From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1RYknb-0001K2-VL for mharc-grub-devel@gnu.org; Thu, 08 Dec 2011 15:42:35 -0500 Received: from eggs.gnu.org ([140.186.70.92]:33484) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RYknY-0001Jl-Db for grub-devel@gnu.org; Thu, 08 Dec 2011 15:42:34 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RYknV-00077j-QW for grub-devel@gnu.org; Thu, 08 Dec 2011 15:42:32 -0500 Received: from mail-ey0-f169.google.com ([209.85.215.169]:38384) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RYknV-00077c-Kv for grub-devel@gnu.org; Thu, 08 Dec 2011 15:42:29 -0500 Received: by eaah1 with SMTP id h1so1539945eaa.0 for ; Thu, 08 Dec 2011 12:42:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=uxBGIM/4EDQ4PTrfiifLN3HKRfzSgjOJbu4cDz96t8k=; b=uQyNpNU2RIup8KJBll5YdBVrrpbp7aM3tXI3Y2WU9AP+kAXUmIAFjDWmBy4tX5lxAt GQYNOTG7taDGZwNuWkRoe0+74aXFROaY3KGE2pcZRhlwtuyuq3xwP6kWnAHElWcCC/mg VG/1CZCpZnRuIQDL7wYRLGC1OSwL8Htnv8h0M= Received: by 10.213.6.196 with SMTP id a4mr299841eba.83.1323376948332; Thu, 08 Dec 2011 12:42:28 -0800 (PST) Received: from debian.x201.phnet (75-234.197-178.cust.bluewin.ch. [178.197.234.75]) by mx.google.com with ESMTPS id 17sm21896108eej.3.2011.12.08.12.42.26 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 08 Dec 2011 12:42:27 -0800 (PST) Message-ID: <4EE12130.5080001@gmail.com> Date: Thu, 08 Dec 2011 21:42:24 +0100 From: =?UTF-8?B?VmxhZGltaXIgJ8+GLWNvZGVyL3BoY29kZXInIFNlcmJpbmVua28=?= User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111114 Icedove/3.1.16 MIME-Version: 1.0 To: The development of GNU GRUB Subject: Re: HP root-caues analysis for GRUB "Red screen of death" on DL120/DL360 G7 servers References: <6F28EE1C9AAED6468989841A3FB66CB44980B21C@Mail2.acmepacket.com> <4EE11B19.6000300@gmail.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 209.85.215.169 Cc: Iain Barker , Seth Goldberg X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: The development of GNU GRUB List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Dec 2011 20:42:34 -0000 On 08.12.2011 21:23, Seth Goldberg wrote: > > Is this Legacy GRUB they're talking about maybe? Can be. Then they use unsupported software to begin with. > > > --S > > Quoting Vladimir 'φ-coder/phcoder' Serbinenko, who wrote the following > on...: > >> >>> 1) Grub installs its own INT13 handler >>> 2) Near the end of the chain loading process, Grub loads an image of >>> the >> Linux kernel into memory which wipes out their Int13 handler. >>> 3) Right before grub transfers control to the kernel to boot, grub >>> makes a >> call to a function to turn off the floppy drive. >>> 4) The call to the floppy code then makes an Int13 call to the handler >> which has been overwritten by the kernel and thereby results in the >> red screen. >>> >> This text seems to be contradictory. INT13 handler is installed if >> drivemap is useful only with chainload. But then it mentions Linux >> loading. Also the call to stop floppy doesn't call BIOS: >> static inline void >> grub_stop_floppy (void) >> { >> grub_outb (0, GRUB_FLOPPY_REG_DIGITAL_OUTPUT); >> } >> May I see the configfile in question? >> Also GRUB does calculate the safe place based on memory layout, >> looking at code I see the problem that it's calculated before >> installing drivemap hook. While this should be fixed, I see no reason >> to use drivemap with Linux. >>> _end quoted text_ >>> >>> Regards, >>> Iain Barker - Platform Engineering, Acme Packet. >>> [yoshac@member.fsf.org] >>> >>> >>> _______________________________________________ >>> Grub-devel mailing list >>> Grub-devel@gnu.org >>> https://lists.gnu.org/mailman/listinfo/grub-devel >>> >> >> >> -- >> Regards >> Vladimir 'φ-coder/phcoder' Serbinenko >> >> >> _______________________________________________ >> Grub-devel mailing list >> Grub-devel@gnu.org >> https://lists.gnu.org/mailman/listinfo/grub-devel >> > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel -- Regards Vladimir 'φ-coder/phcoder' Serbinenko