You should be able to write the ISO directly to a USB stick with dd (ie: "dd if=image.iso of=/dev/sdc bs=1M") and it should boot fine on your EFI system. I suspect usb-creator did nasty things to it.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1692876 Title: ubuntu-server ARM64 ISO images not EFI compliant To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-cdimage/+bug/1692876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs