[Bug 1057024] Re: kvm kernel module always loaded, without setting /dev/kvm permissions

[Bernd Rothert]

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>

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https://bugs.launchpad.net/bugs/1057024

Title:
  kvm kernel module always loaded, without setting /dev/kvm permissions

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