I´ve had this problem now for 6 months now and its driving me crazy. Every time i boot into windows my monitors just stay black. I got a dual monitor setup.. main with DP and second with HDMI.. they both just are black when booting.. i do see the POST on both at startup. I allways have to cycle win+p keys to get them alive and its annoying. Looked everywhere and cant find a solution. Tried older drivers with no success. My GPU is XFX R9 290X and OS is win10 64bit pro. Any tips? Thanks in advance for help.