Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753828Ab0HXACa (ORCPT ); Mon, 23 Aug 2010 20:02:30 -0400 Received: from silver.sucs.swan.ac.uk ([137.44.10.1]:43603 "EHLO silver.sucs.swan.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753026Ab0HXAC0 (ORCPT ); Mon, 23 Aug 2010 20:02:26 -0400 X-Greylist: delayed 1592 seconds by postgrey-1.27 at vger.kernel.org; Mon, 23 Aug 2010 20:02:26 EDT Date: Tue, 24 Aug 2010 00:35:51 +0100 From: Sitsofe Wheeler To: LKML , dri-devel@lists.freedesktop.org, Chris Wilson Subject: [REGRESSION, i915]: Periodic stalls with 2.6.36-rc2 Message-ID: <20100823233551.GA31920@sucs.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1582 Lines: 36 Hi, With 2.6.36-rc2 I see periodic stalls when running with a stock Ubuntu 10.04 userspace. These stalls were not present in 2.6.36-rc1 on an EeePC 900 with an i915. Attempts to bisect the issue are not successful - most kernels in between rc1 and rc2 just make the system come up with a black screen which takes minutes between showing messages (rather than finishing in two seconds). bc584c5107bfd97e2aa41c798e3b213bcdd4eae7 seems to be good but 45d7f32c7a43cbb9592886d38190e379e2eb2226 is not. Warnings like: [ 64.227046] [drm:intel_calculate_wm] *ERROR* Insufficient FIFO for plane, expect flickering: entries required = 36, available = 31. [ 82.953011] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU idle, missed IRQ. appear frequently in the dmesg and the stalls are most visible when playing fullscreen video. The first warning message (Insufficient FIFO...) is present in 2.6.36-rc1 but not 2.6.35. One additional quirk is that a more recent X userspace (xserver-xorg-video-intel 2:2.12.0+git20100810.19c48d3b-0ubuntu0sarvatt2~lucid, libdrm-intel1 2.4.21+git20100804.431f7f00-0ubuntu0sarvatt~lucid, xorg 1:7.5+6ubuntu1) now has major tearing (when watching video) and refresh (in general at least when using compiz) issues which were not seen with 2.6.36-rc1. -- Sitsofe | http://sucs.org/~sits/ -- 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/