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Sapphire HD 6870 HDMI Black screen in 10.6.8

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Joined
Jun 26, 2011
Messages
17
Motherboard
Gigabyte Z490 Vision D
CPU
i7-10700K
Graphics
HD 630
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
Hi all,

First off, let me say a big thanks to all that have contributed to this wonderful site!

First time poster, long time lurker :)

My system is 99% there, the only problem I seem to have is that I get a black screen if using the hdmi port of my graphics card when I boot into 10.6.8. (Works fine on the Win 7 side). I can see everything if i boot with -v up till the point just before the desktop and then it all goes black.

If I have both the HDMI and the DVI ports connected I get the Snow leopard background on the DVI port (must be showing as a second display) and a black screen on the HDMI side.

Im using the correct DSDT for my motherboard and the graphics card is showing correctly in the System profiler.

Any help / ideas appreciated :)


System spec: core i7 2600K @ 4.2Ghz, 8GB Corsair XMS3 Ram @ 1600Mhz,
Gigabyte p67a-ud3-b3 Version 1.1 BIOS F4, Sapphire HD 6870 1GB
 
I have the same problem.

Do you fixit? How?
 
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