I have a R9 390 and just updated on 18.1.1. When a game is about to start, for example Rainbow Six/Rocket League, it freezes right when it enters fullscreen. If i disconnect my second screen (extended), all works fine. Before the update i had no issues like that. Thanks in advance.
Maybe important: If i start the game without the extended screen connected, and connect it while ingame, all works fine.