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Solved > Gigabyte Vega64 doesn't work if booted from, but does work if booted from iGPU then swap to it

Joined
Jun 21, 2016
Messages
12
Motherboard
MSI Z87-GD65
CPU
Intel i7-4790
Graphics
HD7850 Sapphire
Hi all,

I'm building on a Gigabyte Z370 DS3H motherboard with an Intel CORE I5-9600K, 16GB RAM and a Samsung 970 m.2 nvme drive. I built using the IGFX (onboard iGPU) and have was able to install and login. I installed Mojave then installed clover to the disk and was able to boot and login, and ethernet worked after changing a kext.

I've now installed my GPU - a Gigabyte Vega 64. If I change the bios to boot from the PCI card, it starts to boot, the Apple log appears, the screen goes blank, then I get a black screen with an mouse cursor on it. The mouse cursor can move around 1/4 of the screen in the centre before disappearing out of frame.

If I change the bios to boot from the IGFX and connect an HDMI cable to the monitor, the machine boots and I can login to macOs. I can then switch to the Displayport input on the screen, and the Vega GPU is active and driving the display. macOS sees this as 2 monitors with different inputs on the screen.

I've also tried disabling the iGPU in the bios as well as just selecting to boot from the PCI device.

My config.plist is at https://pastebin.com/9bcP9LPA

I did try adding the black screen patch via Clover Configurator, but that didn't change anything, so I removed it.

I've updated to the latest firmware on the motherboard and the GPU.

I have the following kexts installed following the vanilla guide in the 'Other' folder. These were built with Lilu and Friends yesterday
  • AppleALC.kext (AppleALC-1.4.3-2019-10-18 13.36.55)
  • Lilu.kext (Lilu-1.3.9-2019-10-18 13.36.59)
  • RealtekRTL8111.kext (RealtekRTL8111-2.3.0d7-2019-10-18 13.37.12)
  • VirtualSMC.kext (VirtualSMC (All Tools)-1.0.8-2019-10-18 13.37.30)
  • USBInjectAll.kext (USBInjectAll-0.7.1-2019-10-18 13.37.17)
  • XHCI-unsupported.kext (USBInjectAll-0.7.1-2019-10-18 13.37.17)
  • WhateverGreen.kext
  • XHCI-unsupported.kext
Any pointers in getting past would be greatly appreciated!
 
Last edited:
Joined
Jun 21, 2016
Messages
12
Motherboard
MSI Z87-GD65
CPU
Intel i7-4790
Graphics
HD7850 Sapphire
So, a clean re-install with the GPU in, instead of installing on the iGPU and switching seems to have resolved it. I kept the exact same plist and usb installer, all I did was make the bios change to boot from PCI before starting the install, and disabled the iGPU in the bios.

I have no idea why that worked, because no kexts have changed and the config.plist didn't change, but hey, all's well that ends .... wellish :D
 
Joined
Oct 20, 2019
Messages
6
Motherboard
Gigabyte Z390 Designare
CPU
i9-9900K
Graphics
RX 5700 XT
Hi, I'm building a similar system with Gigabyte z390 designare motherboard , core i9 9900k and Gigabyte Rx Vega 64 ( as it's the only model available in my location ). How is your Vega 64 working so far ? in FCPX and Adobe programs ?
Thanks a lot !
 
Joined
Jun 21, 2016
Messages
12
Motherboard
MSI Z87-GD65
CPU
Intel i7-4790
Graphics
HD7850 Sapphire
Hi, I'm building a similar system with Gigabyte z390 designare motherboard , core i9 9900k and Gigabyte Rx Vega 64 ( as it's the only model available in my location ). How is your Vega 64 working so far ? in FCPX and Adobe programs ?
Thanks a lot !
I've not got any apps running yet - still need to uninstall Adobe Creative cloud from my previous machine. Hoping to do that tonight and might try lightroom if I get time.
 
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