I'd like to perform a "Reverse" bisect to figure out what commit fixes
this bug.  We need to identify the last kernel version that had the bug,
and the first kernel version that fixed the bug.

Can you test the following kernels and report back:

v4.6 Final:  http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety/
v4.8 Final:  http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8/
V4.10 Final:  http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10/


You don't have to test every kernel, just up until the first kernel that
does not have the bug.

Thanks in advance!

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https://bugs.launchpad.net/bugs/1797092

Title:
  xenial guest on arm64 drops to busybux under openstack bionic-rocky

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Bionic:
  Triaged

Bug description:
  on openstack rocky-bionic (with patch, see 1771662), xenial guests
  will fail to launch as they drop to the busybox prompt after booting.
  However, bionic guests will build and launch successfully.

  Dann F believes this may be related to the xenial image not containing
  appropriate acpi modifications.

  xenial guest console log:

  https://pastebin.canonical.com/p/ntRxFJTvjV/

  xenial virshxml:

  https://pastebin.canonical.com/p/cCY4ZVynP7/

  bionic virshxml for comparison:

  https://pastebin.canonical.com/p/MSV3xG7t7g/

  validation:

  https://pastebin.canonical.com/p/nC9pfSkXVs/

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