If I try to reboot my working FreeBSD machine in HyperV it does not work… FreeBSD somehow hangs the reboot procedure and I need to reboot my Windows server 2008 with Hyper-V – it can not be turned off even by clicking on “Turn off…” in a virtual machine context menu…

For now the only solution I found is to use command:

shutdown -p now

and when it turns off I turn it back on with Hyper-V console…

 🙂 hope it helps