Bug#665732: closed by " Rémi Denis-Courmont" <remi at remlab.net> (Re: vlc: GUI latency/unresponsiveness to clicks on control options)

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More specifically the volume buttons bring inresponsiveness then, here 
is the behaviour:

- you click to change the volume
- current track continues to play without volume change
- you can try to change a track but it won't
- then after like 8 seconds actions in queue will be taken, like volume 
and track changes

I don't even use pulseaudio nor have it installed, so I hope this is not 
the definitive behaviour, may be due to my setup ..