This message, (XEN) Early fatal page fault at e008:ffff828c801da4a2 seems to be a result of Grub2 not supporting Xen kernels. More info here: http://lists.gnu.org/archive/html/grub-devel/2009-06/msg00219.html And a related thread here: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=505517 cheers, iMac