From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756927AbZCWJum (ORCPT ); Mon, 23 Mar 2009 05:50:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753650AbZCWJuc (ORCPT ); Mon, 23 Mar 2009 05:50:32 -0400 Received: from mail-bw0-f169.google.com ([209.85.218.169]:49682 "EHLO mail-bw0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752943AbZCWJub (ORCPT ); Mon, 23 Mar 2009 05:50:31 -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=xkU/ATbF22Gn3zqKGfM0ahyUDKxuHRmNEpnTGOAxju8ALsk/jaJ0/wiUt7A3Pwop6A mL7Pg8BPArA+2eeu3fRlVLty9TV2Mn8ruiXT7f1o6R3ZZyroW5hTAbC4Sx6lyexsub+M 1eJ1lC8uMICDqiTkgsorYydes3+1tYCAezew0= MIME-Version: 1.0 In-Reply-To: <1225130422.4845.35.camel@gaiman.anholt.net> References: <4905CFC3.1060907@tuffmail.co.uk> <1225130422.4845.35.camel@gaiman.anholt.net> Date: Mon, 23 Mar 2009 09:50:28 +0000 Message-ID: <9b2b86520903230250q15ffd726k8f20bb13f8321f22@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 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] Thanks Alan