I found it. This buzzing is from Android keyboard. It's under Languages & input --> Virtual keyboard --> Android keyboard (ASOP) --> Preferences --> Vibrate on keypressIt's working for me.
I checked what happens when I toggle it on and off and at first it didn't stayed off but I toggled it few times(and went back one menu step between toggles) and it started to work normally again. Couldn't replicate it again.
Was trying again and now it does opposite, can't get vibrate back on. : D