[alsa-devel] Spectre x360 fixing the top speakers (again)

[Alex G.]

It's only been since 4.18-rc2 that the speaker issue on the x360 [1] was 
resolved. I didn't even know I had four speakers until seeing that bug 
report. My HP Spectre x360 (13-ae0xx) has the same issue as the original 
x360 with Bang speakers.

The subsystem PCI ID is different [103c:83b9]. Of the two fixes 
developed in [1], only the mute led fix works when the PCI id is added 
to patch-realtek. If I try to add the full ALC295_FIXUP_HP_X360 fix, 
there's no audio coming out at all.

One thing I tried was to boot W10 virtual machine and redirect the audio 
PCI device to the VM:
0:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
It all worked in the VM, but as soon as I shut it down and tried to play 
audio from linux, the top speakers still didn't work. The difference 
being that PAVUcontrol could see a "4.0 output" configuration. The same 
issue: audio sent to the bottom speakers was heard, but audio sent to 
the top speakers was not.

Since I'm likely going to have to change _everything_ anyway, here's 
what I'm trying to achieve:


1) Make the top speakers great again. Whether they produce the same 
sound as the bottom speakers, or have their own audio channel, I don't 
care that much.

2) Be able to use the speakers when something is plugged in the 
headphone jack. Right now it's stupid. I try to plug in a microphone 
(with the proper TRRS jack), and the speakers die. I haven't seen this 
before. I was playing with HDA-Analyzer and was able to get speaker 
sounds with a dummy plugged in the jack, so I know it's possible. I 
don't remember how I did it, and it only worked once.

3) (optional) see if there's a way to use the jack as a line in or 
stereo mic in.

I'm not sure where to start.

Alex

[1] https://bugzilla.kernel.org/show_bug.cgi?id=189331