Sorry for the cross post but not response on fedora-xen. I still want to know if anybody else out there with a Dell has this problem before I BZ it.. Howdy, I was pleased to hear Dan B's announcement of an Xorg fix that would stop the high frequency random crashing under certain intel chipsets but here are my results on my Dell GX620. Booting up is fine, all the way to GDM. At this point, without logging in, I can SSH to the machine and check no application failures, and "xm list" shows my dom0 as expected. However immediately upon successful login the system reboots. I tried three times and have now fallen back to the non-xen kernel. I was trying with "selinux=0" if that's of use. There is nothing in the messages file to indicate what the problem might be, the messages file simply contains the next kernel boot message. >From the sounds of things debugging the intel / xorg issue was a nightmare, hopefully this gremlin will be easier to tame. But is anybody else finding this issue, or just my lucky self?