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Windows 10 Boot Fails in Dual Boot from Clover - if IGPU enabled

Joined
Aug 18, 2011
Messages
310
Motherboard
ASRock Z270M-ITX/ac
CPU
i7-6700K
Graphics
GTX 950 2 GB
Mac
iMac, MacBook Pro, Mac mini
Mobile Phone
iOS
This is for my GA-Z97X-Gaming-7 Hack. It contains a Radeon 580RX Graphics.

If I disable the IGPU in the BIOS , clover boots Windows 10 with no problems.
If I endable the IGPU I get the Windows Boot Failure splash screen.
If I press the F12 key and attempt a direct boot from the Windows Boot Manager disk, it fails to boot - splash screen again.

For several years I have been aware of this problem on this Hack. OSX is running fine with IGPU enabled on 10.14.2. But I can't boot the Windows installation if the IGPU is enabled.

A key piece of information is that this Windows installation was a HD to SSD copy of an older Windows install, and as I shut down that older PC (which also was a dual booting Hack) I convinced Microsoft to give me a new Registration key for the move of this valid old install to new HW.

I can't remember if the older system also forced me to disable the IGPU in the BIOS.

In 2018 I built a newer Hack, on a ASROCK Z270 motherboard, and paid for a new Windows key, as I made that dual boot too. But importantly I do NOT have to disable the IGPU on that Hack. It boots from CLOVER with no problems to either OS.

Does anyone know how I can get this GA-Z97X Hack to dual boot, WITHOUT going through the BIOS step of disabling the IGPU ?

Thanks
 

Going Bald

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Motherboard
GA-X58A-UD7 Rev.1 BIOS F7
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Intel Xeon W3670
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RX580
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Classic Mac
iMac
How much vram are you assigning the igpu? This sometimes makes a difference.
There are several settings in the UEFI/BIOS related to the graphics settings - check your board manual for setup: you may not have it set properly to run Win10 with the igpu. Also check the Win10 settings to see if you disabled igpu when you installed drivers for the GPU and made it the default graphics device.
 
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Joined
Oct 19, 2012
Messages
7
Motherboard
GA-Z97X-UD3H
CPU
i5-4670
Graphics
RX 580
Mac
MacBook Pro
Mobile Phone
iOS
Hi, deactivate the IGPU in Windows Device-Manager. After that you can Boot into Windows with Clover.
 
Joined
Aug 18, 2011
Messages
310
Motherboard
ASRock Z270M-ITX/ac
CPU
i7-6700K
Graphics
GTX 950 2 GB
Mac
iMac, MacBook Pro, Mac mini
Mobile Phone
iOS
How much vram are you assigning the igpu? This sometimes makes a difference.
There are several settings in the UEFI/BIOS related to the graphics settings - check your board manual for setup: you may not have it set properly to run Win10 with the igpu. Also check the Win10 settings to see if you disabled igpu when you installed drivers for the GPU and made it the default graphics device.
I have tried to assign various sizes to the VRAM of IGPU, 64M, 256M, 334M. None of those choices work.

Last weekend I did a complete fresh install of Window 10, where I disconnected the OSX drives and had only a Windows SSD attached. The re-install went normally. I was able to boot from the SSD directly, meaning no Clover intermediary boot loader. I re-attached the OSX / Clover SSD, booted to Clover with IGPU enabled. Fails. Exactly as before.

I then attempted to boot into 10.14.2. It fails the Clover boot - just loads the splash screen and sits there. No graphics. This is without me changing the EFI partition on the UEFI OSX SSD. I tried it with IGPU enabled and with IGPU disabled, my OSX boot is gone. I can boot into the Recovery Mode. Another nightmare. I can't boot to Safe Mode. I can get to Single mode but it won't exit into the GUI. No changes were done to the config.plist of Clover. It just stopped. No new drivers, nothing. I will attempt to boot from a Clover USB stick later today.


Hi, deactivate the IGPU in Windows Device-Manager. After that you can Boot into Windows with Clover.
I think you miss the point, but thanks for the comment. My goal, much thwarted, is to boot to OSX and to Windows 10 with IGPU enabled in the BIOS.

Anyway I'm back in the world of a mess yet again.
 

