2.2.4 Troubleshooting Secure Boot

You might encounter the following problems when Secure Boot is enabled.

• Secure boot violation: Invalid signature detected. Check Secure Boot Policy in Setup. — The grub loader has an invalid signature.

  Note:

  Even though a certificate may expire, the validation is based on the date on which the grub & kernel were signed and if the certificate was valid at that time.
• error: file has invalid signature. error: You need to load the kernel first. — The grub loader is signed, but the kernel is unsigned.
• ERROR: Verification failed: (15) Access Denied. Failed to load image: Access Denied.start_image() returned Access Denied — The ISO image being loaded to image the server is not signed.