Hello, I was receiving the same message above when unraid boots...
12th Gen Intel® Core™ i5-12600
1. I have set CPU in BIOS to primary graphics (not auto)
- added i915.force_probe=4680 to Global Configuration in Flash memory settings
- ran echo "blacklist i915" > /boot/config/modprobe.d/i915.conf
I can now use UNraid GUI mode