Surround speaker connection on Acer 8951G

From: Sergey 'Jin' Bostandzhyan <jin@mediatomb.cc>
To: alsa-devel@alsa-project.org
Subject: Surround speaker connection on Acer 8951G
Date: Thu, 4 Apr 2019 21:24:30 +0200	[thread overview]
Message-ID: <20190404192430.GA24729@xn--80adja5bqm.su> (raw)

Hi,

I am not sure if this is the right place to ask or if I should just
submit a bugreport, but you guys helped me out with a similar problem about 
10 years ago, so I'll try here first. If I'm wrong here, then I apologize,
just let me know.

I have an Acer Aspire Ethos 8951G notebook which has 6 built in speakers for
5.1 surround sound, it's a Realtek ALC669X.

The problem is that only two speakers are recognized by default.

I tried fiddling around with hdajackretast and it does make a difference, but
I somehow could not find a step-by-step approach on how to figure out what is
what and how to map everything correctly, so some guidance would be very much 
appreciated. I even ended up in situations where I got channels supporting 
only mute which would influence muting of other channels, I really got lost 
there..

Here's my alsa-info output:
http://alsa-project.org/db/?f=3adde87164f5fc349c3c78b211ee63e416ebf10b

It would be great if we could figure it out and make it work by default.

Basically that's what we did 10 years ago, back then I had an Acer Aspire 
8920G with a ALC889 which had the same problem that got fixed by you and these 
days it just works out of the box :)

Kind regards,
Jin