## System details

- **Omarchy:** 3.8.2 (branch `master`)
- **Distro / Kernel:** Arch Linux, `linux 7.0.9-arch2-1`
- **Machine:** LENOVO Yoga Pro 7 14IAH10 (`83KF`, board `LNVNB161216`, BIOS `QGCN31WW` 2025-09-17)
- **CPU:** Intel Core Ultra 9 285H — **arch: Arrow Lake**
- **GPU:** Intel Arrow Lake-P [Arc Pro 130T/140T], `i915`
- **Audio controller:** `00:1f.3` Intel **Arrow Lake cAVS** `[8086:7728]`, driver `sof-audio-pci-intel-mtl`, speaker amps Cirrus Logic CS35L56 (x2)
- **Audio stack:** PipeWire 1.6.5 / wireplumber / pipewire-pulse — all active

(Full `omarchy-debug` available on request — happy to upload to logs.omarchy.org if useful.)

## What's wrong?

On a fresh Omarchy 3.8.2 install on this Arrow Lake laptop there is **no audio at all** — PipeWire only exposes a "Dummy Output" sink. The SOF audio DSP fails to boot because `sof-firmware` is not installed.

### Root cause

`install/config/hardware/intel/sof-firmware.sh` only installs `sof-firmware` on Panther Lake:

```bash
if omarchy-hw-intel-ptl && ! omarchy-hw-match "XPS"; then
  omarchy-pkg-add sof-firmware
fi
```

and `omarchy-hw-intel-ptl` matches a single family:

```bash
lspci | grep -iE 'vga|3d|display' | grep -qi 'panther lake'
```

Arrow Lake (and presumably Lunar Lake / Meteor Lake) don't match, so `sof-firmware` is never installed. On the mainline `linux` kernel `sof-firmware` is only an *optdep* (the script's own comment notes `linux-ptl` previously hard-depped it), so nothing else pulls it in. Result: any non-Panther-Lake Intel SOF laptop on mainline `linux` boots with no audio.

### Kernel log

```
sof-audio-pci-intel-mtl 0000:00:1f.3: SOF firmware and/or topology file not found.
sof-audio-pci-intel-mtl 0000:00:1f.3:  Firmware file: intel/sof-ipc4/arl/sof-arl.ri
sof-audio-pci-intel-mtl 0000:00:1f.3:  Topology file: intel/sof-ipc4-tplg/sof-hda-generic-4ch.tplg
sof-audio-pci-intel-mtl 0000:00:1f.3: Check if you have 'sof-firmware' package installed.
sof-audio-pci-intel-mtl 0000:00:1f.3: error: sof_probe_work failed err: -2
```

### Steps to reproduce

1. Install Omarchy 3.8.2 on an Intel Arrow Lake laptop (e.g. Lenovo Yoga Pro 7 14IAH10) running mainline `linux`.
2. Check audio: `wpctl status` shows only "Dummy Output"; `cat /proc/asound/cards` shows `--- no soundcards ---`.
3. `dmesg | grep sof` shows the `sof_probe_work failed err: -2` error above.

### Fix (confirmed working)

```bash
sudo pacman -S sof-firmware
sudo modprobe -r snd_sof_pci_intel_mtl && sudo modprobe snd_sof_pci_intel_mtl
```

After this, `/proc/asound/cards` shows `sof-hda-dsp` and PipeWire exposes a real `Arrow Lake cAVS Speaker` sink.

### Suggested change

The DSP-detection guard is too narrow. Options, most robust first:

1. **Detect the SOF/cAVS DSP directly** instead of by GPU codename — install `sof-firmware` whenever the `00:1f.3` audio controller binds to a `sof-audio-pci-*` driver / reports as `cAVS`. Future-proof across generations.
2. Extend matching to also cover `arrow lake`, `lunar lake`, and `meteor lake`.
3. Simplest: add `sof-firmware` to the base Intel package set unconditionally (~43 MB; the failure mode of omitting it is total loss of audio).