Bug#1000496: upgrade-reports: libvirt/kvm/qemu/grub - XML-generated VMs working under buster fail with bullseye

[Chris Hofstaedtler]

Control: retitle -1 VMs created on buster do not boot on bullseye
Control: severity -1 normal
Control: tags -1 + moreinfo
Control: reassign -1 virt-daemon

Hi everyone,

I just spent some time trying to reproduce this, until I re-read the
bug report more carefully. I think it says, in my words:

---
libvirt VMs created on buster, do not boot on bullseye.
Reinstalling the OS inside the existing VM does not change the
situation.
---

To properly reproduce this, one would need a VM created on buster. I
imagine one could install buster in a libvirt VM and use that to
create a VM, but I find it questionable this will yield results.
("Obviously" creating new VMs in sid just works.)

The best course of action would be more info from the submitter,
preferably at least the full VM XML definition.

For now reassigning to the libvirt folks (+moreinfo), as they might
have some insight or might remember differences between buster and
bullseye.  Grub seems unlikely to be in a position to fix anything
for already existing VMs.

Chris