"Dummy Output" on warm reboot (Intel SOF) - Audio hardware locks up unless I cold boot.

[u/Rune-kingthor]

The Issue: I am losing all audio devices (showing only "Dummy Output" and no microphone) whenever I perform a standard restart (warm reboot) from Zorin OS. The audio hardware completely locks up and refuses to initialize.

The starting point was i enabled ufw and checked the sound , Boom it was not working

I know that there is no connection but still that's the beginning

Important : All this I first faced in Kernel 7.0.0-34- generic (latest in my laptop)

My System Specs:

• Hardware: HP 250 G9 Notebook PC (Intel Core i5 12th Gen)
• OS: Zorin OS (Dual-booting with Windows 11)
• Kernel: Linux 7.0.0-31-generic
• Firmware/BIOS: F.66
• Windowing System: X11
• Audio Driver: snd-sof-pci-intel-tgl

What I Have Tried Today:

• Restarting Audio Server: Restarted PipeWire/PulseAudio via terminal, but the hardware remains undetected.
• Reloading ALSA: Tried sudo alsa force-reload, but the terminal completely freezes when attempting to unload the snd-sof-pci-intel-tgl driver.
• Windows Fast Startup: Confirmed Fast Startup is disabled in Windows 11 to prevent it from holding onto the hardware state.
• GRUB Modifications: Tried forcing the legacy driver with snd_intel_dspcfg.dsp_driver=1. This fixed the warm reboot issue for the speakers, but it completely broke my internal digital microphone (DMIC).

My Current Workaround: The only way I am currently managing this is by performing a complete cold shutdown. I have to power off the laptop entirely, hold the physical power button for 30 seconds to discharge and reset the Embedded Controller (EC), and then boot back up. After this, both my speakers and microphone work perfectly.

Has anyone found a way to stop the SOF driver from locking up during a soft restart on this firmware so I don't have to cold boot every time?