Public bug reported:

SRU Justification

[Impact]

At present, if a virt instance is hibernated and restarted in a
different environment, the instance will crash. We have seen situations
where customers have to enable support cases to recover an instance. The
proposed patch is supposed to enable the kernel to detect the change and
reboot the instance instead of crashing. In the ACPI specification;
there is a 'hardware signature' field in the ACPI tables, and the OS can
reboot cleanly if/when that signature changes, instead of attempting the
resume and crashing.

[Fix]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=74d95555
https://lore.kernel.org/lkml/9099d8903e9b2b16daec712acc9aa533fe84d102.ca...@infradead.org/T/#u

[Test Case]

Hibernate an AWS instance, resume on a different platform.

[Where things could go wrong]

Resume currently crashes when a hibernated instance is migrated to a new
machine. It can't get much worse, unless the initial hibernate fails.

[Other Info]

SF: #00330794

** Affects: linux-aws (Ubuntu)
     Importance: Medium
     Assignee: Tim Gardner (timg-tpi)
         Status: In Progress

** Affects: linux-aws (Ubuntu Focal)
     Importance: Medium
     Assignee: Tim Gardner (timg-tpi)
         Status: In Progress

** Affects: linux-aws (Ubuntu Impish)
     Importance: Medium
     Assignee: Tim Gardner (timg-tpi)
         Status: In Progress

** Affects: linux-aws (Ubuntu Jammy)
     Importance: Medium
     Assignee: Tim Gardner (timg-tpi)
         Status: In Progress

** Also affects: linux-aws (Ubuntu Impish)
   Importance: Undecided
       Status: New

** Also affects: linux-aws (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Also affects: linux-aws (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: linux-aws (Ubuntu Focal)
   Importance: Undecided => Medium

** Changed in: linux-aws (Ubuntu Focal)
       Status: New => In Progress

** Changed in: linux-aws (Ubuntu Focal)
     Assignee: (unassigned) => Tim Gardner (timg-tpi)

** Changed in: linux-aws (Ubuntu Impish)
   Importance: Undecided => Medium

** Changed in: linux-aws (Ubuntu Impish)
       Status: New => In Progress

** Changed in: linux-aws (Ubuntu Impish)
     Assignee: (unassigned) => Tim Gardner (timg-tpi)

** Changed in: linux-aws (Ubuntu Jammy)
   Importance: Undecided => Medium

** Changed in: linux-aws (Ubuntu Jammy)
       Status: New => In Progress

** Changed in: linux-aws (Ubuntu Jammy)
     Assignee: (unassigned) => Tim Gardner (timg-tpi)

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https://bugs.launchpad.net/bugs/1965002

Title:
  AWS: Hibernate resume crashes when platform changes

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