I recently installed Ubuntu and got an error that the kvm and kvm-amd modules are blocking VirtualBox from running VMs.
Failed to open a session for the virtual machine xp efendi.
AMD-V is being used by another hypervisor. (VERR_SVM_IN_USE).
VirtualBox can't enable the AMD-V extension. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_SVM_IN_USE).Just remove these modules to quickly fix the problem.
sudo rmmod kvm_amd
sudo rmmod kvm
A restart will load the modules again. To make it permanent, create the file /etc/modprobe.d/blacklist-kvm.conf and change its content as shown below.
blacklist kvm-amd
blacklist kvm
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