No, if I don't use any multimedia apps, I always get the media slider when I press the volume's buttons. A nnyway I solved the problem with the previous users suggestion, so thanks a lot guys!Individual apps can select volume of which sound stream is controlled by multimedia buttons. Usually music players tell the system that the media stream is the one, so as long as you have these apps open in the foreground, it works as you described. But if you close these apps and switch to some others that do not play anything, probably you will control ringer and notofocations volume by multimedia buttons.