From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757380AbZCWJw3 (ORCPT ); Mon, 23 Mar 2009 05:52:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753557AbZCWJwU (ORCPT ); Mon, 23 Mar 2009 05:52:20 -0400 Received: from mail-fx0-f158.google.com ([209.85.220.158]:64613 "EHLO mail-fx0-f158.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752173AbZCWJwT (ORCPT ); Mon, 23 Mar 2009 05:52:19 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=nNe93nTmnTfU8dhruobKQKDE5Y3Zoc7DaXSXGU3ekpmNAGYSSxwFzI/T1njhCvGAH6 gbY2FQdjd3PO5uiJuUDkFpdfEmGnf1CxeWcl2ueboUmjQL6qXVB/82BUsVSE7BnPbjgN Do4R3Ajr67fRktoNpKrEpGpcu8IqjN7EegHIM= MIME-Version: 1.0 In-Reply-To: <9b2b86520903230250q15ffd726k8f20bb13f8321f22@mail.gmail.com> References: <4905CFC3.1060907@tuffmail.co.uk> <1225130422.4845.35.camel@gaiman.anholt.net> <9b2b86520903230250q15ffd726k8f20bb13f8321f22@mail.gmail.com> Date: Mon, 23 Mar 2009 09:52:15 +0000 Message-ID: <9b2b86520903230252m4d95351ejcd0742c9d271a2b5@mail.gmail.com> Subject: Re: 2.6.28-rc1: [drm:i915] *ERROR* ... Disabling tiling From: Alan Jenkins To: Eric Anholt Cc: dri-devel@lists.sourceforge.net, Kernel Testers List , linux-kernel Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/23/09, Alan Jenkins wrote: > On 10/27/08, Eric Anholt wrote: >> On Mon, 2008-10-27 at 14:27 +0000, Alan Jenkins wrote: >>> What does this mean, should I do anything about it? Is tiling nice to >>> have? >>> >>> It sounds like GEM broke something - though maybe it just added a more >>> verbose error report. >>> >>> System: EeePC 701 >>> Kernel: v2.6.28-rc1-5-g23cf24c >>> Chipset: Intel mobile 915G-something >>> Regretably necessary kernel boot option: noapic >>> >>> >>> [ 1.438441] Linux agpgart interface v0.103 >>> [ 1.438441] agpgart-intel 0000:00:00.0: Intel 915GM Chipset >>> [ 1.438441] agpgart-intel 0000:00:00.0: detected 7932K stolen memory >>> [ 1.443353] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ >>> 0xd0000000 >>> [ 1.443353] [drm] Initialized drm 1.1.0 20060810 >>> [ 1.443353] pci 0000:00:02.0: PCI INT A -> Link[LNKA] -> GSI 5 >>> (level, low) -> IRQ 5 >>> [ 1.443353] pci 0000:00:02.0: setting latency timer to 64 >>> [ 1.443353] [drm:i915_gem_detect_bit_6_swizzle] *ERROR* Couldn't read >>> from MCHBAR. Disabling >>> tiling. >> >> This means that something went wrong with our detection of the >> CPU-versus-GPU tiling swizzling mode, and object tiling under GEM will >> be disabled as a result. I should get access to an eee 7xx on Thursday >> to see what's up with it -- it's supposed to be just a normal 915gm as >> far as I know. > > Any news about this tiling error? > > It's already been reported as a bug in Ubuntu Jaunty, in the belief > that it "reduces video performance" [1], and is also mentioned on a > similar bug in Fedora [2]. > > [1] > [2] > Ah, I should also mention that I still see the error on the latest RC, 2.6.29-rc8. Alan