<snip>
On a different note, when I have the tty lines uncommented, the system
starts dumping garbage on the serial console and saying that getty is
respawning too quickly and needs to sleep for 5 minutes.
This is because they are trying to open tty1 -> tty6, if there is no
screen (either no graphics card or OpenBoot is working over serial) then
this device isn't valid - thus getty dies and init restarts it and so
on. Thankfully init pauses after a number of restarts. If you install
on a headless system the installer seems to automagically comment these
out.
Cheers,
- Martin