Missing serial port after enabling serial console in loader.conf

[Przemyslaw Frasunek]

> Hmm, that unknown device is your COM1.  Do you have a copy of your current 
> dmesg available?  I'm curious if sio0 failed to probe the UAR1 device and then 
> later attached to UAR2.

Sure, this is my non-verbose dmesg: http://www.frasunek.com/tmp/dmesg.txt

It's from 7.3-RELEASE, but on 7.4 I get the same behaviour.

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