Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755966AbZCBVei (ORCPT ); Mon, 2 Mar 2009 16:34:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752075AbZCBVea (ORCPT ); Mon, 2 Mar 2009 16:34:30 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:51359 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751743AbZCBVe3 (ORCPT ); Mon, 2 Mar 2009 16:34:29 -0500 Date: Mon, 2 Mar 2009 22:34:12 +0100 From: Ingo Molnar To: "Pallipadi, Venkatesh" Cc: Sitsofe Wheeler , "dri-devel@lists.sourceforge.net" , LKML , "Siddha, Suresh B" , Jesse Barnes Subject: Re: [TIP,regression,i915] /dev/dri/card0 is no longer present Message-ID: <20090302213412.GB25076@elte.hu> References: <20090301110455.GA18547@silver.sucs.org> <20090301113948.GA3602@elte.hu> <20090301134809.GA4753@silver.sucs.org> <1236020758.4586.76.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1236020758.4586.76.camel@localhost.localdomain> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1335 Lines: 33 * Pallipadi, Venkatesh wrote: > On Sun, 2009-03-01 at 05:48 -0800, Sitsofe Wheeler wrote: > > On Sun, Mar 01, 2009 at 12:39:48PM +0100, Ingo Molnar wrote: > > > > > > Thanks, i've reverted the commit for now. Could you please send > > > a 'dmesg' from the bootup with the failed driver? By all > > > likelyhood an ioremap failure causes a driver failure. > > > > > > > See below (drm says it initalized though...): > > > > [ 0.000000] Linux version 2.6.29-rc6-00006-g17581ad (@verona) (gcc version 4.2.4) #87 Sun Mar 1 13:42:28 GMT 2009 > > [ 0.000000] KERNEL supported cpus: > > [ 0.000000] Intel GenuineIntel > > [ 0.000000] PAT WC disabled due to known CPU erratum. > > Looks like PAT is getting disabled on this platform. Can you > send the output of /proc/cpuinfo please. Does this mean we failed an ioremap()? We still should not fail a device ioremap _ever_. We should just fall back to UC and be done with it. We may emit a warning if we consider it troublesome, but we should never ever break working drivers really. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/