Ubuntu
ubuntu-release-upgrader package

mac fails to boot after hirsute release upgrade (secureboot)

Bug #1924752 reported by Jim Tittsler
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubuntu-release-upgrader (Ubuntu)
New
Undecided
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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.)

See original description
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Jim Tittsler (jwt) wrote :
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Jim Tittsler (jwt) wrote :
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Jim Tittsler (jwt) wrote :
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Jim Tittsler (jwt) wrote :
description: updated
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Jim Tittsler (jwt) wrote :

Using boot-repair to disable secureboot (purging and reinstalling GRUB2) now allows booting again.

summary: - mac fails to boot after hirsute release upgrade
+ mac fails to boot after hirsute release upgrade (secureboot)
Revision history for this message
Brian Murray (brian-murray) wrote :

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.

Revision history for this message
Jim Tittsler (jwt) wrote :

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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