From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#28652: 26.0.60; Display often "flashes" due to double buffering when switching to Emacs frames Date: Fri, 03 Sep 2021 09:57:17 +0200 Message-ID: <87a6ku2isi.fsf@gnus.org> References: <87377573ac.fsf@moondust.localdomain> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20143"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 28652@debbugs.gnu.org To: nljlistbox2@gmail.com (N. Jackson) Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Sep 03 09:58:11 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mM45S-000515-Id for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 03 Sep 2021 09:58:10 +0200 Original-Received: from localhost ([::1]:59908 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mM45R-0004fW-6o for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 03 Sep 2021 03:58:09 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58294) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mM45K-0004fG-9Q for bug-gnu-emacs@gnu.org; Fri, 03 Sep 2021 03:58:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:59495) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mM45J-00005Y-Sn for bug-gnu-emacs@gnu.org; Fri, 03 Sep 2021 03:58:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mM45J-0003EV-PR for bug-gnu-emacs@gnu.org; Fri, 03 Sep 2021 03:58:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 03 Sep 2021 07:58:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 28652 X-GNU-PR-Package: emacs Original-Received: via spool by 28652-submit@debbugs.gnu.org id=B28652.163065584812363 (code B ref 28652); Fri, 03 Sep 2021 07:58:01 +0000 Original-Received: (at 28652) by debbugs.gnu.org; 3 Sep 2021 07:57:28 +0000 Original-Received: from localhost ([127.0.0.1]:42805 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mM44m-0003DL-88 for submit@debbugs.gnu.org; Fri, 03 Sep 2021 03:57:28 -0400 Original-Received: from quimby.gnus.org ([95.216.78.240]:54598) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mM44k-0003D2-Vi for 28652@debbugs.gnu.org; Fri, 03 Sep 2021 03:57:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=uxwhRdqP4R5CSST7fg26d+4S4M3KtaEs8NQupS1Fmb0=; b=JE/Po6YRj/NoG/HCgkjtjaIAKX ATneEUu8P+QgnT+DYcW1+NzfgDR2vFJNMPnqvPRGtcaAEob/eFTuWPkyHcOcg4c8yB58aJAXl8P7A UrlGerr0sxhNUpt+2fiA89k4cvSybtuldsYF33SH2Y8fAVNqlT/md1MRg00qqYSwRhxA=; Original-Received: from [84.212.220.105] (helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mM44b-0005GD-Se; Fri, 03 Sep 2021 09:57:20 +0200 In-Reply-To: <87377573ac.fsf@moondust.localdomain> (N. Jackson's message of "Fri, 29 Sep 2017 14:44:43 -0400") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:213330 Archived-At: nljlistbox2@gmail.com (N. Jackson) writes: > When switching between windows in Gnome using Alt-Tab there is > often a bright flash just after switching to an Emacs frame. > > It seems as if the Emacs frame is displayed and then a window of > some other application appears for a fraction of a second before > the display settles down to the showing the Emacs frame. > > Because the flash is so quick, I Initially thought the Emacs frame > was being displayed in white before being painted to it's correct > display, but this is not the case. By choosing distinctive colours > or distinctive images in my other applications, I can tell that it > is the window of another application that is flashing up. > > [This flashing might be particularly noticeable on this system as > I use a dark theme in Emacs (Wheatgrass) and most other > application windows are predominantly white. Also I keep all my > Emacs frames and all my other application windows maximised or > full screen (because I have a small display).] (I'm going through old bug reports that unfortunately weren't resolved at the time.) I'm also using Gnome (I'm on Debian bullseye), but I can't see these flashes (I've tried in Emacs 26.1 and Emacs 28) when Alt-Tab-ing between something that has a bright background and Emacs (which has a black background). Are you still seeing this in recent Emacs/Gnome versions? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no