The older Settings Application had a 'Detect Displays when Application Loads' and a 'Detect Displays' button. I'm not finding any equivalent option with the new Crimson drivers. The only fast work around I have found (besides just rebooting my PC entirely) is to turn on my addition monitors/TVs and put my PC to sleep. Once I leave sleep mode the additional displays are detected. Would be much more convenient to have a button in the Radeon Settings app to just detect displays.