Spanky Deluxe

6950 might be troublesome - 69xx models have always been troublesome. I use a 6870 and it works fine in DP4. It required a bit of work due to the drivers still being a bit buggy but it worked without a hitch in Lion and should work without a hitch in retail Mountain Lion.

For mine(same chipset), I had to use IONetworking from DP3, DP4 version with plugin would not work

Is there any chance you can upload the DP3 IONetworking version?

Have you tried to install the driver from Realtek site?
Here's the link: CLICK HERE!

Scroll down where you see "Others", so download "MacOS 10.7 on Intel-based Mac computer" Package. Then, download it.

Bye,
-giofrida

RTL81xx.kext requires a vanilla IONetworkingFamily.kext.

If you have any non-default plugins contained within IONetworkingFamily it will not work!

Add
EthernetBuiltIn=yes to your org.chameleon.boot.plist

I've tried both of those to no avail. Luckily I had an Apple USB->Ethernet adapter kicking about so I'm using that for now but 100 MBps doesn't go too far when you've got a 70 Mbps broadband connection and the computer in question is a Plex server!

Solved!!

Soo, I dug around in the Ati6000Controller.kext, both on the install image and the actual installed OS. This snippet is from the plist:

   <key>IOPCIMatch</key>
   <string></string>

Notice anything missing?!
Silly Apple, why you no hear of buddy checks!

I then simply copied and pasted the device ID's from DP3 and viola!!! Success!!

   <key>IOPCIMatch</key>
   <string>0x67681002 0x67701002 0x67791002 0x67601002 0x67611002 0x67501002 0x67581002 0x67591002 0x67401002 0x67411002 0x67451002 0x67381002 0x67391002 0x67201002 0x67221002 0x67181002 0x67191002 0x68401002</string>

To get full QE/CI with a Radeon 6000HD, simply add the missing info into the Ati6000Controller.kext info.plist, repair permissions, add GraphicsEnabler=y to boot.plist and you are good to restart.

Note: If you want to add the device ID's to the installer's Ati6000Controller.kext, add them after you restored the image to a USB drive (or HD if that's the way you choose to do it). However, simply booting from the installer with GraphicsEnabler=n is the easiest way to go about it. Happy Hack'n!

Boom! Good find! Strangely though, my problem turned out to be because of Ati6000Controller.kext but different to yours. I noticed that my Ati6000Controller.kext was basically empty - no plists. I guessed this must have been because I deleted it off the original install usb to get it to install. I copied over the file that I deleted though and noticed that it *did* have the devids added already.

I now have full resolution and QE/CI across all three of my displays, whoop whoop! Well two of my displays that is, the one that is connected via VGA isn't using it's full resolution and clicking 'scaled' instead of 'best for display' in System Preferences crashes System Preferences.

I've got 10.7 installed now by deleting ati6000controller.kext and using GraphicsEnabler=no.

However, I still have to boot with GraphicsEnabler=no and I can't set resolution or use QE/CI.

If I set GraphicsEnabler=yes then it just sits with the Apple logo and the spinning loading symbol forever.