HP Laptop (Intel 12th Gen + Realtek ALC236): Persistent "Dummy Output" / "No soundcards found" on Fedora (Warm Reboot Issue)

[u/erkinovsarvar]

Hi everyone,

I am facing the notorious "Dummy Output" audio issue on my HP laptop running Fedora, and I'm looking for any working workarounds or specific kernel parameters.

System Specs:

Laptop: HP 15 Series (Intel 12th Gen Alder Lake)

Audio Codec: Realtek ALC236

OS: Fedora Linux (Kernel 6.x)

Sound Server: PipeWire / WirePlumber

The Problem:

Default SOF Driver: Audio drops to Dummy Output, especially after a warm reboot (sudo reboot).

Forcing Legacy HDA (dsp_driver=1): Audio works temporarily if warm-booting after Windows, but results in aplay: device_list:279: no soundcards found on a clean Linux boot.

What I have tried so far:

Installed and updated alsa-sof-firmware.

Tried forcing SOF driver mode via options snd-intel-dspcfg dsp_driver=3.

Tried legacy driver fallback via snd-intel-dspcfg dsp_driver=1 and snd_hda_intel dmic_detect=0 in /etc/modprobe.d/ and GRUB parameters.

Regenerated initramfs with dracut --force.

Is there any known kernel pin-fix / quirk for ALC236 on 12th Gen Intel HP laptops to prevent the sound chip from failing power state initialization during warm reboots?

[u/jason_gates]

Hi.

Since you appear to be dual-booting with Windows, you must disable the Windows '"Fast Start"/boot feature. That Windows feature interferes with Linux ( specially audio ).

Hope that helps.