To view serial output, connect the null modem cable to the dock and connect
the other end via the USB serial adapter, to your other machine.
On that other machine, there are several ways to monitor serial output. The
way I use is:
sudo screen /dev/ttyUSB0 115200
(if you don't have GNU Screen: sudo apt-get install screen)
The SeaBIOS payload is redundanty, strictly speaking. It will not be included
in later updates. (instead, a SYSLINUX parser from the latest GRUB will be
included, which makes booting ISO's much easier).
