[nonblockswap] video playing a bit after screen off and after unlock

[kevin gunn]

silo 3 non-block swap mir for Qt5.2 testing

1) navigate to video, play a sample
2) strike power key, screen off - > you'll experience audio(video) continuing to play
3) strike power key, screen on
4) reveal launcher, select ubuntu(BFB), dash should be revealed -> you'll experience a second or 2 of audio(video) playing, then stop

ideally, on 2 the video should pause immediately
on 4, the video should not play

[Daniel van Vugt (vanvugt)]

Incomplete for Mir. Either you want the compositor to block video on sleep (blocking SwapBuffers) or you need to implement pause/resume yourself in the shell/app/platform.

As far as Mir goes, this is the kind of behaviour Unity8 requested, unfortunately.

[Gerry Boland (gerboland)]

We're using the side-channel to ask apps to stop/start their rendering, and other tasks that are unnecessary while not visible. The qtubuntu change I made tells the render loop to stop, but the app needs to decide for itself how if it wants to stop/start anything else.

I need fix qtubuntu to correctly set the value of the Qt.application.state property:
http://qt-project.org/doc/qt-5/qml-qtqml-qt.html#application-prop
and then have applications listen to that.

[kevin gunn (kgunn72)]

after speaking to ChickenCutlass on IRC sounds like this will actually get corrected through the media hub listening for broadcast of Unity.Screen DisplayPowerStateChange in order to take action immediately