[Bug 1990326] Re: ubuntu server 20.04.5 cannot be installed after enable secure boot

[shangsong]

Hi Timo,
  First, as i known, ubuntu 20.04 use subiquity as server installation program, not debian-installer.
  Second, the failure occur at the begining of installation. 
Therefore, how to use the debian-installer to fix the issue, could you provide the detail method for verification, thanks.

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Title:
  ubuntu server 20.04.5 cannot be installed after enable secure boot

Status in debian-installer package in Ubuntu:
  Invalid
Status in shim package in Ubuntu:
  Invalid
Status in debian-installer source package in Focal:
  Fix Committed
Status in shim source package in Focal:
  Invalid

Bug description:
  Reproduce steps
  1. Enable secure boot in the UEFI.
  2. Fresh install ubuntu server 20.04.5 lts and latest daily build, but it fail with "An unauthorized EFI image is detected, please enroll this EFI image or disable secure boot ...."

  Others:
  1. Both ubuntu server 18.04.6 and 22.04 can be normal installed.

  It seem the key of 20.04.x has been added into the latest UEFI
  Revocation List File(Release Date: August 12,
  2022.https://uefi.org/revocationlistfile/archive).

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