VMX flag missing in guest Linux OS

[raghu2383]

I am new to virtualbox, so it may be that I dont know all its capabilities and limitations.

I have a Ubuntu10.04 guest OS running on top of virtualbox 4. I want to start a guest OS on it. Horrible as it may sound, I am trying to build some virtualization feature for my thesis and I dont want to code on the Host OS as I have had to constantly reboot and it takes away the ability to have remote access.

On booting the guest OS I dont see a VMX flag in cat /proc/cpuinfo, so due to this, I cannot boot a guest OS inside the guest OS to test any code I may write.

I have VMX on the host OS. I checked it, and I also enabled VT-x in the Virtualbox settings so its not that my hardware does not support VT

Am I missing anything? Is this normally not possible?

[Perryg]

Yes you are missing that you can't run a virtualizer inside another virtualizer (at least with VirtualBox and many more)
Some say that they have done so but it is not supported. http://forums.virtualbox.org/viewtopic.php?f=1&t=20589

[raghu2383]

Ok, thanks.