I upgraded one of my desktop PCs from Ubuntu Studio 18.04.3 to 19.04.
The most important reason to do that was to try to solve some audio problems.
I don't "catch" some improvement around that audio issues.
Even worst, now I cannot to get more than two stereo channels from the audio card!
When I use:
speaker-test -l 1 -c 8 -t sine -f 440
(Terminal session command line), I just get the standard Left-Front and Right-Front audio channels to sound. The other (surround) channels appears as: "Unused".
I checked the "/etc/pulse/daemon.conf" file and all is fine.
I don't have performed any change into any configuration file!
So... What's wrong here?
How can I fix this?