In previous versions the presence of Windows and/or Linux EFI partitions crashed the app
Sorry about that! I am on macOS 11.2, OpenCore 6.6.0, BIOS firmware F9i (also occurs on F9g). What happens at boot without verbose mode enabled is that it hangs on the Apple logo. Turning on verbose mode shows me the output I provided, but I'm not getting anywhere trying to decipher it through searching different terms.
Is CFG-Lock disabled in BOOT section of BIOS Setup? In F9i we must disable it ourselves.
That's correct. All the BIOS parameters are also set according to your instructions in the mini-guides.
Unfortunately I cannot think of anything else. If both monitors are relatively recent models with native support for DisplayPort (i.e. you are using straight DP-to-DP video cables) then they should work after waking from sleep. However, also try resetting both monitors to their factory default settings via the monitor's on-board menu. If the monitor gives you a choice between DP 1.1 and DP 1.2, try DP 1.1 first.
Thank you for the advice, I'll try that!
I am afraid WIN10 will screw things up for me.
No worry
So what ended up working to boot properly with CSM support enabled was Setting XHCI Handoff → Enabled. I thought for sure I had done this, but triple-checking revealed I had not. I have no idea why (is it obvious from the logs?), but worth leaving here in case others search for it in the future. This might not have any effect on my monitor sleep issue, but it at least satiates my curiosity as to why enabled CSM support was preventing startup for just me.
