amd64/170115: Serial boot broken in 9.0

[Paul Macdonald]

>Number:         170115
>Category:       amd64
>Synopsis:       Serial boot broken in 9.0
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jul 24 18:20:10 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Paul Macdonald
>Release:        9.0
>Organization:
IFDNRG
>Environment:
any ( install problem)
>Description:
Serial loader seems broken under 9.0

Using FreeBSD-8,3-RELEASE-amd64-bootonly.iso
adding to boot/loader.conf

bootconsole="comconsole"
comconsole_speed="57600"

Sufficient for serial install to work fine

Under 9.0 (All install isos) 
stage 3 loader never appears

>How-To-Repeat:
serial install under 9.0 (any iso) 
with loader.conf of:

bootconsole="comconsole"
comconsole_speed="57600"

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: