adrahon/vagrant-kvm — pull request #52 by pdf (2013-09-03 02:29:58+00:00)
Title: Allow resuming saved machine state when gui is enabled

Attempting to resume a suspended (saved) machine would result in:

``` Call to virDomainUndefine failed: Requested operation is not valid:
Refusing to undefine while domain managed save image exists
(Libvirt::Error)
```

To mitigate this, do not attempt to modify the saved VM when resuming.