you need to put ext4_x64.efi and OpenLinuxBoot.efi into opencore drivers so opencore recognise linux at boot
install ubuntu on your windows partition not Mac partition if you can
its just a temp thing till we can patch High Sierra 10.13 Azul.kext. i been using patched Sierra Azul.kext in High Sierra for some time no probs of yet
Hi momodding the Azul.kext for frame buffer was changed on High Sierra.been trying for months to get it working Im on same port as you 0306 which is for 7
the only thing that got it to work was to patch the frame buffer on a Sierra Azul.kext and use it on High Sierra every thing worked perfectly for now at least. good luck