I want to use QEMU+KVM on Ubuntu 11.10 Oneiric but
virt-manager warns that KVM is not loaded and performance will suffer.
The problem may depend on the fact that
sudo modprobe kvm-amd
fails with error
FATAL: Error inserting kvm_amd (/lib/modules/3.0.0-13-generic/kernel/arch/x86/kvm/kvm-amd.ko): Operation not supported
sudo modprobe kvm
succeeds without warnings. What is wrong?