screen is detected in macOS Sequoia 15.2 on my iGPU but turns black after boot sequence

[Roelof Muylaert]

My setup is a Asus ROG Maximus XIII Hero as my motherboard 

i9-10900K CPU

RX 6900-XT from Sapphire Toxic Limited Edition 

32GB corsair Vengeance PRO for memory

everything seems to work except for my iGPU that detects the screen but doesn't output video on it . Does somebody knows how to get it to work ?

I use Open Core 1.0.3 all kext are up to date.

boot-arg are e1000=0 revpatch=sbvmm -nvmefaspm igfxonln=1 igfxonlnfbs=0x010203 igfxagdc=0 igfxgl=1 agdpmod=pikera -cdfon

 

 

iMac 20,2.zip

Edited December 27, 2024 by Roelof Muylaert
more info

[Max.1974]

Hi @Roelof Muylaert, are you try using iGPU with your eGpu RX 6900-XT ? If you have this strong eGPU its better you not try use both, because you will need change after every boot, options primary video on BIOS and change your boot-args at same time. 

Just use RX 6900-XT its more reasonable that try both, because is to much work to make this. Remove all your args about iGpu and use only agdpmod=pikera. 

You need put your hardware signature too. 

 

Remove this args:  igfxonln=1 igfxonlnfbs=0x010203 igfxagdc=0 igfxgl=1 -cdfon

Edited December 27, 2024 by Max.1974

[Roelof Muylaert]

I try to use them both at the same time I think it must be possible somehow but the info on how to do this is lacking on the net .

@Max.1974 where do I need to put my hardware signature ?

Edited December 27, 2024 by Roelof Muylaert
answer to Max.1974

[verdazil]

@Roelof Muylaert, the traditional use case for CPUs with supported integrated graphics is as follows:

- all monitors are connected to a discrete graphics card

- the integrated graphics are set to an empty frame and are used for video encoding/decoding and interface rendering.

This is the option with the most rational use of resources.

[LockDown]

you need to create device>properties for your igpu

[miliuco]

@Roelof Muylaert

Signature: add it in Account >> Profile. 
 

Intel UHD 630: follow this instructions. 2 ways. Headless mode to have the iGPU not driving a display. The other way to have the iGPU as single GPU. Set the headless mode and connect all displays to the AMD. 
agdpmod=pikera is needed. 
cdfon not needed. 
 

Edited December 27, 2024 by miliuco

[Roelof Muylaert]

How do I set the iGPU to an empty frame so I can use it for video encoding/decoding and interface rendering.

because now the iGPU doesn't show any activity only the dGPU 

[verdazil]

35 minutes ago, Roelof Muylaert said:

How do I set the iGPU to an empty frame so I can use it for video encoding/decoding and interface rendering.

Look at the @miliuco link.

[verdazil]

@miliuco, i9-10900K is Comet Lake CPU. Not Coffee Lake R.

I recommend other settings:

 

Edited December 27, 2024 by verdazil

[miliuco]

@verdazil

Yes, it's Comet Lake but integrated graphics card is same build. Intel UHD 630. I guess both share properties but he can try both settings.

Anyway, @Roelof Muylaert it's mandatory to set the AMD as first boot graphics device in BIOS. 

[Max.1974]

@eSaF I actually wanted to make life easier for him, because few people here, like you, use this method, which for me, without wanting to offend, would only be a cosmetic parfum. But anyway, if they can do it, I believe it must be of benefit to him. If you have time and patience, but the best option today to avoid this, and use it in a functional way, would be to buy an ARM from Apple.

Edited December 28, 2024 by Max.1974

[miliuco]

@Roelof Muylaert

Upload here the config.plist you are using now.

 

Edited December 27, 2024 by miliuco

[Roelof Muylaert]

don't mind the mess in it please still a work in progress my serials are deleted out of the config for safety reasons.

config.plist

Edited December 28, 2024 by Roelof Muylaert

[verdazil]

@Roelof Muylaert, at present, serial numbers have nothing to do with security!

[Roelof Muylaert]

yeah ok maybe then its for my personal reasons hi.

[miliuco]

@Roelof Muylaert

I suggest these changes:

 

1.- BIOS
   iGPU enabled (if not already)
   PCI-express as boot graphic device

2.- iGPU does not drive display (all displays are attached to AMD)

3.- iGPU DeviceProperties (replace what you have now with this)
This settings

 

Or these other settings

 

 

4.- AMD DeviceProperties (replace what you have now with this)

 

5.- boot args

 

 

Try and comment if it fixes the issue.
If it doesn't, grab gfxutil, run it and copy paste the output.

 

Edited December 28, 2024 by miliuco
Typo

[Roelof Muylaert]

ok I try headless but then I first need to buy a new cable from dp to hdmi or dvi or something in linux it worked with the 2 attached to each a hdmi port driven by different GPU's driving them and in windows also that's why I tried it too in macOS  

[miliuco]

@Roelof Muylaert

Why do you need to buy a new cable? RX 6900 has both DisplayPort and HDMI. What connector has your display? DVI should be avoided on modern versions of macOS.

[Roelof Muylaert]

I know but it only has 1 HDMI and 3 DisplayPorts and the screen has DVI or HDMI or VGA and the intel Mobo has 1 HDMI and 2 USB-C thunderbolt ports

 

Sapphire RX 6900-XT has 4 ports 1 ==> HDMI

                                                  and 3 ==>DP

 

iGPU has on the MotherBoard 3 ports 1 ==> HDMI

                                                        and 2 ==> USB-c type thunderbolt connections

 

Edited December 29, 2024 by Roelof Muylaert
info added

[miliuco]

@Roelof Muylaert

Okay. The preferred conector in the display is HDMI. Best HDMI (AMD) to HDMI (display). DisplayPort (AMD) to HDMI (display) is also good.

[Roelof Muylaert]

Then I need to buy first a new cable from DP ==> HDMI Display for the screen because I have only HDMI to HDMI .

[miliuco]

5 hours ago, Roelof Muylaert said:

Then I need to buy first a new cable from DP ==> HDMI Display for the screen because I have only HDMI to HDMI .

Review what I wrote:

"Best HDMI (AMD) to HDMI (display). DisplayPort (AMD) to HDMI (display) is also good."

Did you already try HDMI to HDMI?

[Roelof Muylaert]

yes the HDMI is in use for my TV screen