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bug#29691: 25.3; Flashing characters in large window and large files


From: Sven Fischer
Subject: bug#29691: 25.3; Flashing characters in large window and large files
Date: Wed, 13 Dec 2017 14:30:57 +0100

Hello,

I have the problem that parts of the edited files are flashing
significantly. This occurs especially when using large windows. It is
reproducable, but not always observable. I could not figure out, what
exactly is triggering the behaviour. I try to attach a screen recording
showing the error for reference. In the video I do nothing, pure emacs idling 
on a nxml file.

Regards,
Sven

In GNU Emacs 25.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.19)
 of 2017-09-16 built on juergen
Windowing system distributor 'The X.Org Foundation', version 11.0.11905000
System Description:     Manjaro Linux

Configured using:
 'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=gtk3 --with-xft --with-modules
 'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong
 -fno-plt' CPPFLAGS=-D_FORTIFY_SOURCE=2
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 MODULES

Important settings:
  value of $LC_MONETARY: de_DE.UTF-8
  value of $LC_NUMERIC: de_DE.UTF-8
  value of $LC_TIME: de_DE.UTF-8
  value of $LANG: de_DE.UTF-8
  locale-coding-system: utf-8-unix

Major mode: nXML

Minor modes in effect:
  diff-auto-refine-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Using vacuous schema
Please type y, n, or !: !
(New file)
Saving file /tmp/.emacs...
Wrote /tmp/.emacs [2 times]

Load-path shadows:
/usr/share/emacs/site-lisp/flim/hex-util hides /usr/share/emacs/25.3/lisp/hex-
util
/usr/share/emacs/site-lisp/flim/md4 hides /usr/share/emacs/25.3/lisp/md4
/usr/share/emacs/site-lisp/flim/ntlm hides /usr/share/emacs/25.3/lisp/net/ntlm
/usr/share/emacs/site-lisp/flim/sasl-cram hides /usr/share/emacs/25.3/lisp/net/
sasl-cram
/usr/share/emacs/site-lisp/flim/hmac-def hides /usr/share/emacs/25.3/lisp/net/
hmac-def
/usr/share/emacs/site-lisp/flim/hmac-md5 hides /usr/share/emacs/25.3/lisp/net/
hmac-md5
/usr/share/emacs/site-lisp/flim/sasl-ntlm hides /usr/share/emacs/25.3/lisp/net/
sasl-ntlm
/usr/share/emacs/site-lisp/flim/sasl hides /usr/share/emacs/25.3/lisp/net/sasl
/usr/share/emacs/site-lisp/flim/sasl-digest hides /usr/share/emacs/25.3/lisp/
net/sasl-digest
/usr/share/emacs/site-lisp/semi/smime hides /usr/share/emacs/25.3/lisp/gnus/
smime
/usr/share/emacs/site-lisp/semi/pgg-def hides /usr/share/emacs/25.3/lisp/
obsolete/pgg-def
/usr/share/emacs/site-lisp/semi/pgg-parse hides /usr/share/emacs/25.3/lisp/
obsolete/pgg-parse
/usr/share/emacs/site-lisp/semi/pgg-gpg hides /usr/share/emacs/25.3/lisp/
obsolete/pgg-gpg
/usr/share/emacs/site-lisp/semi/pgg-pgp5 hides /usr/share/emacs/25.3/lisp/
obsolete/pgg-pgp5
/usr/share/emacs/site-lisp/semi/pgg hides /usr/share/emacs/25.3/lisp/obsolete/
pgg
/usr/share/emacs/site-lisp/semi/pgg-pgp hides /usr/share/emacs/25.3/lisp/
obsolete/pgg-pgp

Features:
(shadow sort mail-extr emacsbug message idna dired format-spec rfc822
mml mml-sec password-cache epg epg-config gnus-util mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode mail-prsvr
mail-utils vc-git diff-mode easy-mmode pp cus-edit cus-start cus-load
wid-edit cl-loaddefs pcase cl-lib nxml-uchnm rng-xsd xsd-regexp
rng-cmpct rng-nxml rng-valid rng-loc rng-uri rng-parse nxml-parse
rng-match rng-dt rng-util rng-pttrn nxml-ns easymenu nxml-mode
nxml-outln nxml-rap nxml-util nxml-glyph nxml-enc xmltok time-date
mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd fontset
image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cl-generic cham
georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote dbusbind inotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)

 (miscs 40 87 90)
 (strings 32 23950 4973)

-- 
Sven Fischer -- Platzer Höhenweg 34, 51429 Bergisch Gladbach, Germany
                Tel: +49-(0)2204-480985, Fax: +49-(0)2204-9670019
                sven@leiderfischer.de

Attachment: emacs-flashing-chars.ogg
Description: video/theora


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