From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753827AbZFEUBs (ORCPT ); Fri, 5 Jun 2009 16:01:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751270AbZFEUBl (ORCPT ); Fri, 5 Jun 2009 16:01:41 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:45294 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751018AbZFEUBk (ORCPT ); Fri, 5 Jun 2009 16:01:40 -0400 Date: Fri, 5 Jun 2009 13:00:33 -0700 From: Andrew Morton To: Pekka Enberg Cc: jbarnes@virtuousgeek.org, eric@anholt.net, intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, stable@kernel.org Subject: Re: Intel 915GM MCHBAR bug Message-Id: <20090605130033.5ff3d0b5.akpm@linux-foundation.org> In-Reply-To: <1244188941.23533.16.camel@penberg-laptop> References: <4A242C81.6020906@cs.helsinki.fi> <20090604112738.4c01d35e@jbarnes-x200> <1244188941.23533.16.camel@penberg-laptop> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.20; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 05 Jun 2009 11:02:21 +0300 Pekka Enberg wrote: > Hi Jesse, > > (I am cc'ing linux-kernel.) > > On Mon, 01 Jun 2009 22:31:13 +0300 > > Pekka Enberg wrote: > > > > > Hi Jesse, > > > > > > I am seeing this on my Eee PC 701 which is running a Ubuntu > > > 2.6.28-11.42-generic stock kernel: > > > > > > [ 76.826966] [drm:i915_gem_detect_bit_6_swizzle] *ERROR* Couldn't > > > read from MCHBAR. Disabling tiling. > > > [ 76.827215] [drm] Initialized i915 1.6.0 20080730 on minor 0 > > > [ 76.834037] [drm:i915_setparam] *ERROR* unknown parameter 4 > > > [ 76.834104] [drm:i915_getparam] *ERROR* Unknown parameter 6 > > > > > > Google turned up this patch > > > > > > http://lists.freedesktop.org/archives/intel-gfx/2009-January/001186.html > > > > > > but I don't seem to find it mainline kernel. > > > > > > Was the bug fixed in some other way? It seem that distributions have > > > not yet picked up your patch and I am unsure if it's in any of the > > > -stable kernels. > > On Thu, 2009-06-04 at 11:27 +0100, Jesse Barnes wrote: > > I think Eric acked it but may not have pushed it to drm-intel-next > > yet. Should happen in the next week or two though as we prepare the > > merge window series. > > OK, thanks for the info! FYI, I tested 2.6.30-rc8 with your patch > applied and everything works smoothly on my EeePC 701. I did not test > plain 2.6.30-rc8 as I expect it to show same kind of behavior as Ubuntu > distro kernel. Is this correct or do you want me to test 2.6.30-rc8 too? > > I wonder why the patch hasn't received more attention as it's a pretty > critical bug. The _default_ Ubuntu 9.04 netbook remix installation is > completely broken for EeePC 701 (and probably others as well) without > the patch. And it's not as if I'm the only one that suffers from it. A > quick Google search reveals that a lot of people are hitting it. > > So I really do think we need to merge this patch to the upcoming 2.6.31 > ASAP and backport it to -stable after it has gotten some more testing. > Wanna show us the patch? Because the world could certainly do with more i915 bugfixes :(