For some odd reason, when I use my FN Volume control keys on my laptop, Ubuntu duplicates the input infinitely until I interrupt it by putting a window in full screen. I'm not sure why it's doing this and searching the internet has found nothing aside form similar questions with no answer. This happens with My mute, Volume Up and Volume Down. If I press it once, Ubuntu repeats it infinitely with the OSD flickering. An answer would be awesome as I can't use those keys at the moment. If more info is needed, just ask and I'll see what I can do.
Samsung Notebook, Model NP355E7C-A01US
Running Ubuntu 14.04 LTS 64bit