[libvirt] How does virt-manager send shutdown?

[Daniel P. Berrange]

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
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