Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753233Ab3IVVu4 (ORCPT ); Sun, 22 Sep 2013 17:50:56 -0400 Received: from smtp.fireflyinternet.com ([109.228.6.236]:11499 "EHLO fireflyinternet.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752137Ab3IVVuz (ORCPT ); Sun, 22 Sep 2013 17:50:55 -0400 X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=87.106.93.118; X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.73.22; Date: Sun, 22 Sep 2013 22:50:48 +0100 From: Chris Wilson To: Daniel Vetter Cc: Thomas Richter , intel-gfx , Linux Kernel Mailing List Subject: Re: [Intel-gfx] i835GM flicker on panning Message-ID: <20130922215048.GA6986@nuc-i3427.alporthouse.com> Mail-Followup-To: Chris Wilson , Daniel Vetter , Thomas Richter , intel-gfx , Linux Kernel Mailing List References: <4319_1379778790_523DC0E3_4319_13540_1_CAKMK7uHynzChMurTLAYMfeRF07aDJxes-6eSO1iDbrET8xD84Q@mail.gmail.com> <523F2390.5030702@math.tu-berlin.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: 78.156.73.22 X-To-Not-Matched: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1055 Lines: 22 On Sun, Sep 22, 2013 at 10:03:21PM +0200, Daniel Vetter wrote: > Hm, that sounds a bit more like the ddx is having fun with rendering. > Have you tried switching the backed from to either SNA or UXA? Also > adding relevant mailing lists ... If it was just the ddx, you would observe the same tearing with the rotated setup as well. The question here would be whether it is tearing or flicker? Tearing would just be the usual frontbuffer rendering artifact. However, flicker could be misrendering of a DRI client (seeing the backbuffer etc) or a clock timing issue (pipe underruns and whatnot). Using a rotated framebuffer would disable pageflipping, and prevent the historically common glitches when flipping. (Historically? That's hysterical!) -Chris -- Chris Wilson, Intel Open Source Technology Centre -- 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/