Hello, for quite some time the "Smart 5.1" function in alsa is not working properly when motherboard has only 3 audio jacks.
Me and Raymond on alsa-bugtracker have been trying to solve the issue for a long time but were unsuccessful.
Please take a look at this alsa bug ticket: https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4895
It contains A LOT of info on the problem + steps that we tried, which included patching the code.
Synthom : NO "Surround" , "Center" and "LFE" Control and switch with VT1708S on a motherboard with 3 audio jacks Also NO surround sound.
speaker-test -c 4 -t wav -Dsurround40
Channels count (4) not available for playbacks: Invalid argument Setting of hwparams failed: Invalid argument
Please advise if you can.
Thank you Best Regards Viliam Kubis