Finally found the reason why. There were multiple active-input-changed signals being sent which was causing the stop and create monitoring methods to get muddled. Fixed in commit http://bazaar.launchpad.net/~cjcurran/+junk/soundnua-gtk-warnings/revision/19
** Changed in: gnome-control-center (Ubuntu) Status: In Progress => Fix Committed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/987626 Title: peak detection on input tab doubles up on level Status in “gnome-control-center” package in Ubuntu: Fix Committed Bug description: To recreate: 1. Open input tab. 2. Connect alternative input device 3. Move between streams. Expected behaviour: - input peak detection accurately represents input level Instead the peak detection will represent the summed level from all devices which at one point it was expected to monitor. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/987626/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp