VIRTUAL BOX ERROR IN UBUNTU=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).

salam,

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).

what i do (using ubuntu):

if use intel cpu:
sudo modprobe -r kvm-intel

if amd cpu .. change intel ke amd

done