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Black Screen Issue on Lion with HD6870

powercolor radeon hd6870 black screen freeze

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9 replies to this topic

#1
cmantsch

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Hi everybody,

I build a Sandy Bridge hackintosh some month ago with components listed at tonymacx86 and everything worked nicely like a real mac.
I used the onChip Intel HD3000 Graphics so far.
Now I upgraded to a PowerColor Radeon HD 6870 1GB.
System boots well, playing games works also without any problems.

But when I surf the web, I get a black screen after about 10 minutes and I have to reset the Hackintosh to reboot.
I tried several AtiConfig Framebuffers, but nothing solves the problem.

As I saw that some users got this card working OOB, I dunno what I'm doing wrong.

I also installed Windows, no issues there.


Does anybody have an idea what causes this problem?

Thanks in advance!

EDIT:

System specs:
CPU: i5 2500K
Mem: 8GB DDR3-1600
Board: Gigabyte Z68X-UD3H-B3
Graphics: Powercolor Radeon HD 6870 1GB
System: Lion 10.7.4

#2
buoo

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Did you test the other DVI connector? :o

#3
cmantsch

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Hi, yes I tested both DVI and the HDMI Connectors, same problem on every port.
I didnt test the two Mini-DP Connectors as I dont have such a display or adapter.

EDIT: Just tried to reinstall Lion, Error still occurs, now I have a light grey screen with vertical lines

#4
buoo

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Vendor, Device ID and Revision ID of your 6870?

#5
cmantsch

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Vendor: ATI (0x1002)
Device ID: 0x6738
Revision: 0x0000

#6
buoo

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My xfx6870 has the same values. I don't know.

#7
cmantsch

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mhh, I think I'll return it to seller, maybe it's defective on some point.

thanks!

#8
@ddi

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I had the same problem with my 5870 posted in here some 3 months ago. I could not rely on either the 2 DVI nor the HDMI so bought a Mini-DP and tried it and it worked :)
Now why we are getting black screens I really don't have a clue tried to solve for almost a year and got it fixed with the Mini-DP cable. It may not be your case though, but from what you are saying is very similar to the problem I used to have.

#9
fredouille

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try to boot with npci=0x2000 and PCIRootUID=1 ( or PCIRootUID=0)

#10
4everAnoob

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npci=0x3000 PciRoot=1





Also tagged with one or more of these keywords: powercolor, radeon, hd6870, black screen, freeze


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