From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Dmitry Gutov Newsgroups: gmane.emacs.bugs Subject: bug#61667: 29.0.60; Failure to redisplay Date: Sat, 4 Mar 2023 02:22:52 +0200 Message-ID: <314421f7-3964-572e-8e3a-e31b510fd097@yandex.ru> References: <04d7cb31-684c-07c0-ee7b-503514fc1a85@yandex.ru> <8716b41c97839d6a8b87@heytings.org> <7fee18a7-3307-b6de-1428-ae17d51c85af@yandex.ru> <9ac9271f1ee55a9b8bbf@heytings.org> <87a60y13ou.fsf@yahoo.com> <674e150e-fcbe-7d67-962e-214cfaec2ca0@yandex.ru> <875ybl1dii.fsf@yahoo.com> <2b249c97-db63-34e1-80c2-0c898005e31f@yandex.ru> <87zg8xyt0m.fsf@yahoo.com> <25c817d9-f969-8c24-6ed4-9b35fd6f27ad@yandex.ru> <87sfeozn8f.fsf@yahoo.com> <87o7pczlsq.fsf@yahoo.com> <43d50d6a-1eb0-cd42-0479-3f9d4d74904a@yandex.ru> <87ilfkyorf.fsf@yahoo.com> <8f4df0d7-eb1a-379a-db03-314f2c93743b@yandex.ru> <87a60vztad.fsf@yahoo.com> <83ttz3eig2.fsf@gnu.org> <721a1bb0-c1c6-70a1-02a8-408445e19fde@yandex.ru> <87lekdwfjj.fsf@yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; 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Fri, 03 Mar 2023 16:22:54 -0800 (PST) Original-Received: from [192.168.0.2] ([46.251.119.176]) by smtp.googlemail.com with ESMTPSA id m16-20020a056000009000b002be099f78c0sm3410999wrx.69.2023.03.03.16.22.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 03 Mar 2023 16:22:54 -0800 (PST) Content-Language: en-US In-Reply-To: <87lekdwfjj.fsf@yahoo.com> 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:257244 Archived-At: On 04/03/2023 02:01, Po Lu wrote: >> But there is a persistent glitch: when the window configuration >> changes, 1 or 2 vertical bars often flash: >> >> https://a.uguu.se/iYTlOftH.mp4 (with emacs -Q) >> >> https://a.uguu.se/YdDWpMid.mp4 (with my config but with tool-bar and >> scroll-bar modes enabled) >> >> scroll-bar-mode on seems to be required to reproduce this. > This is expected: moving the scroll bar causes exposures, which can > cause flickering. That's the problem double buffering is supposed to > fix. Isn't it odd, though, that in both cases the glitch is positioned around 1/2 of the scroll-bar's horizontal coordinate (relative to the left edge of the frame)? When there is one scroll-bar, there is one glitch; when there are two scroll-bars, there are two glitches. My guess is that might be related to the display scale (2x).