Ubuntu 15.04 hotkeys fail after startup

Hello,

I am relatively new to Ubuntu and I am experiencing an issue with hotkeys. After booting Ubuntu 15.04, there is about a 50% chance that hotkeys won't work for the entire session. I am talking about custom hotkeys, everything under Keyboard Shortcuts and all system hotkeys, like F4 too. The ones that still work are related to Unity. When I type "setsid compiz --replace" and click on the unity symbol on the Alt+F2 screen, everything is alright again. I am now looking for a more permanent solution. Could the aforementioned script somehow be even more automated, and placed in some start up directory? I already tried to do that with no luck. I get the feeling this whole thing can be permanently fixed in another way. Anyone got a suggestion?

Thanks!

- - , .
.