I have ran into a weird situation here.
My DELL 7720 SE laptop had some power problem on the motherboard (as told by the service center guys) which made my system unbootable.
They replaced the motherboard.
I brought it home and obviously, tried installing OSX using the Time Machine Backup. It restored correctly.
Used all the same files/ config as earlier but the system couldn't boot up.
It boots in safe mode, but no QE/QC.
When I delete the Intel HD4000 Kexts and SNBGraphics etc kexts, the system boots up, again w/o QE/QC!!!
Now, what in the world has gone wrong??
I have updated the BIOS to the latest A16.
Is the new motherboard different than the earlier one?
Basically, Intel HD4000 is not working.......
I am trying get it work on OS X 10.9.2
I tried latest Chameleon Bootloader with DSDT=Null and tried all IntelCapriFB=1-11 EnableDualLink=Yes/No, GraphicsEnabler=Yes/No SkipNvidiaGfx=Yes..
All except one gave me Black Screen...
IntelCapriFB=4 was the best one as the Intel Graphics was detected correctly with 1024Mb VRAM...but No QE/QC..
The graphics is obviously crappy without QE/QC...
I checked the loaded KEXTS and found that AGPM is not loading.. FramebufferCapri and HD4000 kexts are loading with IntelCapriFB=4....
Also, clover Bootloader is not able to find my Mac volume, yes, i have the HFS related driver in CLover... tried both Vbox and HFSPlus...!!!!!
So using chameleon on the USB as I have windows in UEFI mode with GPT partitioning.
The older DSDT worked flawlessly (thanks to Lejenk)
Somehow the same DSDT has stopped working after the swapping of motherboard.....