Asrock z390 ITX/ac cold boot Display port issue LG 32GK650F

Asrock z390 ITX/ac cold boot Display port issue LG 32GK650F

I have an issue were my rig will not boot past the splash screen from cold boot when connected to my LG 32GK650F via display port.

I have a vesa certified cable with no connection on pin 20

If I use HDMI then no issue, If I connect to my older Dell monitor via Display port then no issues.

I have to power cycle the rig to get it to boot but it still stays at the splash logo for 20 seconds before boot.???

The system is dual boot 10.15.7 and Win 10 (Opencore 0.6.1)

Hardware:

Asrock z390 ITX/ac

i9 9900K

Sapphire Nitro + RX 5700 XT

Corsair Vengeance LPX 3200MHz 32GB

https://preview.redd.it/dt37ccg23uq51.jpg?width=1280&format=pjpg&auto=webp&s=1a3917889eb19a70015b2cef166f103ca818f557

submitted by /u/Baja-king
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