Hi, The subject pretty much says it all, Slackware 7.0, Linux 2.2.13 kernel and ifconfig 1.39 (net-tools 1.52). qemu-kvm 0.12.5 is from Debian Lenny backports, with the backports kernel (2.6.32). qemu-kvm 0.11.0 is built from source with the Lenny stable kernel 2.6.26. Both hosts have X3350 CPUs. This works on 0.11.0 under libvirt 0.7.6: /usr/bin/kvm -S -M pc-0.11 -cpu qemu32 -enable-kvm -m 256 -smp 1 -name johnsbox -uuid 8632a9c2-f579-4a8f-b355-26193e337471 -monitor unix:/var/lib/libvirt/qemu/johnsbox.monitor,server,nowait -boot a -drive file=/dev/mapper/apparel-johnsbox,if=ide,bus=0,unit=0,cache=none -drive if=ide,media=cdrom,bus=1,unit=0 -drive file=/var/lib/libvirt/images/johnsbox-floppy.img,if=floppy,unit=0 -net nic,macaddr=00:0c:29:f2:cf:ff,vlan=0,model=ne2k_pci,name=net0 -net tap,fd=30,vlan=0,name=hostnet0 -serial none -parallel none -usb -vnc 127.0.0.1:0 -vga cirrus -balloon virtio This hangs on 0.12.5 (and libvirt 0.8.1) in ifconfig while configuring eth0: /usr/bin/kvm -S -M pc-0.12 -cpu qemu32 -enable-kvm -m 256 -smp 1,sockets=1,cores=1,threads=1 -name johnsbox -uuid 815ff1ac-47df-596c-a394-7173d9b4633f -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/johnsbox.monitor,server,nowait -mon chardev=monitor,mode=readline -rtc base=utc -boot a -drive file=/dev/collective/johnsbox,if=none,id=drive-ide0-0-0,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive file=/var/lib/libvirt/images/johnsbox-floppy.img,if=none,id=drive-fdc0-0-0,readonly=on,format=raw -global isa-fdc.driveA=drive-fdc0-0-0 -device ne2k_pci,vlan=0,id=net0,mac=00:0c:29:f2:cf:ff,bus=pci.0,addr=0x4 -net tap,fd=26,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -vnc 127.0.0.1:9 -k en-us -vga std -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 Same again (trying to get the command line similar to what worked): /usr/bin/kvm -M pc-0.11 -cpu qemu32 -enable-kvm -m 256 -smp 1 -boot a -drive file=/dev/collective/johnsbox,if=ide,bus=0,unit=0,cache=none -drive if=ide,media=cdrom,bus=1,unit=0 -drive file=/var/lib/libvirt/images/johnsbox-floppy.img,if=floppy,unit=0 -net nic,macaddr=00:0c:29:f2:cf:ff,vlan=0,model=ne2k_pci,name=net0 -serial none -parallel none -usb -vnc 127.0.0.1:9 -vga cirrus -balloon virtio Hoping I haven't missed anything obvious ... Without a virtual NIC, the guest boots up ok and appears to be fine. The guest's boot messages shows eth0 is getting IRQ11 with both 0.11.0 and 0.12.5, however under 0.12.5 eth0 doesn't show up in /proc/interrupts. Any ideas? I'm not quite in a position to try 0.13.0, unfortunately. Thanks, Mark. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html