Hi, > Having said that I find Fedora does still buld shim 15.4 for > aarch64. We only exclude 32-bit, and I think RHEL does the > same. Whether anyone's tested SecureBoot on aarch64 in > Fedora/RHEL though, I'm not so sure. Well, at least the fedora shim builds are not signed with anything, and grub doesn't look much better: $ pesigcheck -v -i grubaa64.efi [ ... ] Signature has impossible time constraint: 1639158862 <= 1373397163 Peer's Certificate has expired. [ ... ] $ date --date @1373397163 Tue Jul 9 21:12:43 CEST 2013 ^^^^ I think we can take that as clear indication that nobody ever tested secure boot with fedora on aarch64 ;) take care, Gerd