- Dec 8, 2010
- Asus Prime X299 Deluxe
- Radeon VII
- Mobile Phone
You don't need a modified kext.
I personally use the Asus 7870, I don't need any boot flags to get the card working.
But, your problem is, that you need to boot with your igfx as first or install the boot loader to the efi partition of your drive, or you should try clover.
With Chameleon or Chimera it is the problem, that hd7xxx cards are not correctly recognized.
clover has no problem with those cards.
That is not entirely true. The problem with Chameleon or Chimera is that the cards vbios memory causes problems and therefore needs to be secondary to avoid the corruption. The way around it is to move the bootloader to the EFI partition as discussed previously on this thread. You can also boot using another medium , most commonly USB. Finally, another way to avoid the corruption is to use clover.