Created attachment 254361 [details]
I have a new Inspiron 15 7000 Gaming laptop, subwoofer was working on Windows but not on Linux, neither on Gentoo with kernel 4.9.7 (my setup), neither with latest Fedora Live USB version :/
I am not sure if maybe I am affected by:
I have tried to rely on that changes on enable-lfe-remixing and lfe-crossover-freq for pulseaudio-10 without success
What information would you need to try to solve this? For now, I will attach alsa-info output... but feel free to ask me for more information
It is exactly the same with 4.9.9 :/
Well, I am not sure if this is an issue at driver level or pulseaudio... (it never works, ever without pulseaudio). But if you think this 2.1 setups need to be handled by pulse, please let me know to report to the proper place
Judging from alsa-info.sh output, there is only one speaker pin declared by BIOS.
A subwoofer pin should be set to another pin, e.g. NID 0x1b as on Inspiron 7559.
Could you check whether the patch below works?
Created attachment 254727 [details]
Test fix patch
Wow, yes, it works! :D
The only strange thing I see from gnome-control-center sound panel (i.e from pulseaudio side) is that it works with the "Stereo Analog" profile, but when switching to 2.1 Sorround subwoofer turns down again. And, when selecting 4.1... it works !? :/
Created attachment 254737 [details]
Updated alsa-info output after patching
Anyway, better than current situation (no sound at all in subwoofer without the patch) is... then, maybe it could be committed anyway until clarifying the issue when switching profiles :)
it seems this was fixed at some point (I think it was with newer 4.9.x kernels) :)