Hello: I did more tests, but I don't find the problem. this is a debug I've got setting LIBVIRT_DEBUG=1, I'd appreciate any help. Regards. Marcela. <div class="gmail_quote"> 2011/4/4 Marcela Castro León <<a href="mailto:mcastrol@gmail.com" target="_blank">mcastrol@gmail.com</a>> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hello I'm having problem using migration. I'm working on ubuntu 10.4 and this versions of libvirt and virsh: virsh # version Compiled against library: libvir 0.7.5 Using library: libvir 0.7.5 Using API: QEMU 0.7.5 Running hypervisor: QEMU 0.12.3 This is the error. <div><div style="margin-left: 40px;">virsh # migrate scompi1 qemu+ssh://rionegro/system error: Unknown failure </div></div> This is the log on the destination, that show that there is no communication problem, but it has a problem starting the guest on destination. radic@rionegro:~$ sudo cat /var/log/libvirt/qemu/scompi1.log [sudo] password for radic: LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -S -M pc-0.12 -enable-kvm -m 4096 -smp 4 -name scompi1 -uuid 355123af-b683-9fa6-ca31-10506c9ab9da -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/scompi1.monitor,server,nowait -monitor chardev:monitor -boot c -drive file=/home/radic/mvdata/imagenes/scompi1.img,if=ide,index=0,boot=on,format=raw -drive if=ide,media=cdrom,index=2,format=raw -net nic,macaddr=52:54:00:05:d1:2a,vlan=0,model=virtio,name=virtio.0 -net tap,fd=33,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0 -parallel none -usb -vnc <a href="http://127.0.0.1:0" target="_blank">127.0.0.1:0</a> -vga cirrus -incoming tcp:<a href="http://0.0.0.0:49153" target="_blank">0.0.0.0:49153</a> <div> char device redirected to /dev/pts/1 </div>LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -S -M pc-0.12 -enable-kvm -m 4096 -smp 4 -name scompi1 -uuid 355123af-b683-9fa6-ca31-10506c9ab9da -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/scompi1.monitor,server,nowait -monitor chardev:monitor -boot c -drive file=/home/radic/mvdata/imagenes/scompi1.img,if=ide,index=0,boot=on,format=raw -drive if=ide,media=cdrom,index=2,format=raw -net nic,macaddr=52:54:00:05:d1:2a,vlan=0,model=virtio,name=virtio.0 -net tap,fd=33,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0 -parallel none -usb -vnc <a href="http://127.0.0.1:0" target="_blank">127.0.0.1:0</a> -vga cirrus -incoming tcp:<a href="http://0.0.0.0:49154" target="_blank">0.0.0.0:49154</a> char device redirected to /dev/pts/2 LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -S -M pc-0.12 -enable-kvm -m 4096 -smp 4 -name scompi1 -uuid 355123af-b683-9fa6-ca31-10506c9ab9da -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/scompi1.monitor,server,nowait -monitor chardev:monitor -boot c -drive file=/home/radic/mvdata/imagenes/scompi1.img,if=ide,index=0,boot=on,format=raw -drive if=ide,media=cdrom,index=2,format=raw -net nic,macaddr=52:54:00:05:d1:2a,vlan=0,model=virtio,name=virtio.0 -net tap,fd=33,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0 -parallel none -usb -vnc <a href="http://127.0.0.1:0" target="_blank">127.0.0.1:0</a> -vga cirrus -incoming tcp:<a href="http://0.0.0.0:49155" target="_blank">0.0.0.0:49155</a> char device redirected to /dev/pts/2 I'm attaching the xml of the scompi1 that i'm trying to migrate. I'd apprciate a lot any help. Marcela </blockquote></div>