t3500master Posted September 21, 2015 Share Posted September 21, 2015 Hi Specs: 3 monitor setup (2x 1920x1080, 1x2560x1440). AMD 7950 Sapphire (2x DVI, 1 HDMI, 1 Displayport). OSX Yosemite, Chameleon bootloader 2 monitors plugged into dvi ports, 3rd one running on an active Displayport -> HDMI adapter. All 3 monitors work in windows. The 3rd monitor is recognized by OSX. It shows up in display preferences and I can move my mouse over it, but it is a black screen. If I set the computer to sleep and bring it back, the 3rd monitor works, but I don't want to have to put my computer to sleep right after turning it on. I tried the FB-rotate trick, didn't work. Is there anyone with a similar setup that has any insights into this? Link to comment https://www.insanelymac.com/forum/topic/308141-black-screen-monitor-only-works-after-waking-from-sleep/ Share on other sites More sharing options...
TheRacerMaster Posted September 23, 2015 Share Posted September 23, 2015 You probably need to edit your framebuffer. Link to comment https://www.insanelymac.com/forum/topic/308141-black-screen-monitor-only-works-after-waking-from-sleep/#findComment-2169758 Share on other sites More sharing options...
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