[SOLVED]Gigabyte 6850 Dual Screens GE=Yes with Duckweed

[3tybagig]

Hi

I'm testing a Gigabyte 6850
Runs one monitor great and install was easy with Chimera. Thanks.

But can't get any second monitor to work.

I did not add any additional drivers, just stock 10.6.8 on an Asrock H61M with user DSDT and Sandy Bridge G650.

I read lots of posts but have found nothing leading to a solution.

Am I missing something?

I have tried all the ports on the card but not the Display port because I have no such cables.

Thoughts?

Ty.

 

[3tybagig]

Re: Gigabyte 6850 Dual Screens not working GE=Yes

Update:

I found a DiplayPort/HDMi adapter on the back of a shelf and tried.

Got dual screens but the secondary screen was tinted purple to a severe degree. Weird.

I switched to the new ATY_Init.kext and GE=No (attached)

Now it boots to dual screens full QE/CI and the color is correct on both screens.

I'd love to use GE=Yes if anyone has any suggestions though.

Thanks

Ty.

 

[3tybagig]

Re: Gigabyte 6850 Dual Screens not working GE=Yes

Okay I'm a big Poopycock.

I found Tony's blog post about not needing injection on 5xxx/6xxx cards.

I guess I been out of the loop for a while.

So I removed ATY_init and set GE=No and it boots fine, no injection and both screens working perfectly.

 

[3tybagig]

Re: Gigabyte 6850 Dual Screens not working GE=Yes

I have one last question. And it is a stupid one. Just looking for confirmation.

Does the Gigabyte 5770 Batmobile work the same way?

No injection required and dual screens OOB?

Thanks for patronizing me.

Ty.

 

[Frostcall]

Re: Gigabyte 6850 Dual Screens not working GE=Yes

Interesting, I never thought about trying the Display Port since I don't have a adapter. I guess I'll grab one and see what happens.

 

[3tybagig]

I did a bunch more testing today trying to get the framebuffer to load correctly for dual screens.

My current config is working optimized for dual screens:

output of ioreg | grep ATY

    | |   |   | +-o ATY,Duckweed@0  <class AtiFbStub, id 0x10000038e, registere$
    | |   |   | +-o ATY,Duckweed@1  <class AtiFbStub, id 0x10000038f, registere$
    | |   |   | +-o ATY,Duckweed@2  <class AtiFbStub, id 0x100000390, registere$
    | |   |   | +-o ATY,Duckweed@3  <class AtiFbStub, id 0x100000391, registere$

com.apple.Boot.plist looks like:

	<key>GraphicsEnabler</key>
	<string>Yes</string>
	<key>AtiConfig</key>
	<string>Duckweed</string>

Cabling is
DisplayPort adapter to HDMi to main screen
DVi (The one on top) to secondary monitor via DVi to HDMi cable


Istat shows

Cinebench

Funny thing is all this testing was done on my GA-X58A-UD5 with i7-980X
But when I tested on my little one core G650-SB on shity little Asrock MoBo I got a higher Cinebench score, (29.5) WTF.

edit\
A worthy note:
If I run GE=No then everything boots fine but the generic radeon framebuffer is loaded but I am able to run dual monitors using both DVi ports or DisplayPort and HDMi combo. But with Duckweed enabled I can only run dual monitors on DisplayPort and DVi combo.


Ty

 

[Frostcall]

That is a bit odd. With Chrome running in the background and several tabs open, my 6850 scored a 37.60..

Thanks for the help, I'll try to figure out my settings today to get two monitors working. Not sure what Duckweed is...

 

[3tybagig]

Thanks for the feedback.

Duckweed is the framebuffer for this card. You insert it in com.apple.Boot.plist as

   <key>GraphicsEnabler</key>
   <string>Yes</string>
   <key>AtiConfig</key>
   <string>Duckweed</string>

I reset my bios, changed Graphics to PEG-PCi-16-1 and cleared caches and boosted my Cinbench a bit.

 

[mgldan]

I'd add that you definitely can't use the HDMI port in OS X with GE = Yes. I can only get dual monitors by using an active DisplayPort to DVI adapter.

Good post by the OP!

 

[Deverall]

N00b here,

I just setup my Hackintosh and I cannot get the second monitor to work. I have a Gigabyte GA-Z68MX-UD2H-B3 with a Sapphire Radeon 6850 card. Can anyone alk me through what I need to do to get the second monitor up and running?

Thanks.