This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1648449

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1648449

Title:
  NVMe drives in Amazon AWS instance fail to initialize

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]

  On an Amazon AWS instance that has NVMe drives, the NVMe drives fail
  to initialize, and so aren't usable by the system.  If one of the NVMe
  drives contains the root filesystem, the instance won't boot.

  [Test Case]

  Boot an AWS instance with a NVMe drive.  It will fail to initialize
  the NVMe drive(s), and errors will appear in the system log (if the
  system boots at all).  With a patched kernel, all NVMe drives are
  initialized and enumerated and work properly.

  [Regression Potential]

  Patching the NVMe driver may cause problems on other systems using
  NVMe drives.

  [Other Info]

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