jamdox Posted February 4, 2018 Share Posted February 4, 2018 I have the above older cards, both work OOB and are supported. I prefer to have the AMD as the primary card and the Nvidia there in case I want to run an application with CUDA. The problem is that the screen will be black on login when plugged in to the AMD card. At that point I can switch the output to the Nvidia and it will work fine. I haven't tested with the AMD in the secondary slot, but it doesn't matter, since I also want to be able to see the boot process taking place, which means having my monitor plugged into the primary card. I'm really at a loss for troubleshooting this, I've tried adding various lilu-based "fixes" to the kext directories on the EFI/Clover part of the EFI partition. Installing Nvidia web drivers didn't help, either. Thanks in advance. Link to comment https://www.insanelymac.com/forum/topic/332314-amd-7970-nvidia-670-black-screen-on-login-with-amd-primary/ Share on other sites More sharing options...
MARZILLO Posted February 4, 2018 Share Posted February 4, 2018 try this http://www.insanelymac.com/forum/topic/305938-fix-fix-for-black-screen-on-amd-7xxx-cards/page-5 post 81 Link to comment https://www.insanelymac.com/forum/topic/332314-amd-7970-nvidia-670-black-screen-on-login-with-amd-primary/#findComment-2584154 Share on other sites More sharing options...
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