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: Fri, 24 Feb 2023 16:29:10 +0200 Message-ID: References: <04d7cb31-684c-07c0-ee7b-503514fc1a85@yandex.ru> <83edqjtbss.fsf@gnu.org> <4e5e2a46-9b07-206a-6774-9f98f34cbd14@yandex.ru> <83y1orrolh.fsf@gnu.org> <83sfeyswdw.fsf@gnu.org> <877cwactgv.fsf@yahoo.com> <83mt55sxli.fsf@gnu.org> <8afe34f2-eeea-3be8-82ef-576a115beb6d@yandex.ru> <83ilfsrj4z.fsf@gnu.org> <871qmgoh08.fsf@yahoo.com> <51980b63-8387-3a25-8b08-ec26e656cebd@yandex.ru> <87r0ug5xu5.fsf@yahoo.com> <87edqf6fpm.fsf@yahoo.com> <44f4a642-c631-f81d-8a79-1aa5116f214a@yandex.ru> <87y1on43xs.fsf@yahoo.com> <87pm9z412q.fsf@yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37818"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Cc: 61667@debbugs.gnu.org, Eli Zaretskii , gregory@heytings.org To: Po Lu Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Feb 24 15:30:17 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 1pVZ5V-0009dV-Ep for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 24 Feb 2023 15:30:17 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pVZ5K-0002JZ-5v; Fri, 24 Feb 2023 09:30:06 -0500 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 1pVZ5I-0002G2-7W for bug-gnu-emacs@gnu.org; Fri, 24 Feb 2023 09:30:04 -0500 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 1pVZ5H-00043J-QU for bug-gnu-emacs@gnu.org; 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Fri, 24 Feb 2023 06:29:12 -0800 (PST) Content-Language: en-US In-Reply-To: <87pm9z412q.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:256606 Archived-At: On 24/02/2023 15:58, Po Lu wrote: > Dmitry Gutov writes: > >> I vaguely recall them talking about such problem and working on it, >> from certain dev blogs. Though I though it was supposedly fixed in >> GNOME 43.1 (which I'm using). >> >> But how does it relate to our situation? If GNOME refreshes windows >> more often that it has to, then it's a performance problem for them >> (re-rendering takes cycles), but not a correctness problem. >> >> The only things it should do to us, is helping to mask our problem >> (when Emacs doesn't refresh quickly enough) by forcing additional >> repaints. > > The problem is that I suspect Mutter is forgetting to queue a buffer > flip or to update its back buffer with Emacs's window contents, since > judging by the logs you sent, Emacs is making the same buffer swapping > requests regardless of whether or not the bug can be reproduced. > >>> But before you do so, please try the following: >>> - Use a less resource intensive testing program (not Firefox or >>> Telegram Desktop) such as ``xclock -update 1''. >>> - Update to the latest version of GNOME Shell. >> >> I can reproduce the bug when the Emacs window covers xclock. > > Right, what if you move xclock so only half of the clock is obscured? If both of these are true: - xclock is only partially obscured (half-ish). - The updated frequency is high (xclock -update 0.001) then I can't reproduce the problem anymore. If either is false (e.g. if I'm using 'xclock -update 1'), then the problem reproduces still, albeit with a little lesser frequency. > Also, when you run ``xprop'' and then click on Emacs's window, what is > the value of the property _NET_WM_OPAQUE_REGION? _NET_WM_OPAQUE_REGION(CARDINAL) = 0, 0, 1456, 1296 > Another idea would be to place a constantly updating transluscent window > on top of Emacs, which will force mutter to copy the up-to-date contents > of the frame in to its back buffer. But I know of no easy test program > for that, I might write one tomorrow. Thank you.