[HELP] External display doesn't work through a USB-C to DP adapter, HP Pavilion 15-cb0xxx, OpenCore 0.5.9, Catalina 10.15.5

[pineapple]

Recently I started to try Hackintosh. I installed Catalina 10.15.4 booted by Clover on my laptop, then change the boot loader to OpenCore 0.5.9, and updated the system to 15.5.5 through the App Store.

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I bought a USB-C to DP adapter and tested it on Windows 10. It worked well and the display is connected to Intel HD 630. But it doesn't work on Catalina.

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I've tried to set ig-platform-id to 591B0000, 59160000, 591C0005, but all failed with black screen. If ig-platform-id is assigned 59160000 or 591C0005, the system will reboot automatically when I plug/unplug the adapter. While with 591B0000, It has no response.

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Besides the internal display, there is no other under the connectors of IGPU in IORegistryExplorer. I've tried to enable all the connectors, but it doesn't make any sense.

I've tried many solutions to similar problems proposed in this forum, but none of them works for me. Could anyone help me?

System Info:
laptop: HP Pavilion 15-cb0xxx
CPU: i5-7300HQ
GPU: HD 630 + GTX-1050
OS: Catalina 10.15.5
Bootloader: OpenCore 0.5.9

 

[zappy39]

I get the same with HDMI connection it only started happening with Catalina 10.15.5 the same with OpenCore or clover

 

[siachori]

I use Thunderbolt 2 port for external display

 

[pineapple]

I get the same with HDMI connection it only started happening with Catalina 10.15.5 the same with OpenCore or clover

Thank you telling me that. I don't know it's a new problem, cause I didn't test it on previous versions of Catalina.

 

[pineapple]

I use Thunderbolt 2 port for external display

I don't have one. But, how do you get it to work?

 

[zappy39]

I use Thunderbolt 2 port for external display

yes my display will work on thunderbolt but not on HDMI

 

[zappy39]

I used the AppleIntelCFLGraphicsFramebuffer.kext from 10.15.4 and the HDMI is working again

 

[pineapple]

I used the AppleIntelCFLGraphicsFramebuffer.kext from 10.15.4 and the HDMI is working again

I replaced the AppleIntelKBLGraphicsFramebuffer.kext with previous version, but it still didn't work.

The IORegistry shows there is no other display recognized.

I use 591C0005 for ig-platform-id, but the value of "AAPL,DisplayPipe" isn't 9 which is listed in whatevergreen's manual:
[1] busId: 0x05, pipe: 9, type: 0x00000400, flags: 0x000003C7 - ConnectorDP
I don't know whether it is a problem or they are not the same property.

 

[d8833051]

Awesome! It works for my hackintosh as well.

I used the AppleIntelCFLGraphicsFramebuffer.kext from 10.15.4 and the HDMI is working again

 

[zappy39]

I replaced the AppleIntelKBLGraphicsFramebuffer.kext with previous version, but it still didn't work.

The IORegistry shows there is no other display recognized.

View attachment 475560
I use 591C0005 for ig-platform-id, but the value of "AAPL,DisplayPipe" isn't 9 which is listed in whatevergreen's manual:
[1] busId: 0x05, pipe: 9, type: 0x00000400, flags: 0x000003C7 - ConnectorDP
I don't know whether it is a problem or they are not the same property.

I did have same prob with busId 0x05 on connection 1 and changed it to busId 0x01 and boom HDMI back