From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#24746: parts of buffer become invisible Date: Thu, 20 Oct 2016 22:06:57 +0300 Message-ID: <83bmyeu9f2.fsf@gnu.org> References: <992268478.569568.1476982654894.ref@mail.yahoo.com> <992268478.569568.1476982654894@mail.yahoo.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1476990537 3682 195.159.176.226 (20 Oct 2016 19:08:57 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 20 Oct 2016 19:08:57 +0000 (UTC) Cc: 24746@debbugs.gnu.org To: Bob Krovetz Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Oct 20 21:08:53 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1bxIhg-000785-GN for geb-bug-gnu-emacs@m.gmane.org; Thu, 20 Oct 2016 21:08:36 +0200 Original-Received: from localhost ([::1]:56660 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxIhi-0000iY-LG for geb-bug-gnu-emacs@m.gmane.org; Thu, 20 Oct 2016 15:08:38 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:40440) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxIhC-00007D-Ig for bug-gnu-emacs@gnu.org; Thu, 20 Oct 2016 15:08:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bxIh8-0003U4-Iy for bug-gnu-emacs@gnu.org; Thu, 20 Oct 2016 15:08:06 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:55320) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1bxIh8-0003Ty-Fg for bug-gnu-emacs@gnu.org; Thu, 20 Oct 2016 15:08:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bxIh8-0000df-BR for bug-gnu-emacs@gnu.org; Thu, 20 Oct 2016 15:08:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 20 Oct 2016 19:08:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 24746 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 24746-submit@debbugs.gnu.org id=B24746.14769904452412 (code B ref 24746); Thu, 20 Oct 2016 19:08:02 +0000 Original-Received: (at 24746) by debbugs.gnu.org; 20 Oct 2016 19:07:25 +0000 Original-Received: from localhost ([127.0.0.1]:42486 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bxIgX-0000cp-M3 for submit@debbugs.gnu.org; Thu, 20 Oct 2016 15:07:25 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:49334) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bxIgW-0000cd-B2 for 24746@debbugs.gnu.org; Thu, 20 Oct 2016 15:07:24 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bxIgN-0003HC-7S for 24746@debbugs.gnu.org; Thu, 20 Oct 2016 15:07:19 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:50476) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxIgN-0003H3-3L; Thu, 20 Oct 2016 15:07:15 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:1774 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1bxIgM-0002AM-0E; Thu, 20 Oct 2016 15:07:14 -0400 In-reply-to: <992268478.569568.1476982654894@mail.yahoo.com> (message from Bob Krovetz on Thu, 20 Oct 2016 16:57:34 +0000 (UTC)) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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" Xref: news.gmane.org gmane.emacs.bugs:124742 Archived-At: > Date: Thu, 20 Oct 2016 16:57:34 +0000 (UTC) > From: Bob Krovetz > > I am using emacs 24.5.1 on Ubuntu 16.04. Sometimes parts of the buffer become invisible. For example, in > the minibuffer the part that represents the command and partial argument can become invisible, such as c-x > c-f failing to show "Find file: " and the directory string. In Perl I have found parts of the buffer that highlight > different components such as variable names or programming language words might also become invisible, > so the problem is not just about the minibuffer. The problem does not go away when using 'emacs -Q'. I used > to use an older version of Ubuntu that is no longer supported, and the problem started appearing after I > upgraded to 16.04. > > Can you help me understand what is happening, and what I might do to debug it? I started looking at overlays > and text properties, but I still don't understand them well enough. The characters can be seen when I > backspace over them. I cannot predict when the problem will occur, and the current remedy is to exit emacs > and start again. Look at the settings of your video driver. If there's some kind of "optimization" features there, turn them off and see if that helps.