From owner-freebsd-current@FreeBSD.ORG Wed May 25 06:59:15 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 089F316A41C for ; Wed, 25 May 2005 06:59:15 +0000 (GMT) (envelope-from danny@cs.huji.ac.il) Received: from cs1.cs.huji.ac.il (cs1.cs.huji.ac.il [132.65.16.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id A6E0343D49 for ; Wed, 25 May 2005 06:59:14 +0000 (GMT) (envelope-from danny@cs.huji.ac.il) Received: from pampa.cs.huji.ac.il ([132.65.80.32]) by cs1.cs.huji.ac.il with esmtp id 1DaprF-0004z7-M4 for freebsd-current@freebsd.org; Wed, 25 May 2005 09:59:13 +0300 X-Mailer: exmh version 2.7.0 06/18/2004 with nmh-1.0.4 To: FreeBSD Current Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 25 May 2005 09:59:13 +0300 From: Danny Braniss Message-ID: Subject: serial hangs kernel X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 May 2005 06:59:15 -0000 i've been having some boxes hang solid (only power cycle will work) when trying to open ttyd0/cuaa0/cuad0. the message sio0: port may not be enabled gave me the clue, notice that the above is ambivalent. I enabled it in the bios, and now it's working ok, at least on an IBM-R51, i still have to check it on an IBM-T21 (that DOES have a serial port/outlet), and a Intel/IBM blade. so it seems, at first site, that if the sio hardware is on the MB, but sort of not enabled - because there is no connector -, (why the parallel port was kept and not the serial is beyond me), trying to open /dev/cuaa0 hangs the kernel. Q: in such case, shouldn't it not appear in /dev ? btw, this is with -stable & -current danny