From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 117005 invoked by alias); 14 Dec 2016 20:07:00 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 116993 invoked by uid 89); 14 Dec 2016 20:06:59 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-0.4 required=5.0 tests=AWL,BAYES_00,KAM_LAZY_DOMAIN_SECURITY,RCVD_IN_DNSWL_NONE autolearn=no version=3.3.2 spammy=traced, 14122016, Braille, braille X-HELO: mout.kundenserver.de Received: from mout.kundenserver.de (HELO mout.kundenserver.de) (212.227.17.13) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Wed, 14 Dec 2016 20:06:57 +0000 Received: from [192.168.178.45] ([95.91.244.94]) by mrelayeu.kundenserver.de (mreue104 [212.227.15.183]) with ESMTPSA (Nemesis) id 0MLfvf-1cHWoA2OqR-000qtl; Wed, 14 Dec 2016 21:06:53 +0100 Subject: Re: mintty window gets tilde characters "pressed" in it To: cygwin@cygwin.com References: From: Thomas Wolff Message-ID: Date: Wed, 14 Dec 2016 20:07:00 -0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-UI-Out-Filterresults: notjunk:1;V01:K0:WnP7j28PuMg=:i3oTrRRzILMielyZe61S9s amsMWnWgoxQtY6Ewh/Go42vsGvUzpMTr0B+7R3Zt7fSaJS9TsAqZkxFFXez7FoB2/a1ontvBZ ni/adawAVXlSR/efXOgmKn6k6AUMQNE5NWXnDzuw9BV64MWnui32oGHr2cXMkp0iF0A9dvPZw SYX7tZ/FGnev7GhaNTqTYg4nX7PnSnTwWhwI7IHg83Hq+8ZMCVQu+HBf1o53GhNWNLD/3btds nmY5h/Y+q+QTLPl3vlCFl44aCPN3ZYahuBh73E8rXZG5qPCgPlxG8AJy6euJVmTF9qAvM757u hmXyvhhBnTPfLDxrFkmfaLo9KkIaKR7bpjORRzhqo4sgwPKw6KnIEBtwgve/y8ob9Q4qNvVg9 9T+zQNzqyl6qQl+LxBzP7eWPWfOydXNpW/HiS4qm+SwUWX6BmlcTuJdbtJkKEtwqtEJSMSsKI 62PDGK5Y/06pkDbrDjNE24ULKWcRhFaoHEK9Z7CAyY+mffRX6hfgDt84UK7vsznqvPz2tA5KB RcMCQjatyGOLXhyXTSf5KN1PfLcjjuMU9YkrqqOkdaCP+pMI0XkcB41ijbxTRAAetCM1QUoeF XXcOneJLZ7R2Vio4N2VR5FgJTFmPlpSrT9+wgS9WQs2dCPiAIlUL/lcpoGVOlrdgoaHrm3uik wfrp3KTRJTvAYeP0VcO0DsNsmURDmHrQ6cKZhRuQPTYPVroC9I3DrFmHUzhB8oPS8loWA5Z32 AyedTzz2tCQ5hakL X-IsSubscribed: yes X-SW-Source: 2016-12/txt/msg00159.txt.bz2 Am 14.12.2016 um 18:48 schrieb David Karr: > On Mon, Dec 12, 2016 at 10:18 AM, David Karr wrote: >> Win7. I believe my Cygwin version info is "2.5.2(0.297/5/3) 2016-06-23 14:29". >> >> I've been annoyed for a while with a symptom in my mintty windows. I >> will be typing along, or not, and suddenly a "~" character gets >> injected into the stream. It often is the only character at the >> prompt, so I can erase it and type my command, but it's really >> annoying when it appears while I'm typing. I was just reminded of it >> now when it injected the "~" right before I pressed enter on a >> "mkdir", so I had to then remove the dir I just created and recreate >> it. >> >> Is this something that Cygwin can control? > I've determined what "instigates" this, but I find that it only mainly > affects mintty and somewhat affects emacs. I've never seen a symptom > in any other application. > > I use a tool called "Windows Caffeine" that is used to keep the > display awake. It sends a "f15 key up" event every 59 seconds. That > is what is producing the "~" character in the mintty window. I've > also seen a symptom from this in Emacs, but it's harder to produce. > It's not as simple as just having a text buffer in focus. I haven't > been able to reliably produce it in Emacs, but the mintty symptom is > very reproducible. I've checked with Caffeine and traced mintty. It receives F15 key down, the key up. Caffeine claims to send key up only but that's not true. Please report this as a bug to Caffeine. X11 does not seem to handle F13...F24 at all because they don't appear on a typical PC keyboard (that's my assumption), so it doesn't occur in xterm. It generates a ~ only in terminal applications because a number of key escape sequences end with ~. The key event from Caffeine can be distinguished from a real key event, because it does not include keyboard scancode information. So a workaround is possible in theory. I'm not sure though whether that's a good idea as there may be other applications that inject keys the same way, e.g. drivers of other input devices, like Braille. Opinions and information are appreciated. ------ Thomas -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple