Occasionally, i found the solution.
We should complete the Graphic configuration in DeviceProperties of config.plist to figure out how many video ports are there on motherboard and which type are the ports, DP, HDMI or VGA.
If no configurations are there, macOS will fall into disorder about how...
Both monitor and HP are using displayport with displayport cable.
I tried to unplug and replug the cable when monitor went black, but signal did not come back.
There is DP1.2 enable/disable option in monitor menu. With DP1.2 option enabled, signal comes back when I turn off and turn...
MB:HP 600 G4. (HP 600G4 800G4 800G5 seems alike, these 3 can use the same EFI files)
Graphic:UHD630 with 2*DP 1*HDMI using right DP port.
After booting into the system, graphic works well.
But when I turn off the monitor, then turn...