Going Bald

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RX580
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Classic Mac
iMac
@tecemac
Can you install Mac OS with iGPU enabled and boot reliably?
When you install Win10 with iGPU enabled it boots OK, yes? Then when you boot with Clover and select Win10 to boot it will not work? If true, check Clover config.plist graphics settings.
 
Joined
Aug 18, 2011
Messages
310
Motherboard
ASRock Z270M-ITX/ac
CPU
i7-6700K
Graphics
GTX 950 2 GB
Mac
iMac, MacBook Pro, Mac mini
Mobile Phone
iOS
Can you install Mac OS with iGPU enabled and boot reliably?
Not sure what you're asking here. I used to have a fully functional 10.14.2 OSX running on this GA-Z97X motherboard system. So why are you asking me to install the Mac OS again? Something changed - yes I don't know what - but trying to reinstall Windows 10 last weekend messed up my OSX boot. Yes it is a graphics issue of some kind. Are you suggesting that I go into recovery mode and run "install mojave" again?

When you install Win10 with iGPU enabled it boots OK, yes? Then when you boot with Clover and select Win10 to boot it will not work? If true, check Clover config.plist graphics settings.

Yes I have IGPU enabled in the Windows 10 SSD. If I boot directly from that SSD, i.e. F-12 select boot disc, then Windows 10 boots just fine. The device driver shows the G4600 IGPU and the 580RX as display controllers.

Today I took my saved off copy of the EFI partition ( which used to work ) and put it on a USB stick, in the USB EFI partition. I F-12 selected that USB and started its Clover, and it FAILS the same way as the Clover on the SSD. No surprise I guess. I can boot to single user. But once I exit single user the console spews some Clover message, which I can't read it goes by so fast, and I can't freeze the console. A Ctrl-S or Ctrl-Q does not flow control the console messages. Is there another way? All I can glock from the spewing messages is something about 'corruption'.

The Clover version is something like 4580 or something about 8+ months old. Is it possible the Clover version is out of date/whack? It was reliably working. Maybe I updated to 10.14.2 some months messed up the boot, and then rebooted to Windows 10 (with the IGPU disabled) but never really tested booting back to 10.14.2 ?

thanks for the reply.
 
Joined
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Messages
310
Motherboard
ASRock Z270M-ITX/ac
CPU
i7-6700K
Graphics
GTX 950 2 GB
Mac
iMac, MacBook Pro, Mac mini
Mobile Phone
iOS
The latest.

I updated the USB installer to Clover v4862 using the tonyMac UEFI installer. I then copied the SMBIOS portion of the older original config.plist to the new installed config.plist.

I booted. Same failure. Gets to where, I believe, it is about to init the Graphics and just doesn't. The Apple splash screen fills the progress bar and the system just sits there.

In a near panic I decided to boot to Recovery and run Install MacOS again. That continued for 30 minutes and after a couple of reboots it stopped and complained about not being able to "finish a copy".

Now I have nothing. No OSX.

My only guess is that the SSD has become corrupted?

Ideas?
 
Joined
Aug 18, 2011
Messages
310
Motherboard
ASRock Z270M-ITX/ac
CPU
i7-6700K
Graphics
GTX 950 2 GB
Mac
iMac, MacBook Pro, Mac mini
Mobile Phone
iOS
And even later.

I brought out my disk CarbonCopy clone of the SSD. I inserted the USB flash drive, booted it using Clover v4862, and selected the HDD image to boot from.

It booted. (No I have not tried the Windows 10 boot from that USB drive)

The Samsung PRO SSD is bad. This is the second time in a year that a Samsung SSD has gone bad on me. This time it appears that just sitting in the machine running Windows 10 - therefore not accessing the Samsung SSD - the drive went south. Piece of crap. Are we allowed to say that?
 
Joined
Oct 19, 2012
Messages
7
Motherboard
GA-Z97X-UD3H
CPU
i5-4670
Graphics
RX 580
Mac
MacBook Pro
Mobile Phone
iOS
I think you miss the point, but thanks for the comment. My goal, much thwarted, is to boot to OSX and to Windows 10 with IGPU enabled in the BIOS.
yes you let the igpu enabled in the bios, but in windows you deactivate the igpu in the device-manager and just use the rx.
 
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