[Bug 1925064] [NEW] shim(-signed)? does not boot on T420

[Andreas Hasenack]

Public bug reported:

Almost identical to bug #1925010, but the T420 is an UEFI v2.00 machine,
so I'm filing this separate bug.

This is a T420 in uefi mode, but not secure boot. I was running groovy,
and just upgraded to hirsute with do-release-upgrade -d. It just
wouldn't boot from the disk anymore after that. Black screen, no disk
activity, no ctrl-alt-del response. I always had to power cycle it.

I then performed the steps from comment 2 of that bug, and the machine booted normally after that:
"""
Can you please check that the machine boots with just grub without shim.

Aka, replace /EFI/Boot/BOOTX64.efi & /ef/ubuntu/shimx64.efi files wtih /efi/ubuntu/grubx64.efi => this could possibly be a workaround, given that secureboot is not possible on Mac platforms.
"""


My BIOS version is 1.49 (83ET79WW), model is 4177CTO. I can attach more info if needed, and it's also simple to restore the buggy behavior.

dmesg says "efi: EFI v2.00 by Lenovo"

** Affects: shim (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to shim in Ubuntu.
https://bugs.launchpad.net/bugs/1925064

Title:
   shim(-signed)? does not boot on T420

Status in shim package in Ubuntu:
  New

Bug description:
  Almost identical to bug #1925010, but the T420 is an UEFI v2.00
  machine, so I'm filing this separate bug.

  This is a T420 in uefi mode, but not secure boot. I was running
  groovy, and just upgraded to hirsute with do-release-upgrade -d. It
  just wouldn't boot from the disk anymore after that. Black screen, no
  disk activity, no ctrl-alt-del response. I always had to power cycle
  it.

  I then performed the steps from comment 2 of that bug, and the machine booted normally after that:
  """
  Can you please check that the machine boots with just grub without shim.

  Aka, replace /EFI/Boot/BOOTX64.efi & /ef/ubuntu/shimx64.efi files wtih /efi/ubuntu/grubx64.efi => this could possibly be a workaround, given that secureboot is not possible on Mac platforms.
  """

  
  My BIOS version is 1.49 (83ET79WW), model is 4177CTO. I can attach more info if needed, and it's also simple to restore the buggy behavior.

  dmesg says "efi: EFI v2.00 by Lenovo"

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1925064/+subscriptions