With the revised test case, confirm that 20.04.5 media fails to boot with (under OVMF) 'Access Denied'.
Downloading https://cdimage.ubuntu.com/focal/daily-live/20230314.1/focal-desktop-amd64.iso, the boot also fails. This time it fails with an error from shim when trying to chain to grub: 'Verification failed: (0x1A) Security Violation'.
This is because archive publication of the signed binaries from grub has changed, and debian-installer was not updated to know this so was still picking up the last grub*.efi published under the old method.
Working on fixing debian-installer now.
With the revised test case, confirm that 20.04.5 media fails to boot with (under OVMF) 'Access Denied'.
Downloading https:/ /cdimage. ubuntu. com/focal/ daily-live/ 20230314. 1/focal- desktop- amd64.iso, the boot also fails. This time it fails with an error from shim when trying to chain to grub: 'Verification failed: (0x1A) Security Violation'.
This is because archive publication of the signed binaries from grub has changed, and debian-installer was not updated to know this so was still picking up the last grub*.efi published under the old method.
Working on fixing debian-installer now.