In order to compensate for this, you can enable this option to not to stop and restart. You can activate this option in Preferences -> Keyboard and mouse. This can happen every time audio over HDMI is stopped and resumed. That means that those keys will work even when SMPlayer is in the background. SMPlayer is a free video and audio player for both Windows and Linux that allows you to play almost all media files without having to install additional codecs.

If your laptop doesn’t have an HDMI port, you will need an HDMI adaptor. I have a Acer aspire laptop and a toshiba LCD TV and what Ive found out is. Now it's possible to use the media keys (play/pause, stop, volume+/-, etc.) as global shortcuts. Plug one end of the HDMI cable into your laptop’s HDMI port.

May I add to this thread how I solved my 'no sound issues' even after having everything the way it should be and seeing the volume bar flashing as if the sound should be working!! It drove me crazy for 3 days.sometimes it worked sometimes it didn't and after scouring forums and the like to find a solution I finally found a clue.

Smplayer stops with hdmi tv