Yes, it's absolutely possible to recreate the environment for testing
this without MAAS -- there's nothing all that special to it,
chainloading *any* image should work and maintain a Secure Boot-verified
chain provided all the links in the chain validate images.

This looks to be pretty clearly a bug in chainloader's validation of
images, it used to work, but only because it wasn't actually verifying
much of it in the first place.

** Changed in: grub2 (Ubuntu)
       Status: New => In Progress

** Changed in: grub2 (Ubuntu)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

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https://bugs.launchpad.net/bugs/1711203

Title:
  Deployments fail when Secure Boot enabled

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