From owner-freebsd-current@FreeBSD.ORG Thu Jan 24 23:05:08 2008 Return-Path: Delivered-To: freebsd-current@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8DB0A16A539 for ; Thu, 24 Jan 2008 23:05:08 +0000 (UTC) (envelope-from scf@FreeBSD.org) Received: from mail.farley.org (farley.org [67.64.95.201]) by mx1.freebsd.org (Postfix) with ESMTP id 52A1913C467 for ; Thu, 24 Jan 2008 23:05:08 +0000 (UTC) (envelope-from scf@FreeBSD.org) Received: from thor.farley.org (thor.farley.org [192.168.1.5]) by mail.farley.org (8.14.1/8.14.1) with ESMTP id m0ON502v005773; Thu, 24 Jan 2008 17:05:00 -0600 (CST) (envelope-from scf@FreeBSD.org) Date: Thu, 24 Jan 2008 17:05:00 -0600 (CST) From: "Sean C. Farley" To: Baldur Gislason In-Reply-To: <20080124182710.GC14026@gremlin.foo.is> Message-ID: References: <20080124182710.GC14026@gremlin.foo.is> User-Agent: Alpine 1.00 (BSF 882 2007-12-20) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.3 X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on mail.farley.org Cc: freebsd-current@FreeBSD.org Subject: Re: 4GB RAM with an intel core 2 processor X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Jan 2008 23:05:08 -0000 On Thu, 24 Jan 2008, Baldur Gislason wrote: > I recently tried to upgrade my Dell workstation from 2GB to 4GB RAM. > It's an Optiplex 755 with an Intel Core 2 Quad Q6600 processor. I'm > running 7.0-RC1 When I install the 2 extra memory modules, the kernel > tells me on startup that it's ignoring 640MB memory above 4GB, leaving > me with a total of 3.375GB of accessible memory. However when X starts > (using a PCI-e Geforce with nvidia driver) the system reboots. > Now, I took a quick look at PAE and discovered that the PAE kernel is > not meant for anything but headless systems, most of the drivers > (including USB!) are out and no module support either. > > Do I have any options for using my 4GB of RAM and still retain USB and > the nvidia driver? The nvidia driver supposedly does not support PAE, and I know it does not support memory remapping (at least with FreeBSD). If you disable memory remapping in the BIOS, then the reboots should stop. I do not know if the Optiplex 755 has that option or not. Sean -- scf@FreeBSD.org