On 07/12/2021 11:28, Ján Tomko wrote: Would that "bug" be a reason why my libvirtd fails? I have libvirtd.service started and see that in the logs, then suffices I do: -> $ virsh list --all (having no VMs started) I next thing in the logs is: ... internal error: The provided value contains invalid characters: Solarstorm SFN5162F SFP+ Server Adapter internal error: The string resource has invalid characters in its value Stopping Virtualization daemon... libvirtd.service: Deactivated successfully. Stopped Virtualization daemon. I'm on Centos 9 with libvirt-daemon-7.9.0-1.el9.x86_64. With .service failed I still can start a VM. -> $ systemctl status -l libvirtd.service ○ libvirtd.service - Virtualization daemon      Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; disabled; vendor preset: dis>      Active: inactive (dead) since Mon 2021-12-13 09:32:04 GMT; 5min ago TriggeredBy: ○ libvirtd-tcp.socket              ● libvirtd-ro.socket              ● libvirtd-admin.socket              ● libvirtd.socket              ○ libvirtd-tls.socket Is it that these versions and/or Centos 9 have introduced new (different defaults) ways to use/mange 'libvirtd', with .socket and no .service? many thanks, L