Samsung Galaxy Book4 Pro 14" (NP940XGK) - speakers do not work

[dgunay]

EDIT: for anyone coming across this, here is the outcome of my attempt to reverse engineer the codec configuration: https://github.com/dgunay/galaxy-book4-pro-reverse-engineering

The speakers on the Galaxy Book4 Pro 14" NP940XGK don't work out of the box on Linux. The issue seems very similar to previously reported issues with Galaxy Book2 and Book3 laptop speakers not producing sound despite seeing the volume meter move when sound is being output. #4055

I tried using many of the provided hda-verb scripts but they don't fix the problem - still no sound output.

Bluetooth headphones do work. I haven't tried using the onboard headphone jack yet.

My hunch is that the HDA verb sequence is different and needs to be recaptured for this specific device. I might give this a shot while I'm still in the return window, but it's my first time doing something like this so no promises.

[plbossart]

I presume you've looked at https://thesofproject.github.io/latest/getting_started/intel_debug/suggestions.html for the verb tables?

[dgunay]

I presume you've looked at https://thesofproject.github.io/latest/getting_started/intel_debug/suggestions.html for the verb tables?

I looked at the Reverse-engineer the Windows audio driver section yesterday while rabbit-holing in that direction but not the rest of it. I'll go through it step by step tonight.

Thank you for the very prompt response.

[dgunay]

Ran alsa-info.sh. Results: http://alsa-project.org/db/?f=6105eef8dd841227908a445246a6b2582aff57da

[dgunay]

I followed the steps outlined in Disable SOF on PCI/HDaudio devices to test audio playback. No sounds were produced, again despite the volume monitor showing movement on the output device:

[dgunay]

Followed the Try booting into Windows first, then reboot into Linux step. No dice. Sound works in Windows, continues to not work in Linux. I didn't expect this to work since I booted to Windows quite a bit at first to get firmware updates, but worth a shot.

[dgunay]

I'm going to save the reverse engineering step for later since the other steps look like much lower hanging fruit.

[dgunay]

For Make sure the ME is enabled - I'm not seeing any way of configuring ME in the BIOS for this laptop, and I think I remember Windows Update downloading drivers for Intel ME when I first booted the thing, so I'm going to just assume for now that I have ME and it is enabled.

[dgunay]

Tried Test at the ALSA ‘hw’ device level

I'm not totally sure what to make of the commands mentioned in the guide.

Installing the suggested packages didn't do anything. When I enabled pulseaudio, it actually broke audio in a different way (YouTube videos would no longer play in Firefox until I disabled it). Installing pulseaudio-alsa fixed that, but did not result in sound coming out of the speakers.

[dgunay]

I've done Verify mixer settings multiple times now so I'm pretty sure the mixer isn't muting my speakers.

[dgunay]

Enabled dynamic debugging and ran sudo dmesg | rg -i 'snd|sof|pci'

Maybe someone more knowledgeable than me can glean something from this: https://gist.github.com/dgunay/0eea4dc528c55d30906429e9419d8264

[dgunay]

I'm not really qualified to tell whether the SOF tracing step is necessary yet, but I have sof-logger installed now.

[dgunay]

I don't think Digital mic issues applies to me, so I'm skipping that step.

[dgunay]

Looks like my system does not have ES8336 support according to the output of alsa-info - skipping that step.