ERROR: VT-x is not available. (VERR_VMX_NO_VMX).

[mumaniho]

i got this error while trying to Run Chrome OS in a VirtualBox .

I'm on Mac OS X Snow Leopard 10,6,8 , intel core 2 duo 3.0

and i am running the lastest version of virtualbox which is VirtualBox 4.1.6 for OS X hosts

i've tried editing XML file ( which is a prev now ) to disable it but it just doesn't work, i get the exact same error and when i go to prev file to check it , it just added again the line Hard... ="true"

i edit it and looks like this :

<CPU count="1" hotplug="false">
<HardwareVirtEx />
<HardwareVirtExNestedPaging enabled="true"/>
<HardwareVirtExVPID enabled="true"/>
<PAE enabled="true"/>
<HardwareVirtExLargePages enabled="false"/>
<HardwareVirtForce enabled="false"/>
</CPU>

then i say everything is fine, save, close & reopen virtuabox, run Chrome OS and again same problem i go check prev file and looks like this :

<CPU count="1" hotplug="false">
<HardwareVirtEx enabled="true" exclusive="false"/>
<HardwareVirtExNestedPaging enabled="true"/>
<HardwareVirtExVPID enabled="true"/>
<PAE enabled="true"/>
<HardwareVirtExLargePages enabled="false"/>
<HardwareVirtForce enabled="false"/>
</CPU>

Its like it adds itself !

this is the error im getting

Fallo al abrir una sesión para la máquina virtual Chrome OS.

VT-x is not available. (VERR_VMX_NO_VMX).

Código Resultado: NS_ERROR_FAILURE (0x80004005)
Componente: Console
Interfaz: IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb}

please give me some help

[Perryg]

Tell me you saw the first 3 lines in that file!

If you must change things use VBoxManage to do so.
See Chapter 8 VBoxManage in your VirtualBox users guide.

Why are you trying to set the VT-x flag to false anyway? The error indicates that the OS need hardware virtualization, which it appears that you do not have enabled.

[nobre84]

The C2D 3.0 (E7500 ?) Does not have hardware VT, so it is impossible to enable it.
I have similar issue using E7400 and E7500 on both Windows or Mac OS Hosts, the GUI won't allow me to disable hardware VT, so the VM will not start.
However, I can disable it in the XML file, just make sure all VirtualBox processes are closed before you edit it.
Change <HardwareVirtEx enabled="true" exclusive="false"/>
into <HardwareVirtEx enabled="false" exclusive="false"/>
And thats it.