Hi all I have faced this issue already and the solution was to go back to a old version of qemu-kvm and/or libvirt and things start falling into place but this time I would want to solve this. I have used these versions as per the o/p of the commands below. To jumpstart a new machine which is libvirt capable, it always is a hastle to find out which of the version combination of libvirt,qemu-kvm will work. Just by picking the latest of the two versions does not help and ends up not supporting hvm at all $ sudo virsh capabilities <capabilities> <host> <uuid>34373030-3635-435a-4a32-313230485156</uuid> <cpu> <arch>x86_64</arch> <model>Westmere</model> <vendor>Intel</vendor> <topology sockets='2' cores='4' threads='2'/> <feature name='rdtscp'/> <feature name='pdpe1gb'/> <feature name='dca'/> <feature name='pdcm'/> <feature name='xtpr'/> <feature name='tm2'/> <feature name='est'/> <feature name='smx'/> <feature name='vmx'/> <feature name='ds_cpl'/> <feature name='monitor'/> <feature name='dtes64'/> <feature name='pclmuldq'/> <feature name='pbe'/> <feature name='tm'/> <feature name='ht'/> <feature name='ss'/> <feature name='acpi'/> <feature name='ds'/> <feature name='vme'/> </cpu> <power_management/> <migration_features> <live/> <uri_transports> <uri_transport>tcp</uri_transport> </uri_transports> </migration_features> </host> </capabilities> $ virsh --version 0.9.11 $ qemu-system-x86_64 --version QEMU emulator version 1.0,1 (qemu-kvm-1.0.1), Copyright (c) 2003-2008 Fabrice Bellard $ sudo virsh uri qemu:///system $ sudo virsh version Compiled against library: libvir 0.9.11 Using library: libvir 0.9.11 Using API: QEMU 0.9.11 error: failed to get the hypervisor version error: internal error Cannot find suitable emulator for x86_64 $ which kvm /usr/local/bin/kvm Can someone tell me, please, what is the version of qemu-kvm which will work well with the latest libvirt 0.9.11 ? since clearly the latest versions of qemu-kvm and libvirt are not compatible fully (atleast not hvm). Even better if this is documented somewhere visible so that a lot of time can be saved in iterating through the versions of qemu-kvm to find out which one will work. -- Bhasker C V Secure Mails: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4D05FEEC54E47413