I think there are two possibilities here. One is that this is merely a duplicate of bug 1418210: volume level is reset "anytime a new QAudioOutput is created",
The other is that we have our output roles muddled. I was told that the default role for sound output -- not alarms, not phone calls, and not media playback, but anything else -- was called "alert". So I specified that the volume controls should default to controlling the "alert" volume, switching to another role temporarily only when that other role is being used. <https://wiki.ubuntu.com/Sound?action=diff&rev2=137&rev1=136> Alarms, phone calls, and media playback almost always last for more than a couple of a seconds, so you have time to change their volume. But if apps are -- or whatever audio API apps use is -- by default using some output role that is *not* "alert", then we'd see pretty much what's described here: the volume controls switch to showing that other role, but it's usually too brief for you to change the volume before the control reverts to showing the alert volume. So it *looks* like apps are changing the volume themselves, when really they're just using an output role that you usually don't see the volume of and don't have time to change the volume of. As well as being annoying in itself, the existence of this bug is causing confusion in other bug reports about sound volume UI, particularly bug 1389761, bug 1396986, and bug 1478075. -- You received this bug notification because you are a member of DX Packages, which is subscribed to indicator-sound in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1478506 Title: Apps change system volume all the time Status in Canonical System Image: Confirmed Status in indicator-sound package in Ubuntu: Confirmed Status in pulseaudio package in Ubuntu: Confirmed Bug description: To reproduce, install the app "Maroon in trouble" from the app store and play it a little with having sound enabled. Press the volume down hardware button on the phone. It will temporarily decrease the volume. However, whenever a new item comes into the scene, it will be on 100% volume again. Setting the system volume to 0 should keep everything at 0. Please note that this app does *not* have any code to set the volume! Also this app is one of the upstream Qt QML example demo apps, so this is really how QML apps are supposed to work (in other words, it is not a badly implemented app, but really an issue in the system) To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1478506/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : dx-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp
