Further to my disappearing /var/run/utmp query, I also newly can't start VMs with virt-manager without first doing $ sudo modprobe tun This has also changed recently, apparently without intervention on my part. Presumably it has stopped being autoloaded somewhere. Should tun be in /etc/modules-load.d/modules.conf or is there an on-demand approach which seems to have been corrupted? Thanks, Gareth