[CentOS] CentOS 6 guest OS does not detect reboot/shutdown signal from virt-manager

[Dirk Olmes]

> 
>From the virt-manager, I am able to shutdown/reboot the Debian and
> Ubuntu guest OSs but not the CentOS 6 guests.
> 
> For the CentOS 6 guests, I have to resort to "Force off"

Install the acpid package and make sure it is properly started when the
VM starts.

-dirk