Hi,
The default boot parameters of our Vagrant images activate a serial console. The problem is that VirtualBox doesn't enable a serial port by default, and our boxes hang if they really need to use the console, e.g. during relabeling[1] or during the initial configuration required for sealed VM templates (what I'm currently trying for Hyper-V support).
Is anyone using the serial console we provide? If not, I can just remove the console=ttyS0 parameter from the kernel command line. Otherwise, a patch for Image Factory is trivial - I can just the set the port to enabled in the XML file, without the cable connected, and probably move console=tty0 on the last position, so it becomes the active console.
Libvirt and VMware don't cause this problem, because they either have a serial port by default, or pretend it's there if the guest tries to use it. No idea if Hyper-V or Xen default to having a serial port.
I would like to fix this for version 1704, which should be released in the following days.
Regards, Laurențiu