From owner-freebsd-stable Sun Feb 18 13:49:19 2001 Delivered-To: freebsd-stable@freebsd.org Received: from earth.backplane.com (earth-nat-cw.backplane.com [208.161.114.67]) by hub.freebsd.org (Postfix) with ESMTP id 1BF1F37B491 for ; Sun, 18 Feb 2001 13:49:16 -0800 (PST) Received: (from dillon@localhost) by earth.backplane.com (8.11.2/8.9.3) id f1ILnDo31955; Sun, 18 Feb 2001 13:49:13 -0800 (PST) (envelope-from dillon) Date: Sun, 18 Feb 2001 13:49:13 -0800 (PST) From: Matt Dillon Message-Id: <200102182149.f1ILnDo31955@earth.backplane.com> To: Mike Meyer Cc: stable@FreeBSD.ORG Subject: Re: Suggestions for diagnosing lockups References: <14991.58225.783986.487533@guru.mired.org> <200102181936.f1IJanm31380@earth.backplane.com> <14992.9931.334001.521780@guru.mired.org> <200102182008.f1IK87k31550@earth.backplane.com> <14992.11461.884930.102242@guru.mired.org> Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG :I'm looking for hints on how to do that. The first freeze - with X :left running - didn't respond to Control-Alt-Escape. That's why I :asked if X had known interactions with DDB. On further thought, it :might be a problem with stealing the console. : : http://www.mired.org/home/mwm/ You could compile up a kernel with the console configured on a serial port. If you have a second machine and a null-modem cable, or if you have an old serial terminal, that would be the best way. You would want to use ALT_BREAK_TO_DEBUGGER, CONSPEED=9600, and DDB kernel config options. You can also use the flags field for the serial ports to force the console to one of them (see /usr/src/sys/i386/conf/LINT, search for 'force this unit to be the console'), and there are other ways of doing it too. -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message