VirtualBox

Ticket #12350 (closed defect: duplicate)

Opened 21 months ago

Last modified 8 weeks ago

Hardware Virtualisation support not detected if Hyper-V installed

Reported by: mot256 Owned by:
Priority: major Component: other
Version: VirtualBox 4.3.0 Keywords:
Cc: Guest type: Windows
Host type: Windows

Description

I get the following error (and yes I know this has been reported many times, but please read further): VT-x/AMD-V hardware acceleration is not available on your system. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.

The issue is that Virtualisation *is* enabled in my BIOS and I also made sure my BIOS is upgraded to the latest version. I also confirmed it with the Coreinfo.exe ( http://technet.microsoft.com/en-us/sysinternals/cc835722.aspx) tool. Here is the ouput of that tool:

Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
Intel64 Family 6 Model 42 Stepping 7, GenuineIntel
HYPERVISOR      *   Hypervisor is present
VMX             -   Supports Intel hardware-assisted virtualization
EPT             -   Supports Intel extended page tables (SLAT)

Here is the thing: I used VirtualBox on the same machine, but with Windows 7 and I could run exactly the same x64 guest images.

Attachments

VBox.log Download (79.6 KB) - added by mot256 21 months ago.
Log file
Coreinfo.txt Download (5.7 KB) - added by tuhinchakravorty 8 weeks ago.
VBox.2.log Download (53.8 KB) - added by tuhinchakravorty 8 weeks ago.

Change History

Changed 21 months ago by mot256

Log file

comment:1 Changed 21 months ago by mhanor

The output of Coreinfo confirms that this is not a VirtualBox issue. VMX is not available (the "minus" sign) and that a hypervisor is already present (the asterisk sign). We can assume it's not VirtualBox's hypervisor.
After enabling VT-x in the BIOS, shutdown the PC/laptop, if the BIOS doesn't do it for you. Do not use any form of standby/hibernation.

comment:2 Changed 21 months ago by mot256

I simply un-installed Hyper-V and it works again. I would like to change this to a suggestion that VirtualBox should please warn you that another virtualisation service/application is running. This will it so much clearer why x64 Guests would not start up.

Version 0, edited 21 months ago by mot256 (next)

comment:3 Changed 21 months ago by frank

  • Priority changed from blocker to major
  • Summary changed from x64 Hardware Virtualisation support not detected on Windows 8.1 to Hardware Virtualisation support not detected if Hyper-V installed

Changed 8 weeks ago by tuhinchakravorty

Changed 8 weeks ago by tuhinchakravorty

comment:4 follow-ups: ↓ 5 ↓ 6 Changed 8 weeks ago by tuhinchakravorty

Hi,

I am trying to install ESXi 5.1 in VirtualBox. But, I have got an error stating "hardware virtualization warning hardware virtualization is not a feature of the cpu or is not enabled in the bios". Please let me know if there anything wrong in my task. I have attached 2 files named as VBox.2.log and Coreinfo.txt.

comment:5 in reply to: ↑ 4 Changed 8 weeks ago by mot256

Replying to tuhinchakravorty:

Hi,

I am trying to install ESXi 5.1 in VirtualBox. But, I have got an error stating "hardware virtualization warning hardware virtualization is not a feature of the cpu or is not enabled in the bios". Please let me know if there anything wrong in my task. I have attached 2 files named as VBox.2.log and Coreinfo.txt.

You are trying to install a virtualisation technology within another virtual machine. Hell, are you trying to setup the Matrix here ...lol I guess the VirtualBox's BIOS does not expose the hardware virtualization of the physical CPU and that the ESXi OS now reports that the virtualised CPU (provided by VirualBox VM) does not support it. But I'm just guessing. Would love to know the educated answer though...

comment:6 in reply to: ↑ 4 Changed 8 weeks ago by ramshankar

Replying to tuhinchakravorty:

Hi,

I am trying to install ESXi 5.1 in VirtualBox. But, I have got an error stating "hardware virtualization warning hardware virtualization is not a feature of the cpu or is not enabled in the bios". Please let me know if there anything wrong in my task. I have attached 2 files named as VBox.2.log and Coreinfo.txt.

VirtualBox does not support nested hardware virtualization, so what you are trying to do will not work. The guest will not see any VT-x/AMD-V capabilities which is why you see that error.

comment:7 Changed 8 weeks ago by frank

  • Status changed from new to closed
  • Resolution set to duplicate

Closing this as duplicate. #4032 might cover that problem.

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