Pulseaudio

KDE Phonon Device Preference

If you're using KDE and did restart the Pulseaudio daemon, it's most likely
that KDE Phonon is broken and only shows 'Pulseaudio Daemon' so you can't
select different devices for Notifications, Music, Communication and so on.

Reason is that a module isn't loaded, that would be loaded as part of the login process.
Just run the following as the user which is logged into the desktop:

pactl load-module module-device-manager "do_routing=1"