Comment 10 for bug 1929634

After discussing with my nova colleagues, this is not happening on wallaby/master because we started parsing firmware descriptor files as part of the secure boot work [1]

The proposed workaround of excluding edk2-ovmf-20200602gitca407c7246bf-5 seems to work and we recommend that we keep it until bz1961562 [2] mentioned above has a fix released.

There's another possible workaround if this is not possible anymore and that would involved creating files under /etc/qemu on the compute nodes as mentioned in comment #16 of that same bz

  mkdir -p /etc/qemu/firmware
  touch /etc/qemu/firmware/50-edk2-ovmf-cc.json

This will create an empty file which can disable the new firmware, more details here [2], look for firmware description.

[1] https://github.com/openstack/nova/blob/b0cd985f0c09088098f74cc0cb1df616cc0ef12b/nova/virt/libvirt/host.py#L1601-L1664
[2] https://bugzilla.redhat.com/show_bug.cgi?id=1961562
[3] https://libvirt.org/formatdomain.html#operating-system-booting