Physical console
No login prompt is seen on a recent kernel
Many recent kernels use in built new-style Xen consoles which live in /dev/hvc0. Console output, including a getty, needs to run on this device.
Ubuntu 12.04
- Rename /etc/init/tty1.conf to /etc/init/hvc0.conf
- Change the contents so the getty runs on hvc0 instead of tty1