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

[Brian Murray]

This is likely a duplicate of bug 1925010. What does "sudo dmesg | grep
EFI" return? If there is any EFI information from your current dmesg
please look in older files in /var/log/. Thanks in advance.

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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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