I've managed to setup HD4000 with DSDT Editing using ig-platform-id: 0166000A on a GA Z77 DS3H motherboard with i5 3570k. (DSDT fixes + patched AppleHDA)
I have full acceleration and HDMI audio using HDMI output to my Sony TV.
The problem is that it boots fine with 1920x1080p BUT if i try to change resolution to something lower than that everything gets messed up.
The only way to have correct resolution change is to put computer to sleep and after wake everything is OK i can then change resolution to anything i want ,after reboot the problem appears again.
I also tried with DVI to HDMI adaptor but same issue.
Tried with latest chameleon from http://chameleon.osx86.hu Chameleon-2.1-r2069.pkg.zip and latest Chimera.
Bios settings have been checked and Graphics Enabler in boot loader is disabled.(Also tried with out any dsdt and Graphics Enabler = True in Chimera but same results)
Tried also MacPro3,1,MacMini5,1 and iMac12,2 if i remember correct.
Any help will be appreciated.
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