I'm seeing this bug in Linux Mint 19.1 (Ubuntu 18.04 base). The audio devices do not appear and disappear in the "Sounds" GUI. The workaround I've found is to do this in a terminal:
pulseaudio -k && sleep 5 ; pulseaudio -D
Sometimes this works for hours, and sometimes it works for minutes, after killing/restarting the PulseAudio daemon, as above.
I'm seeing this bug in Linux Mint 19.1 (Ubuntu 18.04 base). The audio devices do not appear and disappear in the "Sounds" GUI. The workaround I've found is to do this in a terminal:
pulseaudio -k && sleep 5 ; pulseaudio -D
Sometimes this works for hours, and sometimes it works for minutes, after killing/restarting the PulseAudio daemon, as above.