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Intel HD4000 QE/QC weird issue

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Hey guys!


I have been struggling with this weird issue since last 15-20 days..!


Now I think I have narrowed down the error..


My system:


Dell Inspiron 7720 Laptop

Intel 3rd Gen Core i7 3630QM

Intel HM77 7 series chipset

Intel HD4000 + nVidia GT650M DDR5 2 GB optimus (Never works, I know) 

Using Clover UEFI Bootloader on UEFI system

I have a DSDT for my laptop. But have tried with and without it too.


What happens:

The Intel HD4000 works with QE/QC for a couple of times after fresh install. Then suddenly it stops working, although it is detected as usual. AGPM Capri and HD4000 kexts are loaded still I get no QE/QC... AGPM says "Unknown Platform"... I used a LegacyAGPM.kext to get around with that.
Now when the QE/QC is broken, I reboot the computer and in Clover deselect "GeneratePStates" and "GenerateCStates".... QE/QC is back!!! Again after couple of reboots, it is broken!!!
Now again i select "GeneratePStates" and "GenerateCStates", QE/QC starts working for few reboots!
What is my problem???
Please help!!

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about agpm, use the original and just replace gfx0 for igpu in the dsdt.

Hmm... The problem is that I use MacBookPro9,1 SMBIOS which is closest to my laptop's configuration.. And AGPM kext doesn't have an entry for MAacBookPro9,1....

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it doesnt matter. replace on dsdt gfx0 for igpu.


Hey! It doesn't make any difference!!! :(

Thank u for the suggestion anyways!!!


What the hell is wrong!!! :(

QE QC Works for a couple of times with GeneratePstates and GenerateCstates then stops working.... then if I disable GeneratePstates and GenerateCstates, starts working again!

then stops again... repeat the method by enabling GeneratePstates and GenerateCstates and it starts working for a couple of times... then again disable them both....

This cycle!!!!!


Any clues ????????

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No clues anyone??
Nothing at all??

I'm still facing this issue even after 10.10.3 update...


Doesn't anyone have any clue about this issue?? :(  :(

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