kern/38716: usb discovery messages spill over /etc/rc and sysinst

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>Number:         38716
>Category:       kern
>Synopsis:       usb discovery messages spill over /etc/rc and sysinst
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 21 08:05:00 +0000 2008
>Originator:     Andrew Doran
>Release:        4.99.62
>Organization:
The NetBSD Project
>Environment:
x86
>Description:
Autoconf output for the keyboard on my workstation spills over output
from /etc/rc, and worse, over sysinst. It's a problem particularly as
it kills the welcome screen in sysinst, which is the first thing a new
user sees. It also looks really unprofessional.
>How-To-Repeat:
Have a system where USB devices take a bit longer to attach, or plug in
something just as the system starts /etc/rc
 
>Fix:
Some possible fixes:

- Maybe use config_pending to hold off starting init until the first
  round of device discovery is complete.

- Have sysinst play tricks and steal away the console device.

- Have sysinst run on ttyE1 if possible. While it's kind of a hack it
  would make kernel output a non-issue where it can be done.