[libvirt] How does virt-manager send shutdown?

[Bryan Kearney]

Bryan Kearney wrote:
> Daniel P. Berrange wrote:
>> On Fri, Aug 01, 2008 at 01:22:43PM -0400, Bryan Kearney wrote:
>>> How does virt-manager send shutdown to guests? Does it depend on if 
>>> you are running kvm or xen? I have been building images with acpid 
>>> enabled and acpi=force on the command line. After upgrading to f9 and 
>>> running kvm my images no longer respond to shutdown. Is there a tweak 
>>> which I have missed?
>>
>> virt-manager  just invokes the shutdown API in libvirt, which has 
>> different
>> impls depending on the underlying hypervisor. In KVM case it invokes the
>> QEMU 'system_shutdown' command, which then triggers an ACPI power button
>> event in the guest. You need to make sure your guest has the <acpi/>
>> feature enabled in its XML config of course, and that the kernel has 
>> activated ACPI (may need the acpi=force param), and that acpid is 
>> running.
>> IIRC certainly KVM versions have a bug wrt this causing it not to work
>>
>> Daniel
> 
> I added the following to my xml
> 
>       <features>
>         <feature>
>                 <acpi/>
>         </feature>
>         </features>
> 

One follow up question. Any reason that this should _not_ be the default 
  set up by the appliance-creator?