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Radeon 7850 broken in 10.10.1 yosemite

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Joined
Apr 16, 2014
Messages
8
Motherboard
GIGABYTE GA-Q87N
CPU
Intel i5-4460
Graphics
Intel HD 4600
Can confirm that AMD 7950 isn't working either under 10.10.1

I receive black screens from HDMI as well as DVI-D on the DGPU. Integrated Graphics (Asrock Z97 with HDMI + DVI-D; Intel i5-4460/HD 4600) is working flawless with full hardware acceleration.

I also noticed that in Mavericks, the 7950 was recognized as "AMD 7xxx" - but in Yosemite it's named "AMD Radeon HD 7950/8950/R9 280" .. maybe driverupdate or so..

Oh and on "GraphicsEnabler=No" it isn't working as well..Black Screens - when I try to switch between IGPU and DGPU during runtime, I receive a full freeze and have to hardreset.

Running 10.10.1 with Clover
 

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Joined
Apr 16, 2014
Messages
8
Motherboard
GIGABYTE GA-Q87N
CPU
Intel i5-4460
Graphics
Intel HD 4600
Found a solution!

Seems like the broken dGPU-Support resulted in bad bootloader configuration of clover. When I rebooted from my OS X USB Flash Drive, both the iGPU and the dGPU are working.

Because I couldn't determine, what exactly was causing this problem, I replaced the bootloader config on my SSD with the one on the Flash Drive.

Hope this helps!
 
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