hello, Now I am working on fedora6Xen,i.e. 2.6.20-1.2944.fc6xen .Several questions: 1. After I have installed the windowsXP, the XP OS of course needs to reboot, but then the WindowsXP is automatically closed. How can I restart it? And I use #virsh start , the domain will be running, but when I open it, just a black screen on the VM manager. 2. I also want to install the same Fedora6 on VM, but the installation will always hang. The fedora6 image on DVD must be OK as I have already installed it. 3. I must often boot the computer several times before I can see the login of Fedora OS. It changes often into a black screen state, dead. 4. I can not use #xm list, it says command not found. Any help or hint will be great!!! Thanks. Songtao