From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#15999: 24.3.50; Redisplay broken with split windows Date: Fri, 29 Nov 2013 13:01:03 -0500 Message-ID: References: <87zjon6vv8.fsf@rosalinde.fritz.box> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1385748135 28182 80.91.229.3 (29 Nov 2013 18:02:15 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 29 Nov 2013 18:02:15 +0000 (UTC) Cc: 15999@debbugs.gnu.org To: Stephen Berman Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Nov 29 19:02:20 2013 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 1VmSOR-000346-Kk for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Nov 2013 19:02:19 +0100 Original-Received: from localhost ([::1]:48860 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VmSOR-00049R-9k for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Nov 2013 13:02:19 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:43387) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VmSOH-00049B-DO for bug-gnu-emacs@gnu.org; Fri, 29 Nov 2013 13:02:16 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VmSOA-0003Xu-36 for bug-gnu-emacs@gnu.org; Fri, 29 Nov 2013 13:02:09 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:36485) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VmSO9-0003Xq-V7 for bug-gnu-emacs@gnu.org; Fri, 29 Nov 2013 13:02:01 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1VmSO9-0004f0-L2 for bug-gnu-emacs@gnu.org; Fri, 29 Nov 2013 13:02:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 29 Nov 2013 18:02:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15999 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 15999-submit@debbugs.gnu.org id=B15999.138574807217830 (code B ref 15999); Fri, 29 Nov 2013 18:02:01 +0000 Original-Received: (at 15999) by debbugs.gnu.org; 29 Nov 2013 18:01:12 +0000 Original-Received: from localhost ([127.0.0.1]:50502 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VmSNL-0004dV-CN for submit@debbugs.gnu.org; Fri, 29 Nov 2013 13:01:11 -0500 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.181]:37474) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VmSNJ-0004dE-EI for 15999@debbugs.gnu.org; Fri, 29 Nov 2013 13:01:09 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av8EABK/CFHO+KEh/2dsb2JhbABEuzWDWRdzgh4BAQQBViMFCws0EhQYDSSIHgbBLZEKA4hhnBmBXoMV X-IPAS-Result: Av8EABK/CFHO+KEh/2dsb2JhbABEuzWDWRdzgh4BAQQBViMFCws0EhQYDSSIHgbBLZEKA4hhnBmBXoMV X-IronPort-AV: E=Sophos;i="4.84,565,1355115600"; d="scan'208";a="40704242" Original-Received: from 206-248-161-33.dsl.teksavvy.com (HELO pastel.home) ([206.248.161.33]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 29 Nov 2013 13:01:03 -0500 Original-Received: by pastel.home (Postfix, from userid 20848) id 41FF360EFA; Fri, 29 Nov 2013 13:01:03 -0500 (EST) In-Reply-To: <87zjon6vv8.fsf@rosalinde.fritz.box> (Stephen Berman's message of "Fri, 29 Nov 2013 17:00:43 +0100") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:81114 Archived-At: > 115272: Stefan Monnier 2013-11-28 Refine redisplay optimizations to only > redisplay *some* frames/windows Sounds highly likely, indeed. > 0. emacs -Q > 1. M-x display-time-mode > 3. C-x 2 (or C- x 3) > 4. C-x b, so one window displays *scratch* and the other *Messages*. > 5. When the displayed time changes, only the current buffer is updated; > in the other buffer the time display is unchanged, and the scroll bar > disappears (note my build does not use toolkit scroll bars, I don't > know if that makes a differences.) This states of affairs remains > until the non-updated buffer becomes current. - The mode-line not being redrawn in the other window is expected. The patch below should fix it. - But for some reason I couldn't reproduce it (looks like something somewhere in my tests is causing the extra redisplay needed). Ah, I could reproduce it by building --without-toolkit-scroll-bars, so it looks like the presence of toolkit scrollbars somehow plays an important role. - The scroll-bar disappearance is not expected. If the patch below makes this problem disappear, it's only because it hides it, not because it fixes it. Stefan === modified file 'lisp/time.el' --- lisp/time.el 2013-08-09 18:49:36 +0000 +++ lisp/time.el 2013-11-29 17:43:47 +0000 @@ -471,7 +471,7 @@ ;; This is inside the let binding, but we are not going to document ;; what variables are available. (run-hooks 'display-time-hook)) - (force-mode-line-update)) + (force-mode-line-update 'all)) (defun display-time-file-nonempty-p (file) (let ((remote-file-name-inhibit-cache (- display-time-interval 5)))