When I enable secure boot in X10DRC-LN4+, it shows message "WARNING: CSM is Loaded! Disable the CSM in Setup. Repeat operation after Reboot to ensure UEFI Video (GOP) driver is operational.".
In order to enable secure boot, try processor below:
- Boot into BIOS >> Advanced >> PCIe/PCI/PnP Configuration, Change the “onboard Video Option ROM” from “Legacy” to “EFI”. Save and exit the BIOS.
- Boot system to BIOS again. Then go to Security >> Secure Boot. In “Key Management”, enable the “Default Key Provision”.
- Disable the “CSM Support”.
- Enable the “Secure Boot”.