Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757235AbZJDNol (ORCPT ); Sun, 4 Oct 2009 09:44:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756833AbZJDNok (ORCPT ); Sun, 4 Oct 2009 09:44:40 -0400 Received: from mail-fx0-f227.google.com ([209.85.220.227]:45357 "EHLO mail-fx0-f227.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756674AbZJDNoj convert rfc822-to-8bit (ORCPT ); Sun, 4 Oct 2009 09:44:39 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:cc:references:in-reply-to :mime-version:content-type:content-transfer-encoding:message-id; b=TZ5j5Gm0hxK2Ru1jGLlE4KIHffgyArtb87+uYmfUtmKZ3JdbZo7qQgHS+eXPgb5Oah OZ3ZiVbLAnHKgCvheeTt5SjwvOMMxM9KN3FyLNAu9Dk6abscg7LriCtam3MtZLgVroTs PMNQjE7JxcdgsGr2UCXuXeB275VdfQ0otRJk0= From: Arkadiusz Miskiewicz To: linux-kernel@vger.kernel.org Subject: Re: 2.6.32 regression (bisected): Video tearing/glitching with T400 laptops Date: Sun, 4 Oct 2009 15:43:57 +0200 User-Agent: KMail/1.12.2 (Linux/2.6.32-rc2; KDE/4.3.2; x86_64; ; ) Cc: "Theodore Ts'o" , Jesse Barnes , Eric Anholt References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 8BIT Message-Id: <200910041543.57479.a.miskiewicz@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1920 Lines: 48 On Saturday 03 of October 2009, Theodore Ts'o wrote: > Hi, > > In recent kernels, my X display (running with a KMS-enabled X server) > has been very jittery and with lots of glitching and tearing --- sorry > if this isn't the correct technical term, not sure what it is --- on my > T400 Lenovo laptop. It seems related to what is on the desktop, and > moving the mouse does seem to affect the rate and percentage of the > screen which jitters --- which is enough to be very distracting, > although I can still read the contents of the windows where the screen > is tearing/glitching/flashing. > > I bisected it down to this commit: > > 74dff282237ea8c0a5df1afd8526eac4b6cee063 is the first bad commit > commit 74dff282237ea8c0a5df1afd8526eac4b6cee063 > Author: Jesse Barnes > Date: Mon Sep 14 15:39:40 2009 -0700 > > drm/i915: framebuffer compression for GM45+ Disabling compression works fine (as temporary workaround until the issue is solved). diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7a5fb79..075092b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4165,7 +4165,7 @@ static void intel_init_display(struct drm_device *dev) /* Only mobile has FBC, leave pointers NULL for other chips */ if (IS_MOBILE(dev)) { - if (IS_GM45(dev)) { + if (0 && IS_GM45(dev)) { dev_priv->display.fbc_enabled = g4x_fbc_enabled; dev_priv->display.enable_fbc = g4x_enable_fbc; dev_priv->display.disable_fbc = g4x_disable_fbc; -- Arkadiusz Miśkiewicz PLD/Linux Team arekm / maven.pl http://ftp.pld-linux.org/ -- 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/