From owner-freebsd-stable@FreeBSD.ORG  Fri Nov 20 08:11:01 2009
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6FE8C106566C
	for <freebsd-stable@freebsd.org>; Fri, 20 Nov 2009 08:11:01 +0000 (UTC)
	(envelope-from perryh@pluto.rain.com)
Received: from agora.rdrop.com (unknown [IPv6:2607:f678:1010::34])
	by mx1.freebsd.org (Postfix) with ESMTP id 498FD8FC1F
	for <freebsd-stable@freebsd.org>; Fri, 20 Nov 2009 08:11:01 +0000 (UTC)
Received: from agora.rdrop.com (66@localhost [127.0.0.1])
	by agora.rdrop.com (8.13.1/8.12.7) with ESMTP id nAK8AtXv001911
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT);
	Fri, 20 Nov 2009 00:10:58 -0800 (PST)
	(envelope-from perryh@pluto.rain.com)
Received: (from uucp@localhost)
	by agora.rdrop.com (8.13.1/8.12.9/Submit) with UUCP id nAK8AtLj001910; 
	Fri, 20 Nov 2009 00:10:55 -0800 (PST)
Received: from fbsd61 by pluto.rain.com (4.1/SMI-4.1-pluto-M2060407)
	id AA09656; Fri, 20 Nov 09 00:10:27 PST
Date: Fri, 20 Nov 2009 00:10:48 -0800
From: perryh@pluto.rain.com
To: karl@denninger.net
Message-Id: <4b064f08.QD1V6fZm4C5kf4Qb%perryh@pluto.rain.com>
References: <4B054DCC.6020701@denninger.net>
	<200911191357.nAJDvd3X095748@lava.sentex.ca>
	<4B054F6D.70300@denninger.net>
In-Reply-To: <4B054F6D.70300@denninger.net>
User-Agent: nail 11.25 7/29/05
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: freebsd-stable@freebsd.org
Subject: Re: V8.x-PRE2 Serious PUC problem - Heads Up!
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 20 Nov 2009 08:11:01 -0000

Karl Denninger <karl@denninger.net> wrote:
> ... the uart driver is BROKEN.
>
> It simply locks up on the port after some period of time,
> returning nothing.  I have found no way to reset the port
> other than a reboot either ...

Welcome to the distant past.  I'll be interested to see what
the root cause turns out to be.

I've seen the same symptoms on:

* A Sun-3/50 running SunOS 4.1.1_U1, using ttyb;

* A Sun Ultra 2 running (IIRC) Solaris 2.5,
  using an Aurora multi-port S-Bus card;

* A Sun Ultra 10, using an Aurora multi-port PCI card.

The Suns were using Aurora drivers.  I was never able to get one of
those systems' ttya or ttyb (using Sun drivers, of course) to hang
that way.