VirtualBox VM hangs on shutdown / stopping

[Miroslav Lachman]

I did a fresh installation on FreeBSD 10.4-RELEASE-p5 amd64 GENERIC.

Whenever I need to stop the VM it hangs indefinitely. The OS in VM is 
also FreeBSD 10.4-p5 amd64. Virtual machine runs fine, but if is use 
shutdown -r now, shutdown -p now (in VM) or use ACPI PowerOff in 
phpVirtualBox or VBoxManage it always hangs after OS in VM is completely 
down (buffers synced etc.)

Packages used:
   virtualbox-ose-kmod-5.2.0_1
   virtualbox-ose-nox11-5.2.0_1

Built with Options        :
         PYTHON         : off
         R0LOGGING      : off
         UDPTUNNEL      : on
         VDE            : on
         VNC            : on
         WEBSERVICE     : on


   The process is still running:

# ps auxww | grep FBSD_104_tpl
vboxusers 1268   0.0  5.3 1062960 891668  -  I    11:30PM   0:32.43 
/usr/local/lib/virtualbox/VBoxHeadless --comment FBSD_104_tpl --startvm 
ba50a283-41fa-48ae-8ff2-87591c50bfed --vrde config

# VBoxManage list vms
"FBSD_104_tpl" {ba50a283-41fa-48ae-8ff2-87591c50bfed}

    but no running VMs listed by VBoxManage

# VBoxManage list runningvms

# VBoxManage controlvm "FBSD_104_tpl" poweroff
VBoxManage: error: The virtual machine is being powered down
VBoxManage: error: Details: code VBOX_E_INVALID_VM_STATE (0x80bb0002), 
component ConsoleWrap, interface IConsole, callee nsISupports
VBoxManage: error: Context: "PowerDown(progress.asOutParam())" at line 
578 of file VBoxManageControlVM.cpp

The above is the second try to stop VM after few minutes of waiting on 
"Stopping" in phpVirtualBox.

It must be killed by "kill PID", then I can run the VM again. 
(phpVirtualBox says "Aborted")


Can anybody help me to debug and fix this issues?

I never see this problem on different machines with slightly older 
version of VirtualBox. We are using the same setup for years.

Miroslav Lachman