From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Flicker on MS Windows Date: Mon, 07 Mar 2022 16:28:21 +0200 Message-ID: <83o82hg7lm.fsf@gnu.org> References: <87o82jpeee.fsf.ref@yahoo.com> <87o82jpeee.fsf@yahoo.com> <83ee3fgwq3.fsf@gnu.org> <87fsnvpbh7.fsf@yahoo.com> <83y21nezys.fsf@gnu.org> <87ee3eoarz.fsf@yahoo.com> <83v8wqexox.fsf@gnu.org> <87a6e1n9j5.fsf@yahoo.com> <83pmmxg7w8.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="11312"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: luangruo@yahoo.com Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Mar 07 15:30:13 2022 Return-path: Envelope-to: ged-emacs-devel@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 1nRENH-0002jE-GP for ged-emacs-devel@m.gmane-mx.org; Mon, 07 Mar 2022 15:30:11 +0100 Original-Received: from localhost ([::1]:41244 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nRENF-0004vp-Vh for ged-emacs-devel@m.gmane-mx.org; Mon, 07 Mar 2022 09:30:09 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:45812) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nRELn-0003Wa-Nh for emacs-devel@gnu.org; Mon, 07 Mar 2022 09:28:40 -0500 Original-Received: from [2001:470:142:3::e] (port=44274 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nRELg-00085E-KB; Mon, 07 Mar 2022 09:28:38 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=q8GUyoIAq1kzZyEUeU44aKmurigpCDlwAu3IqbHma2E=; b=oPqrtTG2Jh9t cqjwGR5dJrqRZ6AnKmBc7h91yxtsEHmw2JLGQ7VxwSqDonvQT0du+9AqcI++azrhf4ZjONrkARQ1d HAhEUm9IS5FEYZSb63QzzToKWNwP7+3+QsXqFA8k1Qo26SpZl5rkvc54EK0fku6zZ59LziDQnnsXr LU9s+5dZAYKAwa1V4XnH+5T/s80PRjXC85ksM8QUJgQT5tMf2+KnDWSWIckEfNksrDAXD5kteXM8V 6Jvin0t3i5U4vpxm4Wjwhx8S/aVkh28cjSAGets81yrl65ePkV9ha5EH22P6nlJO3zJd7xF0kX8My 1zaT4DB1ZWwEv5ntisBPig==; Original-Received: from [87.69.77.57] (port=2199 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nRELf-0004lS-SP; Mon, 07 Mar 2022 09:28:32 -0500 In-Reply-To: <83pmmxg7w8.fsf@gnu.org> (message from Eli Zaretskii on Mon, 07 Mar 2022 16:21:59 +0200) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:286891 Archived-At: > Date: Mon, 07 Mar 2022 16:21:59 +0200 > From: Eli Zaretskii > Cc: emacs-devel@gnu.org > > > BTW, here's another way to reproduce some severe flicker on MS Windows: > > just type "M-: (run-hooks 'xref-after-jump-hook) RET", and the tool bar > > buttons, cursor and text start to flicker severely. The tool bar > > buttons flicker in a peculiar way: the background is displayed, but the > > image itself flickers with interleaved bands of black. > > I don't see any flickering here, after the above. The window > recenters and I see a single line pulsed; that's all. Moreover, Emacs > consumes exactly zero CPU cycles after evaluating that expression. FTR: on Windows 10 I'm testing this in Emacs 27.2.