Turns out the *unsigned* 2.04-1ubuntu44.2 binary boots fine - the issue only seems to occur w/ the signed one. I also tried the 2.04ubuntu44.2 grubnetaa64.efi.signed from -updates, which has a different checksum (different sig?), and the failure also occurs there. To be clear, this system does not have SecureBoot enabled, and does not appear to be passing through shim.
** Also affects: grub2-signed (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1934192 Title: regression between 2.04-1ubuntu44 and 2.04-1ubuntu44.2 breaks netboot on arm64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1934192/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs