This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1877620

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/1877620

Title:
  Backport  of Patch "ata: ahci: Add shutdown to freeze hardware
  resources of ahci"

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Issue
  --------------
  During our internal testing, we found an issue for kexec -e.  

  Using kexec to reboot works mostly, but ~1 of 5 times the system fails
  to reboot. SATA failures in new kernel resulting in drop to initramfs
  as rootfs isn't loadable.

  Error log for 1)
  [   47.384805] ata1: failed to reset engine (errno=-5)
  [   47.384805] ata1: failed to reset engine (errno=-5)
  [   51.529054] ata1: softreset failed (1st FIS failed)
  [   51.529054] ata1: softreset failed (1st FIS failed)
  [   57.888800] ata1: failed to reset engine (errno=-5)
  [   57.888800] ata1: failed to reset engine (errno=-5)
  [   62.037258] ata1: softreset failed (1st FIS failed)
  [   62.037258] ata1: softreset failed (1st FIS failed)
  [   68.396807] ata1: failed to reset engine (errno=-5)
  [   68.396807] ata1: failed to reset engine (errno=-5) 

  Solution
  --------
  https://patchwork.ozlabs.org/patch/1229154/ i.e. ata: ahci: Add shutdown to 
freeze hardware resources of ahci needs to applied to all applicable Linux 
version. 

  Please note this patch is already applied to main-line and back-ported
  to 4.9, 4.14, 4.19, 5.4 and 5.5

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