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.bugs Subject: bug#58980: 29.0.50; Mouse wheel scroll twitches up sometimes when I scroll down Date: Thu, 03 Nov 2022 10:31:52 +0200 Message-ID: <83fsf08mmf.fsf@gnu.org> References: Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10675"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 58980@debbugs.gnu.org To: Mickey Petersen , Po Lu Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Nov 03 09:33:37 2022 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 1oqVfM-0002Xg-Re for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 03 Nov 2022 09:33:36 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oqVf7-00089u-WB; Thu, 03 Nov 2022 04:33:22 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oqVeo-00086a-Lq for bug-gnu-emacs@gnu.org; Thu, 03 Nov 2022 04:33:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oqVeo-0001gn-Bz for bug-gnu-emacs@gnu.org; Thu, 03 Nov 2022 04:33:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oqVen-0007m3-Qv for bug-gnu-emacs@gnu.org; Thu, 03 Nov 2022 04:33:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 03 Nov 2022 08:33:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 58980 X-GNU-PR-Package: emacs Original-Received: via spool by 58980-submit@debbugs.gnu.org id=B58980.166746433829830 (code B ref 58980); Thu, 03 Nov 2022 08:33:01 +0000 Original-Received: (at 58980) by debbugs.gnu.org; 3 Nov 2022 08:32:18 +0000 Original-Received: from localhost ([127.0.0.1]:47785 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oqVe6-0007l4-Gr for submit@debbugs.gnu.org; Thu, 03 Nov 2022 04:32:18 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:60552) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oqVe4-0007kq-AL for 58980@debbugs.gnu.org; Thu, 03 Nov 2022 04:32:16 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oqVdy-0001dP-TM; Thu, 03 Nov 2022 04:32:10 -0400 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=EdRjshF0DjVf1O/CSdsZKDuPzZVNqdh8xMe2T7IG2fA=; b=AjqYEBntV/GC cKXgfDdHFZxaZV6PV6AmLdsE16EV7itKWy6DM1fr3cZfiG6Ifmtaz5KmFNpbD9G2zROI5uxas4Nji LOzA+vP6Bpsxv1DHLnH1nVrtvModIF1cs7CxyrJqL3KvXOUOQRlZmJTwAP+kfzfEi7Wwz2dvfAzAi f2Giamn6De0wHVw8vNbLsybnJ/xJK1qKo5EaUDLpzoJx1qH68q41z5VOfnSuK0X13AunHGc5YVGl3 +XaK8ByLs3IZkdTbQZh6EFkJ+swx8ZL6rH/OoE7ffDbkidWJDrPFlqe/H8m2TfE+Y0D1uQanlHAAM DXew5xcREWkpVFnl8DavWA==; Original-Received: from [87.69.77.57] (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 1oqVdp-0002sm-Eu; Thu, 03 Nov 2022 04:32:10 -0400 In-Reply-To: (message from Mickey Petersen on Wed, 2 Nov 2022 16:20:40 +0000) 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: , Original-Sender: "bug-gnu-emacs" Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:246929 Archived-At: > Date: Wed, 2 Nov 2022 16:20:40 +0000 > From: Mickey Petersen > > When I scroll down with my mouse wheel -- typically after an existing > window has changed > buffers, such as after selecting (via keyboard or mouse) an Info manual > node -- > the scroll action sometimes (but not always) jerks upwards several > lines. I can then keep scrolling and it'll start scrolling down > again. This may sometimes happen after scrolling for a little while, and > sometimes not at all. > > It's hard to reproduce; but the issue affects a baseline Emacs build (-Q or > -q) and only sometimes. Please provide some kind of reproduction recipe, even if it doesn't happen every time. When it does happen, type "C-h l", and post the commands Emacs recorded that you were invoking immediately before the problem. Otherwise, it's very hard to do anything about the problem, unless someone here can reproduce it (I couldn't). > I had a look in the bug tracker for `scroll' and found nothing. I also > checked `M-x customize-changed' to look for likely culprits. I found > nothing that may cause this behaviour, beyond pixel scrolling, which > seems like a smoking gun to me, > but it's off by default in emacs -Q. > > 1. Is it possible there are changes the scrolling code that is active even > when that mode is not? > > 2. Could there be some sort of variable that determines scroll direction > that, somehow, gets confused? Hard to answer these questions, but maybe Po Lu with have clues.