I started out with a fresh install of Ubuntu 14.04 server set up on a 10GB LVM partition. The only other thing I did was to then install the xen-hypervisor:

sudo apt-get install xen-hypervisor-amd64

I double checked that my hardware could support it (MSI Z87I motherboard and Intel i5-4570S cpu) and that I had virtualization set in the BIOS. I also double checked that GRUB defaults to boot into xen and that the xen toolchain is set to xl (not that that would likely cause my problem).

However, my system enters an endless cycle of booting up and rebooting until I tell GRUB to boot into regular Ubuntu. Here are the only things that show up whenever it tries booting into xen:

Loading Xen 4.4-amd64 ...

WARNING: no console will be available to the OS

Loading Linux 3.13.0-24-generic ...

Loading initial ramdisk ...

And then it reboots the system. Is there any error logs to check or any other boot parameters to try (the parameters are still set to the default)? Is it related to the above WARNING?

Edit: I gave up since there was nothing to go on and ended up dual-booting Windows and Ubuntu. I'd be willing to re-install on another partition if anyone has any ideas however.