From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Drew Adams Newsgroups: gmane.emacs.bugs Subject: bug#66247: 29.1; Transient frame problems with Emacs 29 on MS Windows Date: Fri, 29 Sep 2023 18:21:16 +0000 Message-ID: References: <87y1gpn5a9.fsf@yahoo.com> <87ttrdn16x.fsf@yahoo.com> <83jzs9x7n8.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="18086"; mail-complaints-to="usenet@ciao.gmane.io" Cc: "luangruo@yahoo.com" , "66247@debbugs.gnu.org" <66247@debbugs.gnu.org> To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Sep 29 20:22:26 2023 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 1qmI89-0004Pb-Rj for geb-bug-gnu-emacs@m.gmane-mx.org; 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I've never noticed any "display > > > > flicker" there. Quite the opposite. I used > > > > > > That's subject to the graphics driver installed, I believe. Many MS > > > Windows users reported severe flicker while scrolling in the past, a > > > problem that has all but vanished with the introduction of double > > > buffering. > > > > Many MS Windows users? Are you sure? And > > how many had no problem, and so never sent > > a non-complaint because of no flickering, > > let along no "severe" flickering? >=20 > Almost all of them. You are a happy exception. OK, thanks; good (for them, at least), and good to know. > It is expected that it will cause a regression on some systems, which > is why the way to disable double-buffering is in NEWS. Yes, good. But as I explained, that doesn't fix all of the problems introduced. See what I said about the delayed correct rendering of the frame edge and scroll bar: they continue to appear for a brief time in their old positions even after the frame itself has been enlarged - and then they jump out to where they belong (respecting the new frame size). >=20 > > Changing default behavior shouldn't, in general, > > happen willy-nilly with a new release. >=20 > It didn't. We introduced it in Emacs 26 (but not on Windows). >=20 > > It's generally better to wait for user experience and request - even > > a long time - before changing the _default_ behavior. >=20 > We had enough user experience before we decided to > have this on by default. OK, good. So now there's one user reporting a new problem when trying to get back to no double-buffering. I'm sorry I don't have a reproduction recipe. Maybe another user will be bit by the same problem and have better info about it.