https://bugzilla.redhat.com/show_bug.cgi?id=1346811
--- Comment #12 from Rex Dieter rdieter@math.unl.edu --- if you click on the plasma powermanagement/battery applet, it should display all current/active inhibitors.
other examples of where this inhibitor feature can be used: media players: you don't want your computer to go to sleep with playing a video, for example