I had been running fine on Catalina with OC 0.6.7 and had a secondary SSD drive that I had been using for testing Big Sur as well as new releases of Premiere and Resolve. Things were looking pretty stable, so I decided to take the plunge and update my primary SSD to Big Sur. Everything seemed fine. The update went smoothly and I started playing around remotely (screen sharing in from my wife's MacBook Air from downstairs) and I accidentally clicked "Remote Management". That's when things went to hell. The screen share closed and when I tried to reconnect, it prompted me for a username and password. None of the permutations I typically use would work. When I went back upstairs to the system itself, I could no longer use a keyboard plugged into any of the USB ports.
I managed to turn off Remote Management by taking the SSD out of that system, and booting to it on my newer Z490/10850K system (a saga unto itself) with the appropriate EFI folder.
I can use the keyboard plugged into USB to access BIOS and the OpenCore menu, but somewhere during the OS loading, it drops out.
I've tried every previously good version of OpenCore I had used with Big Sur on that system with no change.
I even tried clearing CMOS.
The same thing is happening with a BigSur USB installer. I'm going to try it with a Catalina USB installer next, but I'd love to understand what's happening. I don't think I fried my motherboard, otherwise I wouldn't have USB access during BIOS, right?
Specs are below.
CPU: i7-6700K
GPU: GTX 770
RAM: 32 GB 3200 MHz Corsair Vengeance LPX
Motherboard/Laptop Make and Model: GA Z170n-WiFi ITX
Audio Codec: ALC1150
Ethernet Card: Intel I219
Wifi/BT Card: Broadcom 4352
Touchpad and touch display devices: N/A
BIOS revision: F20
Which of the guides on the sidebar you used: Dortania OpenCore
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