Serial console only works after reboot?

[Nate Lawson]

On Sat, 3 Jan 2004, M. Warner Losh wrote:
> 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?

Nope, checked everything from 1200 up to 38400, different garbage but
always garbage.  This is with -current as of 2003/12/30, no patches.

-Nate