Guys I patched xl to have "reboot" and "shutdown" commands. I tested this with hvm domains with and and without pv drivers seems to work, of course the os level reboot and shutdown will only happen if there are pv drivers with the dom U. Also the libxl_domain_shutdown was not working for hvm guests without pv drivers, I did a small patch to that as well. (same way xend shutdown works used || instead of a && ). I would appreciate if someone can test this more with hvm and pv domains. Let me know what you think -- Gihan Munasinghe R&D Team Leader Flexiant Ltd. www.flexiant.com