Hello everyone I do not know if it is correct address this mailing lists but I can not use libvirt. I run compile libvirt version 2.2.0 into environment lfs stable with qemu 2.7.0 and have not had any problems. The program when it starts not report any errors in the log, with activated debug level file. Only when you try to connect with the following command virsh -c qemu:///system remains hung without reporting any error either in the logs that screen. The command virsh -c test:///default list instead concludes on a regular basis. I attach the file libvirt.log and libvirt.conf Thank you Stefano Ricci