Odd, it worked on all systems I've seen so far - it is not generally failing.
Can you check your `systemd-analyze dump` output if it contains something like the following: -> Unit qemu-guest-agent.service: Description: QEMU Guest Agent Instance: n/a Unit Load State: loaded Unit Active State: active State Change Timestamp: Mon 2020-06-15 06:42:38 UTC Inactive Exit Timestamp: Mon 2020-06-15 06:42:38 UTC Active Enter Timestamp: Mon 2020-06-15 06:42:38 UTC Active Exit Timestamp: Mon 2020-06-15 06:42:38 UTC Inactive Enter Timestamp: Mon 2020-06-15 06:42:38 UTC May GC: no Need Daemon Reload: no Transient: no Perpetual: no Garbage Collection Mode: inactive Slice: system.slice CGroup: /system.slice/qemu-guest-agent.service CGroup realized: yes CGroup realized mask: memory devices pids bpf-firewall bpf-devices CGroup own mask: memory pids Invocation ID: 240ad62495ab42118bd00254da1d7f12 Fragment Path: /lib/systemd/system/qemu-guest-agent.service Condition Timestamp: Mon 2020-06-15 06:42:38 UTC Condition Result: yes Assert Timestamp: Mon 2020-06-15 06:42:38 UTC Assert Result: yes Requires: sysinit.target (origin-default) Requires: system.slice (origin-file) BindsTo: dev-virtio\x2dports-org.qemu.guest_agent.0.device (origin-file) WantedBy: sys-devices-pci0000:00-0000:00:02.2-0000:03:00.0-virtio1-virtio\x2dports-vport1p1.device (destination-udev) .... -> Unit sys-devices-pci0000:00-0000:00:02.2-0000:03:00.0-virtio1-virtio\x2dports-vport1p1.device: Description: /sys/devices/pci0000:00/0000:00:02.2/0000:03:00.0/virtio1/virtio-ports/vport1p1 Instance: n/a Unit Load State: loaded Unit Active State: active State Change Timestamp: Tue 2020-06-09 11:11:56 UTC Inactive Exit Timestamp: Tue 2020-06-09 11:11:56 UTC Active Enter Timestamp: Tue 2020-06-09 11:11:56 UTC Active Exit Timestamp: n/a Inactive Enter Timestamp: n/a May GC: no Need Daemon Reload: no Transient: no Perpetual: no Garbage Collection Mode: inactive Slice: n/a CGroup: n/a CGroup realized: no Invocation ID: cb54e03654164f7e8b5d0019576e7767 Following Set Member: dev-vport1p1.device Following Set Member: dev-virtio\x2dports-org.qemu.guest_agent.0.device Wants: qemu-guest-agent.service (origin-udev) References: qemu-guest-agent.service (origin-udev) StopWhenUnneeded: no RefuseManualStart: no RefuseManualStop: no DefaultDependencies: yes OnFailureJobMode: replace IgnoreOnIsolate: yes Device State: plugged Sysfs Path: /sys/devices/pci0000:00/0000:00:02.2/0000:03:00.0/virtio1/virtio-ports/vport1p1 Found: found-udev udev SYSTEMD_WANTS: qemu-guest-agent.service -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1883009 Title: qemu-guest-agent / systemctl enable failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1883009/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs