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Subject: bug#79892: 31.0.50; recursive-edit blocks input for frames on other X connections
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If you have multiple frames on different X connections, entering a
recursive edit on one of them will block input to all frames on the
other X connections.  Input is still possible for any frames on the same
X connection.

This happens both with actually different X servers, or with just
multiple connections to the same X server, as can happen by making
multiple "ssh -X" connections.  Which allows this simple recipe to
reproduce the issue:

1. emacs -Q --fg-daemon=test
2. ssh -X localhost emacsclient -c --socket-name=test
3. ssh -X localhost emacsclient -c --socket-name=test
4. M-: (recursive-edit) in one frame
5. Input in the other frame is blocked

This happens both --with-x-toolkit=lucid and --with-x-toolkit=gtk.


In GNU Emacs 31.0.50 (build 28, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.15.12, Xaw scroll bars) of 2025-11-19 built on
 igm-qws-u22796a
Repository revision: 6df5903f1a5b8360e1df94e5469668c6afccd7d8
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Rocky Linux 8.10 (Green Obsidian)

Configured using:
 'configure --with-x-toolkit=lucid --without-gpm --without-gconf
 --without-selinux --without-imagemagick --with-modules --with-gif=no
 --with-cairo --with-rsvg --without-compress-install --with-tree-sitter
 --enable-checking=yes,glyphs --enable-check-lisp-object-type
 'CFLAGS=-O0 -g3'
 PKG_CONFIG_PATH=/usr/local/home/garnish/libtree-sitter/0.22.6-1/lib/pkgconfig/'

Configured features:
CAIRO DBUS FREETYPE GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG LIBSYSTEMD
LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP
SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER X11 XDBE XIM
XINERAMA XINPUT2 XPM XRANDR LUCID ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  server-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-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
  minibuffer-nonselected-mode: t
  minibuffer-regexp-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug lisp-mnt message mailcap yank-media puny
dired dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg
rfc6068 epg-config gnus-util time-date mm-decode mm-bodies mm-encode
mailabbrev gmm-utils mailheader sendmail mail-parse rfc2231 rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils compile
text-property-search comint subr-x ansi-osc ansi-color ring comp-run
bytecomp byte-compile comp-common rx server warnings icons cl-loaddefs
cl-lib rmc iso-transl tooltip cconv eldoc paren electric uniquify
ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd touch-screen tool-bar dnd fontset image regexp-opt
fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode
register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors
frame minibuffer nadvice seq simple cl-generic indonesian philippine
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 composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure
cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
files window text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget keymap hashtable-print-readable backquote
threads dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo x-toolkit xinput2 x multi-tty move-toolbar
make-network-process tty-child-frames native-compile emacs)

Memory information:
((conses 16 92932 19290) (symbols 48 6980 0) (strings 32 29814 2550)
 (string-bytes 1 952636) (vectors 16 18477)
 (vector-slots 8 223110 8542) (floats 8 53 7) (intervals 56 395 0)
 (buffers 1064 12))

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Spencer Baugh <sbaugh@HIDDEN>
Subject: bug#79892: Acknowledgement (31.0.50; recursive-edit blocks input
 for frames on other X connections)
Message-ID: <handler.79892.B.176410263310743.ack <at> debbugs.gnu.org>
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Reply-To: 79892 <at> debbugs.gnu.org
Date: Tue, 25 Nov 2025 20:31:02 +0000

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79892: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D79892
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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#79892: 31.0.50; recursive-edit blocks input for frames on other X connections
Resent-From: Eli Zaretskii <eliz@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-gnu-emacs@HIDDEN
Resent-Date: Wed, 26 Nov 2025 13:04:02 +0000
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To: Spencer Baugh <sbaugh@HIDDEN>, Stefan Monnier <monnier@HIDDEN>
Cc: 79892 <at> debbugs.gnu.org, app-emacs-dev@HIDDEN
Date: Wed, 26 Nov 2025 15:02:32 +0200
Message-Id: <86cy55c5g7.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
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 (bug-gnu-emacs@HIDDEN)
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> Cc: app-emacs-dev@HIDDEN
> Date: Tue, 25 Nov 2025 14:18:11 -0500
> From:  Spencer Baugh via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
> 
> 
> If you have multiple frames on different X connections, entering a
> recursive edit on one of them will block input to all frames on the
> other X connections.  Input is still possible for any frames on the same
> X connection.
> 
> This happens both with actually different X servers, or with just
> multiple connections to the same X server, as can happen by making
> multiple "ssh -X" connections.  Which allows this simple recipe to
> reproduce the issue:
> 
> 1. emacs -Q --fg-daemon=test
> 2. ssh -X localhost emacsclient -c --socket-name=test
> 3. ssh -X localhost emacsclient -c --socket-name=test
> 4. M-: (recursive-edit) in one frame
> 5. Input in the other frame is blocked
> 
> This happens both --with-x-toolkit=lucid and --with-x-toolkit=gtk.

I think this is a known limitation/feature of recursive editing.  The
function does this:

  /* If we leave recursive_edit_1 below with a `throw' for instance,
     like it is done in the splash screen display, we have to
     make sure that we restore single_kboard as command_loop_1
     would have done if it were left normally.  */
  if (command_loop_level > 0)
    temporarily_switch_to_single_kboard (SELECTED_FRAME ());

Last modified: Wed, 26 Nov 2025 13:15:01 UTC

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Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.