For Fedora 13 on the APC, the console on the usb/uart connection will ‘vanish’ on boot, after

..........
Starting sshd: [  OK  ]

To get it back, and allow login as root, add the following to /etc/securetty:

ttyS0

and modify /etc/sysconfig/init:

from
ACTIVE_CONSOLES=/dev/tty[1-6]
to
ACTIVE_CONSOLES="/dev/tty[1-6] dev/ttyS0"

To stop the (re)login prompt from appearing over the console boot messages, modify /etc/init/tty.conf:

and change
exec /sbin/mingetty $TTY
to
exec /sbin/mingetty --noclear $TTY

then reboot, and the console login prompt will appear..:

...........
Starting sshd: [  OK  ]
Starting vsftpd for vsftpd: [  OK  ]

Fedora release 13 (Goddard)
Kernel 2.6.32.59-apc on an armv6l (ttyS0)

rgapc01 login: