Hello! I've a problem with my MSI R9 390 Gaming 8G. I always get a black screen when Yosemite is loading. I've tried all possible methods (FakeID, InjectATI, modifying kexts) with no results. I can only boot in safe mode. Here the card is recognized as "AMD Radeon R9 290 8192 MB" but i don't get the full resolution (2048x1152 instead of 2560x1440). Please help me!
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