Failure to start kvm can also be caused by VirtualBox running on the host - watch out for dmesg like:
kvm: enabling virtualization on CPU3 failed kvm: enabling virtualization on CPU0 failed kvm: enabling virtualization on CPU2 failed kvm: enabling virtualization on CPU1 failed
to fix it: # /etc/init.d/virtualbox stop # rmmod rmmod vboxnetflt
and the KVM VMs should start from virt-manager like a charm
n.b. # grep libvirt /etc/group kvm:x:127:libvirt-qemu libvirtd:x:130:<yourusername>
Failure to start kvm can also be caused by VirtualBox running on the host - watch out for dmesg like:
kvm: enabling virtualization on CPU3 failed
kvm: enabling virtualization on CPU0 failed
kvm: enabling virtualization on CPU2 failed
kvm: enabling virtualization on CPU1 failed
to fix it: d/virtualbox stop
# /etc/init.
# rmmod rmmod vboxnetflt
and the KVM VMs should start from virt-manager like a charm
n.b. libvirt- qemu x:130:< yourusername>
# grep libvirt /etc/group
kvm:x:127:
libvirtd: