There have been pulse audio updates since I reported this, and after today's updates (and deleting ~/.config/pulse), the two computers that had the problems now correctly output sound from the speakers.
-- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to pavucontrol in Ubuntu. Matching subscriptions: Ubuntu Studio Bugs https://bugs.launchpad.net/bugs/1766956 Title: Sound has stopped working after today's update Status in pavucontrol package in Ubuntu: New Bug description: I had an alert to do an update today from the software-updater so I went ahead as usual and did the update. As a result I now find that I get now sound out of my speakers. This is true on this machine and on another machine that has the same Ubuntu version (but slightly different hardware & different speakers). In the pavucontrol when music or video is playing I have checked that nothing is muted. And I used alsamixer to turn off any muting there. And in fact there is only one sound output device (my speakers) and the sound is being shown since the indicator that shows decibels shows continual movement. So actually, I don't think this is a bug in pavucontrol but in the sound system generally, but the bug report tool only lets you specify an actual package. $ lsb_release -rd Description: Ubuntu 16.04.4 LTS Release: 16.04 $ apt-cache policy pavucontrol pavucontrol: Installed: 3.0-3build1 Candidate: 3.0-3build1 Version table: *** 3.0-3build1 500 500 http://gb.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: pavucontrol 3.0-3build1 ProcVersionSignature: Ubuntu 4.4.0-121.145-generic 4.4.117 Uname: Linux 4.4.0-121-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.16 Architecture: amd64 CurrentDesktop: XFCE Date: Wed Apr 25 20:13:27 2018 InstallationDate: Installed on 2015-11-05 (902 days ago) InstallationMedia: Xubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) ProcEnviron: LANGUAGE=en_GB:en PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: pavucontrol UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pavucontrol/+bug/1766956/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : ubuntustudio-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp