Serial console only works after reboot?

[M. Warner Losh]

In message: <20040103184934.V16815 at root.org>
            Nate Lawson <nate at root.org> writes:
: I have a laptop (IBM T23) and use sio0 as my console/gdb port.  One thing
: I noticed is if I power up the laptop and boot -h, I get garbage out the
: serial port.  However, if I boot fully and then just warm reboot, the
: serial console works fine.  I'm only using 9600 bps.  Ideas?

weird.  Is the garbage data at some different rate?

Warner