bug#51491: 24.3; Text jumping/flashing with upgrade to RHEL 7.9

[Davis, Malcolm]

We just recently upgraded to RedHat Enterprise Linux 7.9 which comes

with emacs 24.3.1.  The screen is not redrawing itself correctly.  For

example, text that should get cleared is not necessarily going away when

changing buffers or scrolling.  Then at times portions of the screen

will redraw spontaneously causing will redraw spontaneously,

repositioning text and then putting it back again, resulting in massive

flashing.  For what it is worth we are using KDE as our window manager.

If I can provide any additional information, please let me know.

Thanks,

Malcolm Davis

In GNU Emacs 24.3.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.22.30)

 of 2019-11-01 on x86-vm-21.build.eng.bos.redhat.com

Windowing system distributor `The X.Org Foundation', version 11.0.12004000

System Description: Red Hat Enterprise Linux Workstation release 7.9 (Maipo)

Configured using:

 `configure '--build=x86_64-redhat-linux-gnu'

 '--host=x86_64-redhat-linux-gnu' '--program-prefix='

 '--disable-dependency-tracking' '--prefix=/usr' '--exec-prefix=/usr'

 '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc'

 '--datadir=/usr/share' '--includedir=/usr/include'

 '--libdir=/usr/lib64' '--libexecdir=/usr/libexec'

 '--localstatedir=/var' '--sharedstatedir=/var/lib'

 '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--with-dbus'

 '--with-gif' '--with-jpeg' '--with-png' '--with-rsvg' '--with-tiff'

 '--with-xft' '--with-xpm' '--with-x-toolkit=gtk3' '--with-gpm=no'

 'build_alias=x86_64-redhat-linux-gnu'

 'host_alias=x86_64-redhat-linux-gnu' 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g

 -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions

 -fstack-protector-strong --param=ssp-buffer-size=4

 -grecord-gcc-switches -m64 -mtune=generic' 'LDFLAGS=-Wl,-z,relro ''

Important settings:

  value of $LC_ALL: C

  value of $LANG: en_US

  locale-coding-system: nil

  default enable-multibyte-characters: t

Major mode: Shell

Minor modes in effect:

  show-paren-mode: t

  shell-dirtrack-mode: t

  tooltip-mode: t

  mouse-wheel-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 input:

<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-movement>

<mouse-1> <f12> l s <return> C-l <down-mouse-1> <mouse-1>

C-l <escape> < C-x C-f s r c / U G <tab> p l <tab>

s c <tab> <return> C-x C-f d e <tab> <return> <down-mouse-1>

<mouse-1> C-x C-f <backspace> <return> C-x C-v ~ <return>

C-l C-l C-l C-l C-l C-l <escape> > <prior> <prior>

C-l C-l C-l C-l <help-echo> <help-echo> <help-echo>

<help-echo> C-g C-g C-l C-x C-c C-g <f12> <escape>

> C-d <down-mouse-1> <mouse-movement> <mouse-1> C-g

C-g <down-mouse-1> <mouse-1> M-x r e p o r t - e m

a c s - b u g <return>

Recent messages:

Loading /ap/emacs/site-lisp/python-outline.el (source)...done

Loading `python-mode': old-style backquotes detected!

Local value of py-indent-offset set to 4

Using the CPython shell

Loading vc-git...done

Mark set

Quit [2 times]

(No files need saving)

Quit

Mark set

Quit [2 times]

Load-path shadows:

/ap/emacs/site-lisp/default hides /usr/share/emacs/site-lisp/default

Features:

(shadow sort mail-extr emacsbug message cl-macs gv rfc822 mml mml-sec

mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils

mailheader sendmail rfc2047 rfc2045 ietf-drums mail-utils vc-git imenu

noutline outline easy-mmode python-mode easymenu cl dired jka-compr

uniquify warnings paren delsel cus-start cus-load edmacro kmacro

preview-latex tramp tramp-compat auth-source eieio byte-opt bytecomp

byte-compile cconv gnus-util mm-util mail-prsvr password-cache

tramp-loaddefs shell pcomplete comint ansi-color ring format-spec advice

help-fns cl-lib advice-preload tex-site auto-loads time-date tooltip

ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd

fontset image regexp-opt fringe tabulated-list newcomment lisp-mode

register page menu-bar rfn-eshadow timer select scroll-bar mouse

jit-lock font-lock syntax facemenu font-core frame cham georgian

utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean

japanese hebrew greek romanian slovak czech european ethiopic indian

cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev

minibuffer loaddefs button faces cus-face macroexp files text-properties

overlay sha1 md5 base64 format env code-pages mule custom widget

hashtable-print-readable backquote make-network-process dbusbind

dynamic-setting system-font-setting font-render-setting move-toolbar gtk

x-toolkit x multi-tty emacs)

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