Can't Boot with Internal Graphics Enabled - Gigabyte Aorus Pro Z390

[ainsleyclark]

Hi there,

I'm trying to boot Catalina with internal graphics enabled but I am faced with an error message (attached).
I'm using opencore, the system boots perfectly with it disabled.
Above 4G Encoding is enabled in the bios.

Does anyone know how to get it working?

EFI Attached.

Spec:
Intel Core i7 9700K 3.6GHz
Aorus Pro Z390
Sapphire RX580 8GB
Corsair CMU16GX4M2C3000C15R Vengeance LED 16 GB
BCM943602CS Combo Bluetooth/Wifi Card

 

[ainsleyclark]

Any ideas anyone? Thanks

 

[ainsleyclark]

Update
Tried to inject device id and framebuffer patches but still no avail.
Disabled Vt-d nothing

 

[sn00per0]

I've got the same board, same video, same CPU. I had to set the iGPU in the BIOS to enabled (not auto), 32MB DVMT Pre-allocated, 128M DVMT Total Gfx Mem and 128MB Aperture size. This is new setup for me, so I'm still working out the kinks, but this allows me to boot with iGFX enabled.

 

[ainsleyclark]

Hi @sn00per0

Thanks for your reply.

Are you using opencore?
It would be great if you could share your EFI as our setups are so similar.
Interestingly it boots in clover fine with the same bios settings.

Thanks again.