[Bug 1849863] [NEW] shim-signed does not boot on Lenovo Yoga C630 WOS with enabled Secure Boot

[RussianNeuroMancer]

Public bug reported:

Hello!

In my attempt to workaround Bug 1839317 I tried to install shim-signed
and enable Secure Boot. Unfortunately, shim-signed binary does not boot
for some reason (screen stay black). I want to notice that if I try to
boot just with grub-efi-arm64-signed without shim binaries on esp
(partition was cleaned up, then grub reinstalled) I getting firmware
errors regarding invalid signature. So I guess when firmware validate
shim-signed signature it is valid, but then when firmware trying to
start shim-signed it get started but for some reason silently fail.

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

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https://bugs.launchpad.net/bugs/1849863

Title:
  shim-signed does not boot on Lenovo Yoga C630 WOS with enabled Secure
  Boot

Status in shim package in Ubuntu:
  New

Bug description:
  Hello!

  In my attempt to workaround Bug 1839317 I tried to install shim-signed
  and enable Secure Boot. Unfortunately, shim-signed binary does not
  boot for some reason (screen stay black). I want to notice that if I
  try to boot just with grub-efi-arm64-signed without shim binaries on
  esp (partition was cleaned up, then grub reinstalled) I getting
  firmware errors regarding invalid signature. So I guess when firmware
  validate shim-signed signature it is valid, but then when firmware
  trying to start shim-signed it get started but for some reason
  silently fail.

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