Digging into the pulse config on 18.10, it looks like instead of using the daemon mode it's trying to setup up some sort of IPC socket, but this isn't getting run correctly:
tessa@viper:~$ systemctl start pulseaudio.socket tessa@viper:~$ systemctl status pulseaudio.socket ● pulseaudio.socket - Sound System Loaded: loaded (/usr/lib/systemd/user/pulseaudio.socket; enabled; vendor preset: enabled) Active: inactive (dead) Condition: start condition failed at Sun 2018-10-21 10:37:45 PDT; 4s ago └─ ConditionUser=!root was not met Listen: /run/pulse/native (Stream) note that it requires a non-root user, but running as more normal user for some reason evaluates to root and fails. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1799007 Title: no sound after 18.10 upgrade Status in pulseaudio package in Ubuntu: New Bug description: After upgrading to 18.10, the sound in my System76 Oryx Pro no longer works, it no longer shows any of the audio output devices, not even the builtin HDMI which usually always shows. Not sure what happened, but this is a major regression and needs to be fixed. Note that this isn't the same as the bug with Timidity taking exclusive soundcard access (https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1797714) as I don't have any timidity packages installed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1799007/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp