Hi Dan, With qemu-0.12.2-5.fc13.x86_64 in fedora, libvirt is generating a cmdline which qemu-kvm can't parse. XML is: <domain type='kvm'> <name>winxp_32</name> <uuid>3485e26d-c370-c0b0-32e2-a041a12f5cfc</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.11'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu'/> <source file='/mnt/devel/vms/disks/winxp_32.qcow2.img'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu'/> <source file='/mnt/devel/media/win_2003_64.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <disk type='file' device='cdrom'> <target dev='hdb' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='0' unit='1'/> </disk> <disk type='file' device='floppy'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/1.img'/> <target dev='fda' bus='fdc'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'/> <controller type='fdc' index='0'/> <interface type='network'> <mac address='52:54:00:5d:46:22'/> <source network='default'/> <target dev='vnet0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> <input type='tablet' bus='usb'/> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <sound model='es1370'/> <video> <model type='vga' vram='9216' heads='1'/> </video> </devices> </domain> The generated cmdline is: LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc-0.11 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name winxp_32 -uuid 3485e26d-c370-c0b0-32e2-a041a12f5cfc -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/winxp_32.monitor,server,nowait -mon chardev=monitor,mode=readline -localtime -boot c -drive file=/mnt/devel/vms/disks/winxp_32.qcow2.img,if=none,id=drive-ide0-0-0,boot=on -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive file=/mnt/devel/media/win_2003_64.iso,if=none,media=cdrom,id=drive-ide0-1-0 -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive if=none,media=cdrom,id=drive-ide0-0-1 -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -drive file=/var/lib/libvirt/images/1.img,if=none,id=drive-fdc0-0-0,format=raw -global isa-fdc,driveA=drive-fdc0-0-0 -device rtl8139,vlan=0,id=net0,mac=52:54:00:5d:46:22,bus=pci.0,addr=0x4 -net tap,fd=38,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -vga std -device ES1370,id=sound0,bus=pci.0,addr=0x5 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 can't parse: "isa-fdc,driveA=drive-fdc0-0-0" If I drop the floppy dev and controller, the guest boots, but a few warnings are printed. Not sure if any of this reflects qemu bugs or libvirt bugs: LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc-0.11 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name winxp_32 -uuid 3485e26d-c370-c0b0-32e2-a041a12f5cfc -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/winxp_32.monitor,server,nowait -mon chardev=monitor,mode=readline -localtime -boot c -drive file=/mnt/devel/vms/disks/winxp_32.qcow2.img,if=none,id=drive-ide0-0-0,boot=on -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive file=/mnt/devel/media/win_2003_64.iso,if=none,media=cdrom,id=drive-ide0-1-0 -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive if=none,media=cdrom,id=drive-ide0-0-1 -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -device rtl8139,vlan=0,id=net0,mac=52:54:00:5d:46:22,bus=pci.0,addr=0x4 -net tap,fd=37,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -vga std -device ES1370,id=sound0,bus=pci.0,addr=0x5 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 char device redirected to /dev/pts/2 Warning: vlan 0 with no nics Option 'ipv4': Use 'on' or 'off' Failed to parse "yes" for "dummy.ipv4" Thanks, Cole -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list