Quoting Manuel Kasper <mk at neon1 dot net>:
> Unfortunately, with FreeBSD 6.x, the "auto-detection" (i.e. have the
> kernel use whatever serial port speed was set by the BIOS) doesn't work
> as in 4.x anymore.
OK, that's an argument I can live with. I just disliked the idea of
moving to a "non-standard" speed in the BIOS when it's not necessary.
But if the circumstances require it, it's OK.
Thanks to everyone for their help and their replies!