Dark flashing screen after displaysleep or sleep - Catalina - Opencore

[sebadier]

Hello everybody,

I finally managed to get most of my T540p Hackintosh working.

My main problem is though: When the display get to sleep, it won't turn back on. I would only get a black screen with random white flashes.
Any experience or solution for that?

Also I had to choose platform-id 0x0D220003 which is an iMac firmware to get my system to boot with graphics at all. When I chose a Mac Book Pro firmware (0x0D260007), my system turns off the screen at the end of booting process. Everything else is working though.

Hope some of you can give me a hint.

 

[sebadier]

The Displayport is waking up properly by the way. So an external screen would work.