I am in RHEL 6.0 and the libvirt is libvirt-0.8.1. In my xml file the graphics defination is : <graphics type='spice' listen='0.0.0.0' port=5930 passwd='abc' /> And I use virsh create to create my vm, but it said: error : internal error Only VNC graphics are supported. Then I change 'passwd' to 'password'. Though it could work, I use ps aux | grep kvm, it didn't have password in kvm command, only with disable-ticketing(which is default value). Does this say  libvirt-0.8.1 can't support spice passwd? Do we must use the default value 'disable-ticketing'? Thank you.