From owner-freebsd-current Thu Apr 4 12:53:14 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id MAA29838 for current-outgoing; Thu, 4 Apr 1996 12:53:14 -0800 (PST) Received: from who.cdrom.com (who.cdrom.com [204.216.27.3]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id MAA29832 for ; Thu, 4 Apr 1996 12:53:12 -0800 (PST) Received: from GndRsh.aac.dev.com (GndRsh.aac.dev.com [198.145.92.241]) by who.cdrom.com (8.6.12/8.6.11) with ESMTP id MAA27105 for ; Thu, 4 Apr 1996 12:52:51 -0800 Received: (from rgrimes@localhost) by GndRsh.aac.dev.com (8.6.12/8.6.12) id MAA07212; Thu, 4 Apr 1996 12:48:33 -0800 From: "Rodney W. Grimes" Message-Id: <199604042048.MAA07212@GndRsh.aac.dev.com> Subject: Re: tty-level buffer overflows - what to do? To: root@deadline.snafu.de (Andreas S. Wetzel) Date: Thu, 4 Apr 1996 12:48:33 -0800 (PST) Cc: nate@sri.MT.net, jgreco@brasil.moneng.mei.com, current@FreeBSD.org In-Reply-To: from "Andreas S. Wetzel" at "Apr 4, 96 09:27:26 pm" X-Mailer: ELM [version 2.4ME+ PL11 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-current@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk > Hi! > --- > > Nate Williams writes: > > ] > But another problem is still going on on that machine. During boot there > ] > are several occurences of "stray irq 7" messages until syslog says it would > ] > not log them anymore. I have no idea where this stray irq's should happen. > ] > Physically there is no adaptor card installed which could ever generate a > ] > IRQ 7 ? Possible that this has to do with the other thing? > ] > ] This is a pretty good indication that something is mis-confugred. IRQ 7 > ] is the 'junk' interrupt, which means it gets all of the interrupts not > ] otherwise assigned to a particular piece of hardware. Something is > ] generating interrupts on your system bogusly and you need to find out > ] what. > > That means the interrupt that happens is not guaranteed to be IRQ 7 but > maybe any other unassigned interrupt? > > The only cards I have installed in this machine are the following: > > IDE/FDC controller card (without any other ports etc) Many of these are norious for glitching IRQ lines... > Multi I/O card with COM1 COM2 LPT(completely disabled including IRQ) and > Gameport (also disabled) > > Dual I/O card with COM3 and COM4 > > standard ET4000 video board And I bet you a $1.00 this puppy is generating IRQ2/9 and causing you grief as a conflict with sio2... > Ethernet adaptor (ISA 16 bit software configurable) These too... > ---- > > The kernel seems to find all those devices: ... > sio2 at 0x3e8-0x3ef irq 9 on isa > sio2: type 16550A Check your ET4000 for an IRQ jumper, if it does not have one check the connector on the board to see if a trace is connected to the IRQ2 signal (pin B4). -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD