This bug was fixed in the package linux - 6.5.0-5.5

---------------
linux (6.5.0-5.5) mantic; urgency=medium

  * mantic/linux: 6.5.0-5.5 -proposed tracker (LP: #2034546)

  * Packaging resync (LP: #1786013)
    - [Packaging] update helper scripts
    - debian/dkms-versions -- update from kernel-versions (main/d2023.08.23)

 -- Andrea Righi <andrea.ri...@canonical.com>  Wed, 06 Sep 2023 15:51:04
+0200

** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/2030745

Title:
  Support initrdless boot on default qemu virt models and openstack

Status in linux package in Ubuntu:
  Fix Released

Bug description:
  Currently qemu & openstack for the most simple invocations of "virtio" drive 
type use virtio-blk.
  One can use virtio-scsi, and many do, but it's not a given.
  To continue support minimal images without initrd, and enable in-place 
no-change migration, we should also  make virtio-blk builtin.

  This can be revisited once openstack & qemu defaults change to virtio-
  scsi (if ever).

  Test cases:

  Qemu with `-drive if=virtio,format=$format,file=$image` should work,
  requires virtio-blk today.

  Qemu with `-device virtio-scsi-pci,id=scsi0 \
  -drive if=none,id=rootfs,format=$format,file=$image -device 
scsi-hd,drive=rootfs,bus=scsi0.0"` already works, requires virtio-scsi, and 
should continue to work.

  Openstack with

  openstack image create \
       --container-format bare \
       --disk-format qcow2 \
       --file my-minimal.qcow2

  should work and currently requires virtio-blk.

  Openstack with

  openstack image create \
       --container-format bare \
       --disk-format qcow2 \
       --property hw_disk_bus=scsi \
       --property hw_scsi_model=virtio-scsi \
       --file my-minimal.qcow2

  already works, and should continue to work, requires virtio-scsi.

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