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HD6870 shows BootScreen over HDMI, but gets black when system booted

S

Spacedust

macrumors 6502a
Original poster
May 24, 2009
999
160
I'm testing flashed Sapphire HD6870 (standard version) with Apple HDMI to DVI adapter connected to Apple Cinema Display 23".

It shows BootScreen in proper resolution (1900x1200) then after booting the screen goes blank. Why ?

If connected to DVI port it's all working fine.
 
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