[BUG] snd-hda-codec-realtek.ko missing from kernel packages (6.18.x LTS, 6.19.x)

[darthsus]

Pre-flight checklist

• I have searched existing issues and this is not a duplicate.
• I have read the Contributing Guidelines.
• I have verified the issue is reproducible with the latest available CachyOS kernel.

Upstream / vanilla kernel check

I was unable to test with a vanilla/upstream kernel

Kernel variant

Other (specify in description)

System information (cachyos-bugreport.sh)

https://paste.cachyos.org/p/90097ae.log

Manual system information (if cachyos-bugreport.sh is unavailable)

Bug description

Onboard Realtek ALC1200 audio (MSI B550 MAG Tomahawk) not working on any tested kernel variant. The module snd-hda-codec-realtek.ko.zst is missing from the kernel package. Only snd-hda-codec-realtek-lib.ko.zst is present. Likely caused by the upstream path change from sound/pci/hda/ to sound/hda/codecs/realtek/ in kernel 6.17+.

Steps to reproduce

1. Install any current CachyOS kernel (tested: 6.19.9-1-cachyos, 6.19.9-1-cachyos-bore, 6.18.19-1-cachyos-lts)
2. Run: find /lib/modules/$(uname -r) -name "snd-hda-codec-realtek"
3. Only snd-hda-codec-realtek-lib.ko.zst is present, main module is missing
4. Run: sudo modprobe snd_hda_codec_realtek → "Module not found"

Expected behavior

snd-hda-codec-realtek.ko.zst should be present and onboard Realtek audio should work.

Actual behavior

Module is missing, onboard audio not detected, only HDMI audio available via aplay -l.

Logs / stack traces

Additional system information

CONFIG_SND_HDA_CODEC_REALTEK=m confirmed via /proc/config.gz — module is configured but not shipped. Architecture: x86-64-v3, DE: KDE Plasma, Realtek ALC1200 onboard codec (MSI B550 MAG Tomahawk).

[1Naim]

snd-hda-codec-realtek.ko.zst

This module simply doesn't exist. Realtek codec modules are split between different devices (and its compatible variants).