On Wed, Apr 27, 2011 at 07:41:45AM -0500, Igor Serebryany wrote: You don't need to hack it :-) Just set LIBGUESTFS_QEMU environment variable to point to your installed KVM binary, eg: export LIBGUESTFS_QEMU=/usr/bin/kvm guestfish If that doesn't work, send us the complete output of libguestfs-test-tool. Note that KVM must have support for virtio-serial. It depends on which version of KVM that is; all recent versions of KVM should support it, but not older versions. You can find out by doing: $ kvm -device \? 2>&1 | grep virtio-serial name "virtserialport", bus virtio-serial-bus name "virtconsole", bus virtio-serial-bus name "virtio-serial-pci", bus PCI, alias "virtio-serial" As an aside, if you want to compile your own qemu or KVM from source then you need to use a qemu wrapper, which is slightly different and more complicated but is explained here: http://libguestfs.org/guestfs.3.html#qemu_wrappers Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 80 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora