How do you autostart a KVM VM with virt-manager? [duplicate]

As far as automatically starting/stopping and you're using virsh you can do that like this (as a privileged user)

virsh autostart Domain

I'm not sure why virt manager isn't giving you any output. It does have a connection to the machine hosting machine right? It should show a list of domains if it's connected.

Open the VM display, click View->Details

Select Boot Options, and tick Start virtual machine on host boot up

The answer by Tim is the way to go, and virsh allows you to do many useful things besides that.

To set a virtual machine to be automatically started, you use:

# virsh autostart <domain-id>

The <domain-id> is either the virtual machine's number, UUID or a "friendly name" like "debian1", which you entered in virt-manager.

To get a list of virtual machines (numbers and names), use:

# virsh list --all

In my case I get:

 Id Name                 State
----------------------------------
  1 other                running
  2 other-clone          running

So I've used:

# virsh autostart other

install virsh then

virsh list                    (this will print list of your VMs)
virsh dominfo your_vm_name    (get info about selected VM)
virsh autostart your_vm_name  (set autostart of selected VM)

You can also place a symlink to the guest domxml in /etc/libvirt/qemu/autostart:

Will look like this for a VM named "test":
test.xml -> /etc/libvirt/qemu/test.xml