Ubuntu
linux-hwe-edge package

  1. Xenial (16.04)
  2. Bug #1734147
  3. Comment #618

Comment 618 for bug 1734147

Revision history for this message
Mathieu Trudel-Lapierre (cyphermox) wrote :

If you can still boot to Ubuntu with an older kernel (one that is signed), here's what you can do:

1) Download http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/uefi/grub2-amd64/2.02~beta2-36ubuntu3.20/grubx64.efi.signed.

2) Copy grubx64.efi.signed over /boot/efi/EFI/ubuntu/grubx64.efi:
sudo cp grubx64.efi.signed /boot/efi/EFI/ubuntu/grubx64.efi

3) Reboot; you should now be able to load the new unsigned kernel that allows fixing firmware / SPI.

4) Once you're satisfied that things work; boot to Ubuntu with a standard, signed kernel, and re-install the right GRUB version for your system:

sudo grub-install