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).

After I changed CPU from AMD to Intel, encounter the following error :
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).
The root cause is either the kvm-intel or kvm-amd module  has been loaded at boot time. To remove it   :
root@localhost:~# lsmod |grep kvm
kvm_intel              32832  0
kvm                   182683  1 kvm_intel
root@localhost:~# modprobe -r kvm_intel
No more message like the one above will be displayed.