VT-x is being used by another hypervisor - on Linux 64 bit

[vg]

I see the below message when we start guest instance, I see similar posts for other than linux OS.
uploaded vbox logs


Failed to open a session for the virtual machine t.

VT-x is being used by another hypervisor. (VERR_VMX_IN_VMX_ROOT_MODE).

VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Console
Interface: IConsole {8ab7c520-2442-4b66-8d74-4ff1e195d2b6}

[mpack]

What is your question? Is the message and its instruction not already clear? VT-x is being used by another hypervisor.

[vg]

Hi,

Message is clear at least about VT-used by another user, what about the below message followed with VT-x used by another user, who is another user here, i logged in with only one user from which i was trying to start guest host.

VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Console
Interface: IConsole {8ab7c520-2442-4b66-8d74-4ff1e195d2b6}

[Perryg]

http://www.dedoimedo.com/computers/kvm-virtualbox.html

[vg]

Please close this thread,
rmmod kvm-intel ( works )

Thanks