[Buildroot] bootm - "Starting kernel"

[Brendan Heading]

> FYI, I unplugged the Ethernet cable and did the steps again. This time the
> same “tty: bad speedgetty” message is still repeated.

Nothing to do with ethernet - it sounds like it's trying to start
getty but there's an issue with the speeds. The error message comes
from loginutils/getty.c inside busybox.

Did you mess around with /etc/inittab, or did you leave it at the defaults ?

Brendan