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Date: Sat, 3 Jan 2004 18:51:56 -0800 (PST)
From: Nate Lawson <nate@root.org>
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Subject: Serial console only works after reboot?
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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?

sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A

-Nate