Comment # 5 on bug 1194184 from Takashi Iwai

I repeat the question again: did you install openSUSE-signkey-cert and properly
enroll it?  If yes for both and the kernel module verification still fails,
it's a bug to be fixed.

And, even if you don't enroll the cert, it's just flipping the kernel taint
flag  as long as the system is booted without secure boot; practically it has
no impact on the actual usage.