From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jack Mitchell Subject: New motherboard not detecting all memory Date: Sun, 30 Jun 2013 10:23:56 +0100 Message-ID: <51CFF92C.8090404@communistcode.co.uk> Reply-To: ml@communistcode.co.uk Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from eumx.net ([91.82.101.43]:46421 "EHLO owm.eumx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750869Ab3F3J6T (ORCPT ); Sun, 30 Jun 2013 05:58:19 -0400 Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org I recently bought a new AMD FM2 motherboard[1] and coupled it with an AMD A4 APU. I put 2x2GB sticks of RAM in the board, and the UEFI bios detects both sticks and reports 4GB. Now, when I boot into a fresh install of Linux [2] only 1501MB is reported as available. I was told this may be an ACPI problem, I have updated the motherboard to the latest BIOS revision which works. Could anyone shed any light on this, or where I should make a start in helping to debug the problem? Kind Regards, Jack. [1] http://www.gigabyte.com/products/product-page.aspx?pid=4383&dl=#ov [2] Linux mediaserver 3.9.7-1-ARCH #1 SMP PREEMPT Thu Jun 20 22:45:32 CEST 2013 x86_64 GNU/Linux -- Jack Mitchell (jack@embed.me.uk) Embedded Systems Engineer http://www.embed.me.uk --