Hello Mr. Oberhage,

thanks for the bug report.

Am Wed, Nov 05, 2025 at 02:07:03PM +0100 schrieb H.-R. Oberhage:
> When starting a Xen PV VM, virt-manager shows the message:
> "This VM has no graphic display device".
> This concerns the "Display VNC" driver.
>
> This behavior started for all such VMs after the transition from
> Devuan Daedalus to Devuan Excalibur. Before that, they worked fine.

I just checked that VMs here migrated successfully and work as expected.

Can you please check, that the device config of your VM has proper
video device and a display device. I'm using video device "virtio"
and display device "spice" here.

I found some rumors via google, that after update of libvirt,
others observed such issues too. (quite a while ago, however)
It could be also a problem with apparmor preventing
the virt-viewer to access the stream.

After starting the vm, you could try to run:

$sudo apparmor_status

This might show were apparmor prevented access. (I have absolutely no
experience using apparmor)

Best regards,
Andreas

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