I suspect grub-check-signatures needs to be taught how to handle vmlinux.gz files like we did for shim's is-not-revoked tool. But I don't know why that would only be an issue on bionic.
I suspect grub-check- signatures needs to be taught how to handle vmlinux.gz files like we did for shim's is-not-revoked tool. But I don't know why that would only be an issue on bionic.