Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758324AbYFXXXj (ORCPT ); Tue, 24 Jun 2008 19:23:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758100AbYFXXXI (ORCPT ); Tue, 24 Jun 2008 19:23:08 -0400 Received: from mga03.intel.com ([143.182.124.21]:13169 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757309AbYFXXXF (ORCPT ); Tue, 24 Jun 2008 19:23:05 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.27,698,1204531200"; d="scan'208";a="2146236" Date: Tue, 24 Jun 2008 16:22:52 -0700 From: Suresh Siddha To: Frans Pop Cc: "Siddha, Suresh B" , "Rafael J. Wysocki" , Linux Kernel Mailing List , "Pallipadi, Venkatesh" , Ingo Molnar , "arjan@linux.intel.com" , "jbarnes@virtuousgeek.org" Subject: Re: [Bug 10843] Display artifacts on XOrg logout with PAT kernel and VESA framebuffer Message-ID: <20080624232252.GA24620@linux-os.sc.intel.com> References: <200806142359.36613.elendil@planet.nl> <8B23168BCBB43B49A4C8EAB32D4B62F1061F3A82@orsmsx505.amr.corp.intel.com> <200806231439.00899.elendil@planet.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200806231439.00899.elendil@planet.nl> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2288 Lines: 55 On Mon, Jun 23, 2008 at 05:38:59AM -0700, Frans Pop wrote: > On Sunday 15 June 2008, Siddha, Suresh B wrote: > > Frans Pop wrote: > > > On Saturday 14 June 2008, Rafael J. Wysocki wrote: > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10843 > > > > Subject : Display artifacts on XOrg logout with PAT kernel > > > > and VESA framebuffer > > > > Submitter : Frans Pop > > > > Date : 2008-05-31 14:04 (15 days old) > > > > References : http://lkml.org/lkml/2008/6/7/206 > > > > > > Yes. See also: http://lkml.org/lkml/2008/6/13/159 > > > > Frans, With or without pat, in the recent kernels (like 2.6.26-rc4/rc5 > > etc), ioremap() uses UC- and PCI mmap of /sys/devices/pci.../resource > > (used by X) uses UC- > > > > And fb_mmap() also uses UC-. > > > > It's interesting that you don't see this artifact with "nopat". > > Essentially with or with out pat enabled, we use the same memory > > attributes. So depending on the MTRR setup (set by X server), effective > > memory attribute across different mappings should be same (which is UC- > > or WC with mtrr). > > Any progress on this issue? It's still there with -rc7, but I doubt that > comes as a surprise. > > Has anyone tried to reproduce this? I would think that should be trivial. > > Just as a summary: > - Intel 82945G/GZ graphics [8086:2772] (ICH7 based system) > - FB_VESA=y, FRAMEBUFFER_CONSOLE=y > - boot with vga=791 > - Log in to X and KDE; I do need to really log in there are no artifacts > if I exit X from the kdm login dialog > - artifacts show on logout > > I doubt it's KDE related or even related to my specific graphics card. > > It may well be related to what is or has been displayed on the display > before logging out, so running some apps may make sense. Seems like I do > see remnants of for example aptitude (Debian apt frontend) after I've run > it in an X term (KDE's konsole). FJP, We will try to reproduce this and getback. Your earlier responses did not give many clues. thanks, suresh -- 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/