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I am trying to install a centos virtual host on my ubuntu laptop but I cannot enable the VT extensions in the BIOS.

I have updated to the latest BIOS from Dell the processor is a core 2 duo so it definitely supports the VT extensions.

Any ideas?

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up vote 3 down vote accepted

Some vendors, like Sony, for my Vaio, disable Intel VT and do not provide a BIOS option to turn it on, even though the processor supports it fine. I managed to enable it on my Vaio, but not without a serious amount of research, luck and trouble.

If there is not option in your BIOS and you are sure your specific Core2Duo supports VT, complain at Dell Support and / or hope someone was able to binary patch your BIOS. I was lucky with the last option. Maybe there is such a patch for your BIOS too.

UPDATE: According to post in this thread the T6400 and T5800 does not support Intel VT. One of those is - according to Google - the processor in your laptop...

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Agreed wzzrd, as far as I can tell none of the processors available on that model support hardware virtualisation. – Chopper3 Jun 22 '09 at 13:01
thanks for the info I did not know that my processor did not support the extension I wrongly assumed all core 2 duos had the extension – Paul Whelan Jun 22 '09 at 17:09

Which Core 2 Duo? Not all Core 2s have the VT extensions.


PS See for a list of which Core 2's support VT.

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You can check the processor flags using cpuinfo or grep "vmx" /proc/cpuinfo | uniq

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