1f.3: Loaded firmware library: ADSPFW, version: 2.14.1.1
sof-audio-pci-intel-ptl 0000:00:1f.3: Booted firmware version: 2.14.1.1
```

Mainline `sound/hda/codecs/senarytech.c` only supports the **HDA** SN6186 (`0x1fa86186`). There is no SoundWire codec driver / `soc_sdw_utils.c` entry / SOF topology for `0x0496:0x6245`.

## Not a duplicate of existing Omarchy audio issues

Searched `audio`, `sound`, `SOF`, `SoundWire`, `Panther`, `Dummy`, `speaker`, `YAOSHI`, `Senary`, `6245`. Closest:

- [#5557](https://github.com/basecamp/omarchy/issues/5557) — ASUS UX5406AA PTL + **Cirrus CS42L43/CS35L56**. Different codec; that path has upstream PRs.
- [#6001](https://github.com/basecamp/omarchy/issues/6001) — ThinkPad X1 Carbon Gen 14 PTL + **CS42L45**.
- [#6110](https://github.com/basecamp/omarchy/issues/6110) — Arrow Lake Dummy Output because **sof-firmware was not installed**. Here firmware boots.

Same vendor family, different part: [thesofproject/linux#5832](https://github.com/thesofproject/linux/issues/5832) (Senary `0x6244` on Wildcat Lake). Intel collaborator `@bardliao` (2026-07-08): the codec vendor must upstream the machine driver in `sound/soc/sdw_utils/soc_sdw_utils.c`; otherwise they cannot support it.

## What I've ruled out

- Not PipeWire/WirePlumber config — no analog PCM exists in the kernel.
- Not missing `sof-firmware` — ADSPFW 2.14.1.1 loads.
- Not mute/mixer — HDMI-only topology, no analog controls.
- Kernel bump 7.1.8 → 7.1.9 did not change the match failure.

## Reproduce

1. Install Omarchy on MECHREVO YAOSHI (PTL, audio PCI `8086:e328` / SSID `1d05:30b3`).
2. Boot.
3. `journalctl -b -k | grep 6245` → `part id 0x6245 is not supported`.
4. `pactl get-default-sink` → `auto_null`.

## Diagnostics

dmesg + alsa-info: https://gist.github.com/jfdnet/f59e0b9e3263c3f06435eaa622fc06cf

## Asks

Omarchy cannot fix this locally (no quirk/topology exists to backport). Useful outcomes:

1. Track this machine as **no analog audio until Senary upstreams SN6245 SoundWire** (codec + machine table + topology).
2. Do not conflate with the Cirrus PTL work in #5557 / linux-ptl.

Contacting Senary separately (`[email protected]` / `[email protected]`) with the same diagnostics and Intel's request in #5832.

Filed by grok-4.6 via omp.