From owner-freebsd-hackers Fri May 31 14:37:30 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by hub.freebsd.org (Postfix) with ESMTP id 357CB37B405; Fri, 31 May 2002 14:37:17 -0700 (PDT) Received: (from dan@localhost) by dan.emsphone.com (8.12.2/8.12.3) id g4VLbGua069870; Fri, 31 May 2002 16:37:16 -0500 (CDT) (envelope-from dan) Date: Fri, 31 May 2002 16:37:16 -0500 From: Dan Nelson To: Ruslan Ermilov Cc: hackers@FreeBSD.ORG Subject: Re: dmesg buffer preserved between reboots Message-ID: <20020531213716.GD58285@dan.emsphone.com> References: <20020531210430.GA5725@sunbay.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20020531210430.GA5725@sunbay.com> User-Agent: Mutt/1.3.99i X-OS: FreeBSD 5.0-CURRENT X-message-flag: Outlook Error Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In the last episode (Jun 01), Ruslan Ermilov said: > One of my remote i386 machines preserves the dmesg buffer between > reboots, and others not. What features cause this buffer to be > preserved? I saw this on Alphas, and thought that this was caused If your BIOS zeros out memory as part of a warmboot, you'll lose the dmesg buffer. I've got docked laptops that don't seem to ever zero the data, even on a power cycle. -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message