redratto said:Right now I am running Lion 10.7 with vanilla kexts on ATI 5770 (XFX HD-577X-ZMF3) and ACD 27” connected to MiniDP with full acceleration. Cinebench score of 37.
Anyways, here is what I did. Used vanilla kexts for 10.7. In ATI5000Controller.kext, opened Info.plist and replaced Langur with Vervet. Saved and repaired permissions. That’s it.
The reason acceleration did not work before was that I was missing the ATIRadeonX3000 plugin and bundle files--not sure why they did not copy over.
Regarding the framebuffer discussion from above, turns out the drivers for the Vervet framebuffer, while not mentioned in Info.plist of the ATI5000Controller.kext, are present in the controller file. When you open the controller file in Hexedit you can see references to Vervet. Without a reference to Vervet in ATI5000Controller.kext only the DVI ports will work on the card. By replacing Langur with Vervet, the system activates the MiniDP on the card again.
macspear said:Wow redratto,
all you did was making this small edit and its working just fine now?
Are there no other activation methods apart from graphicsenabler=yes involved?
Sure sounds great!
macspear said:hmm can't get it to work unfortunately.
this is how I edited the Ati5000Controller Kext and my com.apple.boot.plist.
Any ideas ?
justruss said:Yes!
I just tried the method of going back to all original 10.7 ATI kexts-- but changing Langur to Vervet in the ATI5000Controller kext. Boots fine, full acceleration.
Funny thing: Cinebench FPS went from 35.7x w/ 10.6.7 kexts (1.6.26) to 35.5x with the 10.7 kexts.
I don't really care. And it's still about a 10% increase over any results I got in any version of Snow Leopard. But I thought it was interesting anyway, particularly because Cinebench is very consistent for me... for any given setup, I get consistent/identical FPS results down the .01 every run.
In any case, we now have an almost ideal, totally elegant solution to the mini Display Port/5770/Lion issue!
justruss said:justruss said:So each step has been an improvement. And going from 32.32 FPS to 36.26 FPS is an speed boost of ~ 12%. Not too shabby. Of course, it's still far behind Windows 7 Open GL results.