I've been having this issue since I installed FC4. I was hoping a couple of yum upgrades would have fixed it but nope :( Still having the issue with 2.6.11-1.1319_FC4. Whenever I reboot a domain it stops at "Restarting system". It'll sit there until in another window I do an 'xm list' at which point the domain will reboot, almost like xend is waiting for xm to reap some info. I have restart set to onreboot. Any clues as to what I'm doing wrong? Thanks Tony