port-xen/40675: Xen 3.3: guest serial console not functional

[Christoph_Egger%gmx.de@localhost]

>Number:         40675
>Category:       port-xen
>Synopsis:       Xen 3.3: guest serial console not functional
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-xen-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 17 15:40:00 +0000 2009
>Originator:     Christoph Egger
>Release:        5.99.7
>Organization:
>Environment:
>Description:

When starting the first guest with a serial console configured,
then no output is visible.
ssh into the guest works fine.

The full problem description:
http://mail-index.netbsd.org/port-xen/2008/08/20/msg004155.html
>How-To-Repeat:

>Fix: