UHD620 black screen (eDP)

[Njut]

Hi,
I managed to install MacOS Catalina on an Asus: (OpenCore)

• ASUS UX490UAR
• Intel Core I7-8550U (Kabylake Refresh)
• Intel UHD 620
• 3x USB-C Thunderbolt
• 1x Jack

But I can't get the internal screen to work, it stays black.
When I connect an external HDMI display to USB-C, it works. (But no picture on the internal screen)
When I use an invalid AAPL, ig-platform-id (12345678), the internal screen works, but without graphics acceleration.

I followed the instructions in the WhateverGreen manual and Dortania Guide:

The graphics acceleration works with these values:

AAPL, ig-platform-id: 0000C087
device-id: 16590000

But
The internal screen is black, but I can control the brightness. The cursor is visible on the external monitor.
Through manipulation, I can see the light vary on the internal screen, but it stays black and nothing is displayed.
Here are some screenshots I took of the external monitor:


My internal display is connected to eDP (Not LVDS), maybe that's where the problem comes from?
I also read a lot about EDID injection ...
I am also including a copy of my EFI file.

I hope you can help me

 

[Feartech]

Hi,
I managed to install MacOS Catalina on an Asus: (OpenCore)

• ASUS UX490UAR
• Intel Core I7-8550U (Kabylake Refresh)
• Intel UHD 620
• 3x USB-C Thunderbolt
• 1x Jack

But I can't get the internal screen to work, it stays black.
When I connect an external HDMI display to USB-C, it works. (But no picture on the internal screen)
When I use an invalid AAPL, ig-platform-id (12345678), the internal screen works, but without graphics acceleration.

I followed the instructions in the WhateverGreen manual and Dortania Guide:

View attachment 514362

View attachment 514361

The graphics acceleration works with these values:

AAPL, ig-platform-id: 0000C087
device-id: 16590000

But
The internal screen is black, but I can control the brightness. The cursor is visible on the external monitor.
Through manipulation, I can see the light vary on the internal screen, but it stays black and nothing is displayed.
Here are some screenshots I took of the external monitor:
View attachment 514365View attachment 514366View attachment 514367View attachment 514368

My internal display is connected to eDP (Not LVDS), maybe that's where the problem comes from?
I also read a lot about EDID injection ...
I am also including a copy of my EFI file.

I hope you can help me

have you tried:
AAPL,ig-platform-id -> 00001B59 ?

[Guide] Booting The USB Installer Using OpenCore

A guide in setting up your USB installer using OpenCore. You must have either a built-in ethernet or compatible Broadcom Wifi in your laptop for this guide to work. Built-in Intel Wifi can also work if set correctly...

www.tonymacx86.com

 

[Njut]

I jut tried :

AAPL, ig-platform-id: 00001B59 (without device-id)

Internal screen work but no graphic acceleration

AAPL, ig-platform-id: 00001B59
device-id: 16590000

Internal screen black, when I tried to connect external monitor the laptop reboot.

 

[Mrgeque]

I jut tried :


Internal screen work but no graphic acceleration


Internal screen black, when I tried to connect external monitor the laptop reboot.

what resolution are you trying to achieve on your internal screen?
also, your device properties section of you config.plist is missing a bunch of essential entries. although we have different laptops, we have same architecture. look at attached pic

 

[Njut]

Thank you for your answer @Mrgeque,
My internal screen have a 1080p resolution.

I just tried with your values :
Unfortunately my internal screen stay black after GPU initialization.
With an external monitor graphic acceleration work, but now with 2048MB.
About this Mac say : Intel UHD Graphics 630 2048MB

 

[Mrgeque]

Thank you for your answer @Mrgeque,
My internal screen have a 1080p resolution.

I just tried with your values :
Unfortunately my internal screen stay black after GPU initialization.
With an external monitor graphic acceleration work, but now with 2048MB.
About this Mac say : Intel UHD Graphics 630 2048MB

if you see 2048mb and uhd630 you didn't put the values in the pic. you also need to add -igfxmpc and igfxonln=1 to boot args

 

[Njut]

@Mrgeque, I made a mistake, i got the configuration file from your guide ... (I thought it was the same)
Can you share the file you are showing with me ? On the screenshot not everything is visible