So I'm on 17.10 (unstable) and I still have issue with this. But its not the same issue.
Now it simply do not show up in the gnome sound settings. To get 5.1 ac3 output I first need to start pavucontrol then in the Configuration tab select the correct profile in the Built-in Audio section.
Then it shows up in gnome sound setting. But it does not remember it so I have to to this over and over.
So different problem but still an issue. now its showing up in pulseaudio but not in gnome audio.
So I'm on 17.10 (unstable) and I still have issue with this. But its not the same issue.
Now it simply do not show up in the gnome sound settings. To get 5.1 ac3 output I first need to start pavucontrol then in the Configuration tab select the correct profile in the Built-in Audio section.
Then it shows up in gnome sound setting. But it does not remember it so I have to to this over and over.
So different problem but still an issue. now its showing up in pulseaudio but not in gnome audio.