sdmkx

Disabling the Gatekeeper did not help the result is the same

boot with 2 DP - black screen, resetting... disconnect 1 DP, booting with 1 DP - black screen second try 1DP, booting - black screen boot from USB - the screen appears.. something still wrong 😞

Thank you, fabiosun, for your fast reply! Disable whatevergreen, it boots much faster, and disable applealcu - the result is good, the sound is on will try to boot with 2 DP ports

X870E Taichi Lite uses Realtek ALC4082, everything I find about it is like USB audio, somewhere I read that it needs to use AppleALCU but will try without also...

EFI.zip I think yes, could you check my efi Without whatevergreen never tried, will try..

I made a build based on an x870 Taichi Lite, AMD 9950X3D, 6600xt, NVMe, and 64 GB RAM, and use your @fabiosun efi. Of course, I made some changes for my devices, but still, something is wrong with the video. After booting, everything disappeared, a black screen, and after about a minute, the screen appeared. Booting just with the middle DP, if connected to 2 screens, will result in a black screen. If I boot with one middle Display Port and after the login screen, connect the second screen, everything is shown. What could be a reason?

Do not execute or close after a second 😞

Aorus x570 pro/AMD 5900x Working in BigSure and Monterey