So this is the 2nd logitech keyboard I've tried. Keys like volume up / down and the mute button work. Play/Pause, Stop, Back, Forward don't work. I tried with multiple media players as well, my favorite being Banshee.
One weird thing about this... if I open the sound menu in Cinnamon (I use Mint 17.3) and hit a media key like pause, it works! Why not when the menu is closed?
Any Suggestion Would be appreciate. 

I didn't find right solution on the internet.

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