HELP! MSI Radeon 6850 not working with Mountain Lion 10.8 through HDMI

[Constantijn]

I desperately need help with my MSI HD Radeon 6850 OC.
Although I found a fix for Lion, it stopped working in Mountain Lion.
It needs to work through HDMI.

PROBLEM:
I can install Mountain Lion by using my onboard graphics in combination with graphicsEnabler=No.
BUT, after installation the screen freezes during the Apple Logo.

I need a custom ATI6000controller.kext for Mountain Lion 10.8

PS: I've added the custom kext file that worked for Lion 10.7. As it might help.

 

[lethanhtung89]

I desperately need help with my MSI HD Radeon 6850 OC.
Although I found a fix for Lion, it stopped working in Mountain Lion.
It needs to work through HDMI.

I need a custom ATI6000controller.kext for Mountain Lion 10.8

PS: I've added the custom kext file that worked for Lion 10.7. As it might help.

same as me..I use Asus 6850..When I used it for 10.7, I edited ATI6000controller.kext to use w HDMI..But I cannot edit it for 10.8.. I have AtiConfig=Duckweed - AtiPorts=4 in file org.chamelion.boot.plist..can anyone edit it for me.. thx u very much..

 

[Constantijn]

Some more info to use.
This was my previous thread: http://www.tonymacx86.com/graphics/44696-solved-msi-hd-radeon-6850-oc-fully-working.html

 

[karacho]

I use the original kext, but I don't use a Framebuffer String in my boot.plist and have removed the npci Flag because stuttering and sometimes KP. Perhaps it helps.

<key>DropSSDT</key>
<string>Yes</string>
<key>EthernetBuiltIn</key>
<string>Yes</string>
<key>GenerateCStates</key>
<string>Yes</string>
<key>GeneratePStates</key>
<string>Yes</string>
<key>UseKernelCache</key>
<string>Yes</string>
<key>GraphicsEnabler</key>
<string>Yes</string>
<key>Kernel</key>
<string>mach_kernel</string>
<key>Kernel Flags</key>
<string>-v darkwake=0</string>
<key>Quiet Boot</key>
<string>Yes</string>

 

[Constantijn]

Right now, I've restored my old Lion installation since I need to use my computer.

If someone has this card working for Mountain Lion, I would like to know how.

 

[lethanhtung89]

I have Asus 6850..Anyone can help me edit kext ATI6000Controller for Mountain Lion.. I only use DVI without HDMI..When I use 10.7.4 I downloaded ATI6000 from a topic here and I can use it for DVI or HDMI..I remember that it used personality was the mix of Duckweed and Lotus..

 

[jazz0420]

Try this...