Comment # 3 on bug 1209985 from Andrei Borzenkov

(In reply to Carlos Gonzalez from comment #2)
> Exact error message:
> 
> Verifying shim SBAT data failed: Security Policy Violation
> Something has gone seriously wrong: SBAT self-check failed: Security Policy
> Violation
> 
> Which appears right after BIOS's splash pic, but does not allow Grub to
> boot, and instead self shuts down immediately.

Are you using multiboot? What openSUSE or other distributions are used?