From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#38199: 27.0.50; [Cairo] Display artifacts (small vertical colored bars) Date: Thu, 14 Nov 2019 15:30:31 +0200 Message-ID: <83tv7660w8.fsf@gnu.org> References: <87eeybd12v.fsf@bastian-desktop.i-did-not-set--mail-host-address--so-tickle-me> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="2153"; mail-complaints-to="usenet@blaine.gmane.org" Cc: 38199@debbugs.gnu.org To: Bastian Beischer Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Nov 14 14:31:15 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iVFDO-0000KZ-Bu for geb-bug-gnu-emacs@m.gmane.org; Thu, 14 Nov 2019 14:31:14 +0100 Original-Received: from localhost ([::1]:57548 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iVFDN-00054a-2A for geb-bug-gnu-emacs@m.gmane.org; Thu, 14 Nov 2019 08:31:13 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33209) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iVFDD-000548-95 for bug-gnu-emacs@gnu.org; Thu, 14 Nov 2019 08:31:08 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iVFDC-0003k1-9M for bug-gnu-emacs@gnu.org; Thu, 14 Nov 2019 08:31:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:52303) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iVFDC-0003jt-6K for bug-gnu-emacs@gnu.org; Thu, 14 Nov 2019 08:31:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iVFDC-0007js-26 for bug-gnu-emacs@gnu.org; Thu, 14 Nov 2019 08:31:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 14 Nov 2019 13:31:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 38199 X-GNU-PR-Package: emacs Original-Received: via spool by 38199-submit@debbugs.gnu.org id=B38199.157373825429726 (code B ref 38199); Thu, 14 Nov 2019 13:31:02 +0000 Original-Received: (at 38199) by debbugs.gnu.org; 14 Nov 2019 13:30:54 +0000 Original-Received: from localhost ([127.0.0.1]:32891 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iVFD4-0007jO-4T for submit@debbugs.gnu.org; Thu, 14 Nov 2019 08:30:54 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:52325) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iVFD2-0007j5-WA for 38199@debbugs.gnu.org; Thu, 14 Nov 2019 08:30:53 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:50414) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iVFCx-0003bQ-QB; Thu, 14 Nov 2019 08:30:47 -0500 Original-Received: from [176.228.60.248] (port=2232 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1iVFCx-0000EA-5H; Thu, 14 Nov 2019 08:30:47 -0500 In-reply-to: <87eeybd12v.fsf@bastian-desktop.i-did-not-set--mail-host-address--so-tickle-me> (message from Bastian Beischer on Wed, 13 Nov 2019 20:32:24 +0100) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:171586 Archived-At: > From: Bastian Beischer > Date: Wed, 13 Nov 2019 20:32:24 +0100 > > When emacs is built with cairo I see small display artifacts from time > to time, in particular there are small thin vertical bars, for example, > with the default theme (starting from emacs -Q) I get those bars in the > mode-line and they are always in a cyan color, but it is possible that > other occurences can be observed even with emacs -Q. > > In real world usage I have seen these bars in regular buffers, too, > usually they are red and/or blue but that might depend on my theme. > > A recipe to produce them (on my machine) is: > > 1) emacs -Q > 2) M-< > 3) C-space > 4) M-> > 5) M-w > 6) C-y (repeat ten or twenty times) > > Then move around in the resulting buffer and after a bit of cursor > movement the vertical lines appear. They are not permanent and often > disappear when the buffer is refreshed. Did you try to disable "advanced" or "optimization" features of your display driver software? Or upgrade it to a newer version? The artifacts your screenshot shows don't look like something Emacs could produce. Can someone else reproduce this in a Cairo build? Thanks.