I'm having a real problem here, its taken me a while to find out whats going on.
Essentially, if i inject almost any valid ig,platform-id, the screen goes off once it boots. there was the odd occasion where it would boot but there was no acceleration.
it turns out that both AppleIntelFramebufferCapri and AppleIntelSNBGraphics kexts are being loaded,and they are conflictinng. i solved that by trying both changing the MEI device id and i tried removing the SNB kext totally.
the problem seems that the Capri kext causes my screen to blank when a valid platform-id is injected, it doesnt matter which one, i've tried them all. id 4, 6 and 7 seem to just hang totally and it never boots, the rest all exhibit the same problem.
my system is a mini-its all in one, the display is connected via LVDS, there is a VGA output that i dont intend to use.
on one hand, my gut feeling was telling me that it was simply using the wrong output, elsewhere i read that this simply means i'm using the wrong framebuffer.
not sure where to go from here, what does anyone here think?