From owner-freebsd-stable@FreeBSD.ORG Sun Nov 29 03:45:20 2009 Return-Path: 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 A0096106568D for ; Sun, 29 Nov 2009 03:45:20 +0000 (UTC) (envelope-from karl@denninger.net) Received: from FS.denninger.net (wsip-70-169-168-7.pn.at.cox.net [70.169.168.7]) by mx1.freebsd.org (Postfix) with ESMTP id 576108FC20 for ; Sun, 29 Nov 2009 03:45:19 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by FS.denninger.net (8.14.3/8.13.1) with SMTP id nAT3jI9Y034741 for ; Sat, 28 Nov 2009 21:45:19 -0600 (CST) (envelope-from karl@denninger.net) Received: from [127.0.0.1] [192.168.1.40] by Spamblock-sys (LOCAL); Sat Nov 28 21:45:19 2009 Message-ID: <4B11EDDD.8060108@denninger.net> Date: Sat, 28 Nov 2009 21:43:25 -0600 From: Karl Denninger User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: Jeremy Chadwick References: <4B100262.6000900@denninger.net> <4B102059.6040003@denninger.net> <20091127190319.GA12437@icarus.home.lan> <4B102C41.6040205@denninger.net> In-Reply-To: <4B102C41.6040205@denninger.net> X-Enigmail-Version: 0.96.0 Content-Type: multipart/mixed; boundary="------------040903060702000202060503" X-Antivirus: avast! (VPS 091128-2, 11/28/2009), Outbound message X-Antivirus-Status: Clean X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org Subject: Re: PUC Serial I/O problem - copy of gnats-filed bug report (as discussed previously) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 29 Nov 2009 03:45:20 -0000 This is a multi-part message in MIME format. --------------040903060702000202060503 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Karl Denninger wrote: > Jeremy Chadwick wrote: > >> On Fri, Nov 27, 2009 at 12:54:17PM -0600, Karl Denninger wrote: >> >> >>> For what its worth, USB-based serial adapters also fail in the same way, >>> but faster (they have NEVER been reliable in this regard, and this >>> hasn't improved) >>> >>> >> There must be a regression of some kind, given that some FreeBSD >> developers have stated in the past that FTDI-based USB serial adapters >> work great: >> >> http://lists.freebsd.org/pipermail/freebsd-stable/2008-March/041615.html >> >> Original thread: >> >> http://lists.freebsd.org/pipermail/freebsd-stable/2008-March/041610.html >> >> > I don't know where "works great" has come from. Certainly not my > experience in "heavy" use. > > For non-modem-control heavy use, it works ok. I use an 8-port fanout on > 7.x to drive process control and it's stable. > > However, for heavy modem use (e.g. Hylafax) it has NEVER been stable - > although in 8.x it won't even manage to send ONE 10-page fax most of the > time, where under 7.x it would randomly fail in that use. Then again > the puc() driver based serial I/O was completely stable under 7.x and > now, with the "new architecture" it will get one or two jobs through it > before it blows up. > > -- Karl > FYI I downgraded back to 7.2-STABLE (it was a bit hairy but I got it to work after a small amount of screwing around) via sources and again the machine and those serial ports are 100% stable with the old driver infrastructure. The uart() infrastructure in 8.x has to be considered broken and unusable for modems at this point folks. I recognize that nobody flagged it until just before the release (I hadn't tried it until RC2, and thus didn't know) but this is a literal dagger in the heart of anyone who needs to put an actual modem on an 8.x box using the common cards out there, and I assume it will bite just as hard for things like a dial-in console as it will for a fax server. -- Karl --------------040903060702000202060503--