From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Display updates strangely - extra text appears and then disappears Date: Sun, 26 Mar 2017 20:24:10 +0300 Message-ID: <837f3c9cjp.fsf@gnu.org> References: <874lyg14vk.fsf@tullinup.koldfront.dk> <83inmw9ib4.fsf@gnu.org> <878tnsghdr.fsf@tullinup.koldfront.dk> <83bmso9eqc.fsf@gnu.org> <87y3vst1us.fsf@tullinup.koldfront.dk> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1490549066 6779 195.159.176.226 (26 Mar 2017 17:24:26 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 26 Mar 2017 17:24:26 +0000 (UTC) Cc: emacs-devel@gnu.org To: asjo@koldfront.dk (Adam =?utf-8?Q?Sj=C3=B8gren?=) Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Mar 26 19:24:22 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1csBto-0000rq-KP for ged-emacs-devel@m.gmane.org; Sun, 26 Mar 2017 19:24:16 +0200 Original-Received: from localhost ([::1]:41718 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1csBtu-0001y3-BY for ged-emacs-devel@m.gmane.org; Sun, 26 Mar 2017 13:24:22 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57212) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1csBto-0001xw-Gd for emacs-devel@gnu.org; Sun, 26 Mar 2017 13:24:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1csBtk-0001bw-IR for emacs-devel@gnu.org; Sun, 26 Mar 2017 13:24:16 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:41424) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1csBtk-0001bs-FJ; Sun, 26 Mar 2017 13:24:12 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:2935 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1csBtj-000230-PW; Sun, 26 Mar 2017 13:24:12 -0400 In-reply-to: <87y3vst1us.fsf@tullinup.koldfront.dk> (asjo@koldfront.dk) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:213379 Archived-At: > From: asjo@koldfront.dk (Adam Sjøgren) > Date: Sun, 26 Mar 2017 18:54:51 +0200 > > Eli writes: > > > Thanks. I followed the recipe, but my display is not messed up as you > > describe. > > I guess our environments differs in some aspect. Is there anything I > should check? I have no idea what could be responsible for the differences in behavior. > > Could you perhaps try the recipe after disabling double-buffering, > > like this: > > > > M-: (modify-frame-parameters nil '((inhibit-double-buffering . t))) RET > > > > If you repeat the recipe after evaluating the above, does the problem > > still appear? > > The problem still appears after doing that. OK. > I just found a simpler recipe to reproduce the problem: > > * Start emacs -Q > * Split the window in two: C-x 2 > * Unsplit it: C-x 1 > > The text in the *scratch* buffer is repeated after where the line should > end: > > · https://koldfront.dk/misc/gnu-emacs/redisplay-simple.png Doesn't happen here, either. I need to test an alternative solution for the bug whose fix seems to be causing this.