MPRIS v2.0 standar alows to multimedia players to be controled via DBus from multimedia keys and from diferent desktop environmen'ts places: systray, taskbar, block-screen...
VLC is MPRIS compliant, I don't know why MotionBox (which relays on VLC) can't be controlled (play, pause, next, back) from places mentioned above.
MPRIS v2.0 standar alows to multimedia players to be controled via DBus from multimedia keys and from diferent desktop environmen'ts places: systray, taskbar, block-screen...
VLC is MPRIS compliant, I don't know why MotionBox (which relays on VLC) can't be controlled (play, pause, next, back) from places mentioned above.