VirtualBox VM hangs on shutdown / stopping

[Derek Schrock]

On Sat, Dec 09, 2017 at 05:49:57PM EST, Miroslav Lachman wrote:
> 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
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What are the chances that you're VNC'ed to the VM during shutdown?  I've
yet to gather all the parts but there is a bug in libvncserver/vbox that
fails to allow a VM to quit if the VNC session isn't closed before the
the VM is shutdown.