From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758136AbcATUBx (ORCPT ); Wed, 20 Jan 2016 15:01:53 -0500 Received: from mail-oi0-f49.google.com ([209.85.218.49]:33182 "EHLO mail-oi0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752534AbcATUBs (ORCPT ); Wed, 20 Jan 2016 15:01:48 -0500 To: Dan Williams , LKML From: Larry Finger Subject: Boot problem on PPC with 4.4-git - Bisected to commit 21266be Message-ID: <569FE7A9.7090902@lwfinger.net> Date: Wed, 20 Jan 2016 14:01:45 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org My PowerBook G4 Aluminum with a 32-bit PPC processor fails to boot for the 4.4-git series. The problem was bisected to commit 21266be. It took a while to figure out why a commit that only rearranges the Kconfig files could cause the problem. The answer came when I read the commit message for 90a545e98126 and saw that "Recompiling with CONFIG_IO_STRICT_DEVMEM=n" might be necessary. After I made that change, the system boots. If it is the graphics hardware driver at fault, the VGA controller is listed as an ATI RV350 [Mobility Radeon 9600 M10] with PCI ID 1002:4350. It uses radeon as the driver. I'm not sure if this is a bug in the configuration, but I know that selecting the default answer to all the new configuration parameters leaves me with a machine that is unbootable. Larry