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4 Posts

07-15-2014

United States

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Intel VT-x on T440? (64-bit Virtual Machine Support)

2014-07-15, 2:48 AM

[Edit: SOLVED! I didn't realize that VT-d builds on top of VT-x; Hyper-V was able to boot 64-bit VM's just fine.  I will post a solution if I figure out why VirtualBox could not boot 64-bit guests.]

 

Hello,

 

Can anyone tell me if Intel VT-x is supported on the Thinkpad T440?  I know that it supports Intel VT-d, but the VT-x option is not an option I can enable in the BIOS (version 2.27).   Intel ARK shows that the Core i7 4600U supports VT-x, though: Intel ARK - i7 4600U

 

I'm a power user, so it's extremely frustrating I can't run 64-bit guest VM's. 

 

 

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353 Posts

03-29-2008

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Re: Intel VT-x on T440? (64-bit Virtual Machine Support)

2014-07-15, 14:38 PM

Unfortunately I fear you do not understand what VT-x is: VT-d vs VT-x.

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4 Posts

07-15-2014

United States

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Re: Intel VT-x on T440? (64-bit Virtual Machine Support)

2014-07-15, 14:54 PM

Ah, thank you for the link!  I didn't realize that VT-d builds on top of VT-x.  

 

Also, in my frustration last night I didn't try making a 64-bit VM with Hyper-V instead of just Virtualbox.  Sure enough, the VM booted in 64-bit mode with Hyper-V.  The problem must be that I can't have multiple Hypervisors running at the same time on the machine (Hyper-V must gain exclusive access to the subsystems that allow 64-bit operations). 

 

I'll continue to play around with my configuration (the most likely case will be disabling Hyper-V) and see if I can get VirtualBox to start 64-bit VM's. 

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4 Posts

07-15-2014

United States

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Re: Intel VT-x on T440? (64-bit Virtual Machine Support)

2014-07-15, 16:17 PM

Sure enough, it was Hyper-V preventing any other application from even seeing the Intel Virtualization enhancements:

 

Before diabling Hyper-V: 

WithHyperV.PNG

 

After disabling Hyper-V (using bcdedit /set hypervisorlaunchtype off):

WithoutHyperV.PNG

 

Virtualbox is now happily running a Server 2008 R2 instance. :)  Thanks for the help!  Hopefully this helps someone else that runs into the same thing.

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1 Posts

11-25-2014

Taiwan

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Re: Intel VT-x on T440? (64-bit Virtual Machine Support)

2014-11-25, 8:35 AM

wow~ it helps a lot. thanks! :smileyhappy:

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