Hi All, I just update one of my Fedora 14 domU to Fedora 16 and everything when ok in the update process. But once I did the first domU reboot than I got the Error: Boot loader didn't return any data! while virt-manager reports: Error starting domain: POST operation failed: xend_post: error from xen daemon: (xend.err "Boot loader didn't return any data!") details reports: raceback (most recent call last): File "/usr/share/virt-manager/virtManager/engine.py", line 589, in run_domain vm.startup() File "/usr/share/virt-manager/virtManager/domain.py", line 150, in startup self._backend.create() File "/usr/lib64/python2.6/site-packages/libvirt.py", line 333, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: POST operation failed: xend_post: error from xen daemon: (xend.err "Boot loader didn't return any data!") My thought is that since Fedora 16 comes with grub2, my current xen setup doesn't support it. I also did a backport of xen4.2.1 from F16, recompiling it from src.rpm but anything was really working. Does anyone can suggest something to solve this problem. Thanks in advance. Roberto Fichera. -- xen mailing list xen@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/xen