I set my screen to dim after 2 minutes idling on battery in XFCE power settings. If I lock and click new login, and log in as another user, the screen will dim after 2 minutes even though that second user is active. Is there some setting or workaround for this? It feels like a bug, but I have no idea what program or combination of programs would be responsible … (I don't know if this affects Unity users or not.)