This bug is awaiting verification that the linux-aws/5.4.0-1070.74
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-focal' to 'verification-done-focal'. If the
problem still exists, change the tag 'verification-needed-focal' to
'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-focal

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Packages, which is subscribed to linux-aws in Ubuntu.
https://bugs.launchpad.net/bugs/1965002

Title:
  AWS: Hibernate resume crashes when platform changes

Status in linux-aws package in Ubuntu:
  Fix Committed
Status in linux-aws source package in Focal:
  Fix Committed
Status in linux-aws source package in Impish:
  Fix Committed
Status in linux-aws source package in Jammy:
  Fix Committed

Bug description:
  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. Positive
  test results from Amazon engineers.

  [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

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