[MX4] Hardware Volume Control Buttons active when screen off

[Dave Haynes]

The hardware volume control buttons seem to be always active, even if the screen is off, or if the device is locked.
If not a bug, this seems a very poor UI design, and needs at least a user configuration option. It's very easy to turn the ringing volume down or off without knowing it has been done.

The real issue is when the phone is suspended, we do not want Vol buttons active. These inputs should not cause the phone to resume.

If the phone is locked but playing music, it is still awake and vol buttons should work.

[Pat McGowan (pat-mcgowan)]

The fix is likely in the kernel to disable these events as wakeup sources, but will start here

[Andrea Bernabei (faenil)]

At the same time, we don't want to just disable the hardware buttons when the device is locked, because they're often used to change volume of the music (for instance) while the device is in your pocket.

What I agree with, is that we should have a setting that prevents the ringer/alarm volume to be affected by volume hw keys while the device is locked (while still affecting media/video/apps volume!). I think iOS, for instance, has this feature.