Subject: kern/10129: wscons loses when console is serial
To: None <>
From: John Hawkinson <>
List: netbsd-bugs
Date: 05/16/2000 11:09:25
>Number:         10129
>Category:       kern
>Synopsis:       wscons loses when console is serial
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 16 11:10:00 PDT 2000
>Originator:     John Hawkinson
>Release:        -current of 15 May 2000

System: NetBSD 1.4Y NetBSD 1.4Y (ZORKMID-$Revision: 1.5 $) #88: Mon May 15 19:31:34 EDT 2000 i386

	After booting on a serial console, wscons-based displays fail
catastrophically. Output to /dev/ttyE* is displayed, however no input
can be read. Keystrokes can be read from /dev/wskbd0, however.

Consoles cannot be switched via ctrl-alt-fN, nor by calling
wsdisplay_switch() (fails because sc->sc_displaydv has never been

Most poigently, observe a friendly "login: " prompt that accepts
no input and echos no characters.

This didn't occur under 1.4.2.

	Boot a serial console. Try to use the physical console. Be stymied.

	it appears from preliminary code inspection that much of the critical
wscons setup only happens if the console is actually on wscons.
I don't really understand what the theory is here, and the documentation
is sparse-to-nonexistant...