From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.bugs Subject: bug#20432: GDK_SCALE=2 GDK_DPI_SCALE=0.5 destroys GTK+ 3 scroll bar Date: Thu, 14 May 2015 09:38:19 -0700 Organization: UCLA Computer Science Department Message-ID: <5554CF7B.7090306@cs.ucla.edu> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1431621561 30368 80.91.229.3 (14 May 2015 16:39:21 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 14 May 2015 16:39:21 +0000 (UTC) Cc: "Felix E. Klee" , 20432@debbugs.gnu.org To: Jan =?UTF-8?Q?Dj=C3=A4rv?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu May 14 18:39:10 2015 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 1YswAA-0008MW-98 for geb-bug-gnu-emacs@m.gmane.org; Thu, 14 May 2015 18:39:10 +0200 Original-Received: from localhost ([::1]:55805 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YswA9-0007X6-Hv for geb-bug-gnu-emacs@m.gmane.org; Thu, 14 May 2015 12:39:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50695) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YswA6-0007Wo-KA for bug-gnu-emacs@gnu.org; Thu, 14 May 2015 12:39:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YswA2-000627-Jg for bug-gnu-emacs@gnu.org; Thu, 14 May 2015 12:39:06 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:35298) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YswA2-00061s-GN for bug-gnu-emacs@gnu.org; Thu, 14 May 2015 12:39:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1YswA2-00046G-3q for bug-gnu-emacs@gnu.org; Thu, 14 May 2015 12:39:02 -0400 X-Loop: help-debbugs@gnu.org In-Reply-To: Resent-From: Paul Eggert Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 14 May 2015 16:39:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 20432 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 20432-submit@debbugs.gnu.org id=B20432.143162151215688 (code B ref 20432); Thu, 14 May 2015 16:39:02 +0000 Original-Received: (at 20432) by debbugs.gnu.org; 14 May 2015 16:38:32 +0000 Original-Received: from localhost ([127.0.0.1]:45273 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Ysw9X-00044x-Tj for submit@debbugs.gnu.org; Thu, 14 May 2015 12:38:32 -0400 Original-Received: from smtp.cs.ucla.edu ([131.179.128.62]:51807) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Ysw9W-00044W-13 for 20432@debbugs.gnu.org; Thu, 14 May 2015 12:38:30 -0400 Original-Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp.cs.ucla.edu (Postfix) with ESMTP id BCA9AA60001; Thu, 14 May 2015 09:38:23 -0700 (PDT) X-Virus-Scanned: amavisd-new at smtp.cs.ucla.edu Original-Received: from smtp.cs.ucla.edu ([127.0.0.1]) by localhost (smtp.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nun7IWbYsLGx; Thu, 14 May 2015 09:38:23 -0700 (PDT) Original-Received: from Penguin.CS.UCLA.EDU (Penguin.CS.UCLA.EDU [131.179.64.200]) by smtp.cs.ucla.edu (Postfix) with ESMTPSA id 5337F39E8015; Thu, 14 May 2015 09:38:23 -0700 (PDT) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 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:102796 Archived-At: Thanks, Jan D., for looking into the problem. It does appear to be a mess. In theory I suppose Emacs should use gdk_screen_get_monitor_scale_factor to get the monitor scale factor; but in practice the situation is so messed up (and a lot of work would be needed to fix it) that it might not be worth bothering. By the way, on my Fedora 21 x86-64 host, setting GDK_SCALE=2 GDK_DPI_SCALE=0.5 has no effect on emacs -Q, even with the recent fixes. Perhaps this is due to the races you mentioned? I installed a minor followup patch to catch some integer overflows (I realize GTK+ can crash in those cases and that other integer overflows are possible in Emacs, but one thing at a time....).