Thank you for reporting this bug to Ubuntu. Ubuntu 15.04 (vivid) reached end-of-life on February 4, 2016.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. ** Changed in: pulseaudio (Ubuntu) Status: New => Incomplete -- 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/1482975 Title: Any sound activity unmutes system volume Status in pulseaudio package in Ubuntu: Incomplete Bug description: Chrome with html5 video, Firefox with Flash, Totem with mp3 — everything unmutes the system sound if it was muted before. Imagine how annoying it is whenever I want to keep silence and something starts playing aloud. UbuntuRelease: 15.04 Pulseaudio: 1:6.0-0ubuntu6 kernel: 3.19.0-26-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1482975/+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