Dell XPS 8940 - OpenCore OpenCore 0.7.8 - macOS Big Sur 11.6.3 - BIOS version 2.4.0
Shutdown/Reboot/Sleep works without any issue.
GENERATE YOUR OWN SMBIOS deets (SN/MLB/UUID/ROM) -- they are EMPTY right now!
(use genSMBIOS with iMac19,1 https://github.com/corpnewt/GenSMBIOS)
System: Dell XPS 8940
CPU: Intel i5-10400
RAM: 1x8GB DDR4-2666, 1x16GB DDR4-2666
SSD: KINGSTON SA400S37240G Media
GPU: Nvidia Quadro K2000 2GB
iGPU: UHD 630 (enabled) VDA Decoder: Fully Supported
AirPort/WiFi: not working/untested
Audio: ALC3861 (actually ALC899)
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USB Mapped for all front USB ports + all USB3.0 ports on the back (no USB2.0 ports due to port limit (15))
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BIOS v2.4.0
change to AHCI instead of RAID disable all SGX, security features do not touch Sleep States, Performance states, SpeedShift etc. Leave them at defaults