From owner-freebsd-stable Tue May 12 21:01:12 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id VAA03218 for freebsd-stable-outgoing; Tue, 12 May 1998 21:01:12 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from awfulhak.org (awfulhak.demon.co.uk [158.152.17.1]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id VAA03163 for ; Tue, 12 May 1998 21:00:30 -0700 (PDT) (envelope-from brian@Awfulhak.org) Received: from gate.lan.awfulhak.org (localhost [127.0.0.1]) by awfulhak.org (8.8.8/8.8.8) with ESMTP id AAA14771; Wed, 13 May 1998 00:44:32 +0100 (BST) (envelope-from brian@gate.lan.awfulhak.org) Message-Id: <199805122344.AAA14771@awfulhak.org> X-Mailer: exmh version 2.0.1 12/23/97 To: Andrew Short cc: stable@FreeBSD.ORG Subject: Re: PPP hard lock in 2.2.6 In-reply-to: Your message of "Tue, 12 May 1998 14:00:37 EDT." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 13 May 1998 00:44:31 +0100 From: Brian Somers Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk > On Tue, 12 May 1998, Forrest W. Christian wrote: > > > On Tue, 12 May 1998, Brian Somers wrote: > > > > > It's not a problem I've seen. It's *very* unlikely that ppp is > > > wedging the whole machine :-/ but possible I guess.... > > My (I use it at work, I am not lucky enough to OWN one!) Sun UltraSparc > has a feature that will arrest control from the OS by doing a Stop-A on > the keyboard. Obviously PC keyboards ado not have a stop key, but is > there anyway to emulate that behaviour without it being managed by the OS > so that IF the OS fails us (WHEN it fails us...once every decade or so) > that we can use that sequence? > > I have a gut feeling that "stop-a" is somehow embedded in the Sparc > hardware...but I have to ask. The closest in the PC world is the CTRL-ALT-ESC sequence that drops into ddb if you've got `options DDB' in your kernel config. This depends on the machine being alive enough to read the keyboard (which it isn't in this case as CAPS LOCK doesn't toggle the LED). Now if you talk to the likes of Bruce (bde@FreeBSD.org), he'll tell you how to open the box and short out lines 0 & 1 on the ISA bus, causing an NMI that will be caught by DDB (assuming the NMI interrupt vector hasn't been cr**ped all over) :-[] > ----------------------------------------------------------------------- > Andrew Short Colossians 3:23 > ashort@concentric.net http://www.concentric.net/~ashort/ > ----------------------------------------------------------------------- -- Brian , , Don't _EVER_ lose your sense of humour.... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message