*** This bug is a duplicate of bug 1925010 ***
https://bugs.launchpad.net/bugs/1925010
** This bug has been marked a duplicate of bug 1925010
shim-signed 15.4 does not boot on EFI 1.10 systems
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Yes, it is EFI v1.10:
[0.00] 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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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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Using boot-repair to disable secureboot (purging and reinstalling GRUB2)
now allows booting again.
** Summary changed:
- mac fails to boot after hirsute release upgrade
+ mac fails to boot after hirsute release upgrade (secureboot)
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