From owner-freebsd-hackers Sat Jun 3 01:55:46 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id BAA17905 for hackers-outgoing; Sat, 3 Jun 1995 01:55:46 -0700 Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id BAA17889 for ; Sat, 3 Jun 1995 01:55:43 -0700 Received: from sax.sax.de by irz301.inf.tu-dresden.de with SMTP (5.67b+/DEC-Ultrix/4.3) id AA03578; Sat, 3 Jun 1995 10:55:41 +0200 Received: by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id KAA20807; Sat, 3 Jun 1995 10:55:40 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.6.11/8.6.9) id KAA16939; Sat, 3 Jun 1995 10:27:41 +0200 From: J Wunsch Message-Id: <199506030827.KAA16939@uriah.heep.sax.de> Subject: Re: hang problems To: james@miller.cs.uwm.edu (Jim Lowe) Date: Sat, 3 Jun 1995 10:27:41 +0200 (MET DST) Cc: hackers@FreeBSD.org In-Reply-To: <199505151832.NAA17968@miller.cs.uwm.edu> from "Jim Lowe" at May 15, 95 01:32:40 pm Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Content-Length: 718 Sender: hackers-owner@FreeBSD.org Precedence: bulk As Jim Lowe wrote: > > Every once in a while after I reboot my system, it hangs. I am not sure > what type of problem this is. Is there a method to obtain a core dump or > drop the system into the kernel debugger after/during a system hang? Nope, the system is no longer running at this stage, it attempted to reset the CPU (either way, i think it first tries the keyboard controller reset, and then a CPU shutdown [wiping the page table directory, and flush the TLB]). If the system is stuck at this point, only a hardware reset will help. Rod, ain't this your baby? -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ Never trust an operating system you don't have sources for. ;-)