From owner-freebsd-bugs  Fri Nov  7 08:00:05 1997
Return-Path: <owner-freebsd-bugs>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id IAA06504
          for bugs-outgoing; Fri, 7 Nov 1997 08:00:05 -0800 (PST)
          (envelope-from owner-freebsd-bugs)
Received: (from gnats@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id IAA06485;
          Fri, 7 Nov 1997 08:00:02 -0800 (PST)
          (envelope-from gnats)
Resent-Date: Fri, 7 Nov 1997 08:00:02 -0800 (PST)
Resent-Message-Id: <199711071600.IAA06485@hub.freebsd.org>
Resent-From: gnats (GNATS Management)
Resent-To: freebsd-bugs
Resent-Reply-To: FreeBSD-gnats@FreeBSD.ORG, dgilbert@strike.velocet.ca
Received: from strike.velocet.ca (strike.velocet.ca [209.50.72.2])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id HAA06390
          for <FreeBSD-gnats-submit@freebsd.org>; Fri, 7 Nov 1997 07:58:10 -0800 (PST)
          (envelope-from dgilbert@strike.velocet.ca)
Received: (from dgilbert@localhost)
	by strike.velocet.ca (8.8.7/8.8.7) id KAA27027;
	Fri, 7 Nov 1997 10:59:27 -0500 (EST)
Message-Id: <199711071559.KAA27027@strike.velocet.ca>
Date: Fri, 7 Nov 1997 10:59:27 -0500 (EST)
From: David Gilbert <dgilbert@strike.velocet.ca>
Reply-To: dgilbert@strike.velocet.ca
To: FreeBSD-gnats-submit@FreeBSD.ORG
X-Send-Pr-Version: 3.2
Subject: kern/4968: Problems working with Courier I-Modem
Sender: owner-freebsd-bugs@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk


>Number:         4968
>Category:       kern
>Synopsis:       No flow control setting seems to make the system happy
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Nov  7 08:00:01 PST 1997
>Last-Modified:
>Originator:     David Gilbert
>Organization:
Velocet Communications
>Release:        FreeBSD 2.2.2-RELEASE i386
>Environment:

	FreeBSD 2.2.2-RELEASE on a Pentium w/ a Courier I-Modem.  Courier
acts like serial port (internal modem).  Telix works properly.

>Description:

	I have talked briefly about this problem once to one of the
developers.  Basically, if ctsrts is on cuaa2, the modem receives fine,
but cannot transmit large files (using ppp).  If ctsrts is off, sending
files is fine (this is counter intuitive, but my own feeble explaination
is that the card can control drain interupts), but receiving files will
only work for some period of time before the kernel starts spitting out:

Nov  7 03:16:24 wire1 /kernel: sio2: 54 more interrupt-level buffer overflows (total 788)
Nov  7 03:16:28 wire1 /kernel: sio2: 40 more interrupt-level buffer overflows (total 828)

	I do hate to drag you people into our own problems (esp after
the slight embarasment over the SCSI drive issue), but we've been
wrestling with this one for several months.

>How-To-Repeat:

	Connect Courier I-Modem to ISA bus, conffigure it for ppp,
send a big file (or recieve a big file, depending on ctsrts).

>Fix:
	
	

>Audit-Trail:
>Unformatted: