[vbox-dev] (Bug?)VT-Bit

Michal Necasek michal.necasek at oracle.com
Fri Feb 3 12:06:45 GMT 2017

Could you please provide a VBox.log? You can just attach it to the e-mail. That will tell us what's going on. 


----- Original Message ----- 
From: lyons_dj at yahoo.com 
To: vbox-dev at virtualbox.org 
Sent: Friday, February 3, 2017 12:46:46 PM GMT +01:00 Amsterdam / Berlin / Bern / Rome / Stockholm / Vienna 
Subject: [vbox-dev] (Bug?)VT-Bit 

I changed my CPU from one that supports VT-x to one that doesn’t, now none of my virtual machines will run 

Failed to open a session for the virtual machine Tiger . 

VT-x is not available (VERR_VMX_NO_VMX). Result Code: 	NS_ERROR_FAILURE (0x80004005) 
Component: 	ConsoleWrap 
Interface: 	IConsole {872da645-4a9b-1727-bee2-5585105b9eed} 

I edited the .vbox-prev of the virtual machines, and added: 

<HardwareVirtEx enabled=“false”/> 

But every time I launch VB, it overwrites the settings, removes <HardwareVirtEx enabled=“false”/>. 

I can’t access the Acceleration tab in VB, it’s greyed out, but it must have the VT-x checkbox checked? 

Is there some preference file I need to delete? 

macOS Sierra 10.12.2 

VB 5.1.14 r112924 (Qt5.6.2)
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