Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754222Ab1BTCUU (ORCPT ); Sat, 19 Feb 2011 21:20:20 -0500 Received: from smarthost1.greenhost.nl ([195.190.28.78]:44815 "EHLO smarthost1.greenhost.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751375Ab1BTCUT (ORCPT ); Sat, 19 Feb 2011 21:20:19 -0500 Message-ID: <92f5b87a3559ed7f1b7c46b7497c1ad5.squirrel@webmail.greenhost.nl> In-Reply-To: <20110219182511.GA3977@viiv.ffwll.ch> References: <3f9bbd0924f54f6241cc16293fbcbbb4.squirrel@webmail.greenhost.nl> <20110219182511.GA3977@viiv.ffwll.ch> Date: Sun, 20 Feb 2011 03:20:15 +0100 (CET) Subject: Re: [BUG] drm/i915 Screen corruption introduced by a00b10c360b35d6431a94cb From: "Indan Zupancic" To: "Indan Zupancic" , "Chris Wilson" , "LKML" , dri-devel@lists.freedesktop.org User-Agent: SquirrelMail/1.4.17 MIME-Version: 1.0 Content-Type: text/plain;charset=UTF-8 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-Spam-Score: 0.0 X-Scan-Signature: f0eed3f1d89bc5fb772880ef8d54351a Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2071 Lines: 51 Hi, On Sat, February 19, 2011 19:25, Daniel Vetter wrote: > Hi Indan, > > Please provide the usual details about your system (especially what gpu > this is on). Also, screenshots of what typical corruptions look like can > help a lot in tracking down such things. Sorry, I plainly forgot to mention that. I'm on my Thinkpad X40 with gen 2 hardware, 855GM. I uploaded a screenshot of Firefox to: http://img406.imageshack.us/img406/9159/31827167.png It happens a lot when scrolling in FF on pages with images, pageup or pagedown don't exhibit it. Text gets corrupted as well, but in a less predictable way. It must be something that FF does that triggers it easily, I haven't managed to get it with other programs yet, though I do see some corruption in the window decoration too sometimes (which is Fluxbox). Scrolling horizontally doesn't show the same behaviour. The corruptions seems to be happening on the right side of a surface/window. Forcing a refresh makes it go away again (e.g. switching to another window or opening another window on top of it. Moving a window doesn't though). I get it with and without xcompmgr running. Okay, interesting titbit: For text corruption, the stripes are one pixel high for the default font size, no corruption for smaller sizes than the default, two pixel lines for 1 ctrl+ bigger than the default, 3 pixels for +2 etc. With bigger sizes (>=5) I get less corruption to the left of the text, but more in the text itself. The distance between the lines continues to increase, but the stripes thickness goes back to 1 pixel. Perhaps an off-by-one error somewhere? > I've created two quick patches to check a few theories, please test them > (both patches independently and both together). Patches attached. Tried with both applied, doesn't change anything. Greetings, Indan -- 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/