I've used my MIDI+4 device for quite a while connected to my linux DAW. Primarily to share MIDI devices. I never much used the audio capability but I know it worked. Recently, I think after updating firmware to 2.05, it has quit working completely with linux. As a matter of fact when I plug it in to my linux machine it crashes pulseaudio so that no (normal) audio works. I use fedora 29 and the convenience that the MIDI+4 has brought me for years is hard to live without.
I think I've exhausted my troubleshooting thoughts and was looking for help here. Possibly someone could verify general linux functionality with the latest firmware and such.