[Bug 1924752] Re: mac fails to boot after hirsute release upgrade (secureboot)

[Jim Tittsler]

Yes, it is EFI v1.10:

[    0.000000] efi: EFI v1.10 by Apple
[    0.484667] fb0: EFI VGA frame buffer device
[    0.532601] EFI Variables Facility v0.08 2004-May-17
[    0.984410] fb0: switching to radeondrmfb from EFI VGA

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https://bugs.launchpad.net/bugs/1924752

Title:
  mac fails to boot after hirsute release upgrade (secureboot)

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  After today trying `do-release-upgrade -d` on an iMac running Kubuntu
  20.10, the system now fails to boot, staying at the initial Mac white
  screen.

  (Trying to manually chroot/update-grub or using Boot-Repair does not
  solve the problem.)

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