From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "angelo.graziosi@libero.it" Newsgroups: gmane.emacs.bugs Subject: bug#23510: Strange redisplay in global highlighted mode moving the scroll bar Date: Tue, 10 May 2016 21:31:26 +0200 (CEST) Message-ID: <1959517970.14624161462908686797.JavaMail.httpd@webmail-60.iol.local> Reply-To: "angelo.graziosi@libero.it" NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain;charset="UTF-8" Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1462911399 9896 80.91.229.3 (10 May 2016 20:16:39 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 10 May 2016 20:16:39 +0000 (UTC) To: 23510@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue May 10 22:16:27 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1b0E4v-0001pi-VM for geb-bug-gnu-emacs@m.gmane.org; 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The following should be reproducible with the following simple init.el: $ cat init.el ;; (global-hl-line-mode 1) Now, in the scratch buffer, copy and paste many times its text (;; This buffer...) so that the scratch buffer has many lines, not all contained in the Emacs window/frame. Move the cursor on a line, more or less at the center of the window. The line is highlighted (in green, by default). Now move slowly up/down the scroll bar, then the highlighted line seems to flicker as if it were redrawn at (almost) each pixel movement of the scroll bar. Is this to be expected? Other software with same feature do not show this "flickering" and the highlight moves synchronously with the text. The effect is visible not only with vertical scroll bar but also with the horizontal. I see this with my master builds on Windows, GNU/linux and OSX. Angelo