Hello david do you have the same version of qemu, and even the same patch-level. Probably not, when you use precompiled binaries. Try to build the package yourself on both systems, it's not difficult to do. Regards Tom So in summary, everything works perfectly on two different Ubuntu 7.10 boxes > (one single-core laptop, one dual-core desktop), but doesn't work on the > quad-core Fedora Core 4 box. In all cases, I'm using the exact same qcow2 > file, and starting with the exact same command line:** > >