Hi experts, When I start a VM using "virsh create vm.xml", I'm not able to connect to the vmchannel from host. The process libvirtd is running as root (modified qemu.conf to set user/group to root) already. The connect just hangs there even after the guest VM is up and running. However, if I start the VM using kvm directly (with same arguments as libvirtd in `ps auxwww`), the connect to vmchannel goes though after the guest VM is up and running. The problem is observed on ubuntu 12.10 (libvirt 0.9.13), but not ubuntu 12.04 (libvirt 0.9.8). Anyone knows why is this and how to fix it? Any suggestion is appreciated. ubuntu 12.10: Linux linux-01 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ubuntu 12.04: Linux linux-06 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:52:48 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Content of vm.xml: <domain type="kvm"> <uuid>c548c477-af6f-4aee-9e7d-987d6620aa27</uuid> <name>instance-00</name> <memory>262144</memory> <vcpu>1</vcpu> <os> <type>hvm</type> <boot dev="hd"/> </os> <features> <acpi/> </features> <clock offset="utc"> <timer name="pit" tickpolicy="delay"/> <timer name="rtc" tickpolicy="catchup"/> </clock> <devices> <disk type="file" device="disk"> <driver name="qemu" type="qcow2" cache="none"/> <source file="/home/user/project/kvm/instance-00/disk"/> <target bus="virtio" dev="vda"/> </disk> <serial type="file"> <source path="/home/user/project/kvm/instance-00/console.log"/> </serial> <serial type="pty"/> <channel type="unix"> <source path="/home/user/project/kvm/instance-00/vmchannel.sock" mode="bind"/> <target type="virtio" name="org.qemu.guest_agent.0"/> </channel> <graphics type="vnc" port="5900" autoport="no" keymap="en-us" listen="127.0.0.1"/> </devices> </domain>