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[Felipe Reyes <2043987@xxxxxxxxxxxxxxxxxx>]

This is the commit that made the <acpi /> node fail -
https://github.com/libvirt/libvirt/commit/d8e95ab6b7c45acc121746e2e24edcfca3d8d8a0

** Also affects: nova
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/2043987

Title:
  unsupported configuration: machine type 's390-ccw-virtio-mantic' does
  not support ACPI

Status in OpenStack Compute (nova):
  New
Status in Ubuntu on IBM z Systems:
  New
Status in nova package in Ubuntu:
  New

Bug description:
  [Impact]

  Fails to launch instances on s390x. The following error is raised:

  Details: Fault: {'code': 500, 'created': '2023-11-19T18:28:12Z',
  'message': "Exceeded maximum number of retries. Exceeded max
  scheduling attempts 3 for instance
  66eebf5b-01fa-48b8-a8de-58dcf9787fd0. Last exception: unsupported
  configuration: machine type 's390-ccw-virtio-mantic' does not support
  ACPI"}. Request ID of server operation performed before checking the
  server status req-4d52df6d-f4de-486e-8831-08757d083ef9.

  [Environment]

  Ubuntu 23.10
  OpenStack 2023.2 (bobcat)
  Nova 3:28.0.0-0ubuntu1
  libvirt 9.6.0-1ubuntu1
  qemu-system-s390x 1:8.0.4+dfsg-1ubuntu3

  [Test Case]

  Launch an instance on a s390x hypervisor

  Expected result: the new instance reaches ACTIVE state

  Actual result: the instance fails to start with the following error:
  "unsupported configuration: machine type 's390-ccw-virtio-mantic' does
  not support ACPI"

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