When I run it, it simply shows the national keysets, I don't think that that's right. I will post a screenshot which shows that indicator what I want to get. It's on my PC where it works correctly (when I change the volume with special keys on my Genius Comfy Keyboard).
On my laptop the volume is increasing or decreasing (physically) but system shows only full volume and no indicator, just like I don't press anything. On ubuntu it worked corretly like on my PC, so it can't be nothing serious.