Your message dated Mon, 06 Jul 2026 17:27:27 +0000
with message-id <[email protected]>
and subject line Bug#1134791: fixed in im-config 1.0
has caused the Debian Bug report #1134791,
regarding im-config: im-launch passes empty LC_CTYPE to phase2 check, causing
fcitx5 auto selection to mismatch and daemon not to start
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1134791: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1134791
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: im-config
Version: 0.62
Severity: normal
X-Debbugs-Cc: [email protected]
Dear Maintainer,
I am seeing a startup failure with im-config 0.62 where the first Xsession
phase selects fcitx5 correctly, but the im-launch phase2 safety check computes
a different automatic input method and therefore refuses to start the fcitx5
daemon.
This was observed on Ubuntu Kylin 26.04 with im-config 0.62, but the code path
is in the Debian im-config scripts as well. I am reporting it here because the
problem appears to be in im-launch's clean-environment phase2 check.
Observed behavior
=================
The session is an X11 UKUI session with zh_CN.UTF-8 as the main locale:
XDG_SESSION_TYPE=x11
DESKTOP_SESSION=ukui
XDG_SESSION_DESKTOP=ukui
XDG_CURRENT_DESKTOP=UKUI
LANG=zh_CN.UTF-8
At login, /etc/X11/Xsession.d/70im-config_launch runs phase1 and selects
fcitx5:
im-config: Set environment variables from
/etc/X11/Xsession.d/70im-config_launch (all empty strings)
im-config: @ IM_CONFIG_PHASE='1'
im-config: echo_auto_selected_im: im='fcitx5' for not_GNOME and CJK for
IM_CONFIG_PREFERRED='fcitx5'
im-config: run_im: source 'fcitx5.rc'.
im-config: >>> GTK_IM_MODULE='fcitx' QT_IM_MODULE='fcitx'
CLUTTER_IM_MODULE='xim' SDL_IM_MODULE='fcitx' XMODIFIERS='@im=fcitx'
Then im-launch starts from /etc/X11/Xsession.d/99x11-common_start and runs its
phase2 comparison. The clean-environment subshell selects ibus instead:
im-config: @ IM_CONFIG_ENTRY='xsession-im-launch' XDG_SESSION_TYPE ='x11'
im-config: GTK_IM_MODULE='fcitx' QT_IM_MODULE='fcitx'
CLUTTER_IM_MODULE='xim' SDL_IM_MODULE='fcitx' XMODIFIERS='@im=fcitx'
im-config: BEGIN for xsession-im-launch * x11
(/etc/X11/Xsession.d/99x11-common_start)
im-config: @ IM_CONFIG_ENTRY='subshell' XDG_SESSION_TYPE ='x11'
im-config: GTK_IM_MODULE='' QT_IM_MODULE='' CLUTTER_IM_MODULE=''
SDL_IM_MODULE='' XMODIFIERS=''
im-config: @ IM_CONFIG_PHASE='1'
im-config: echo_auto_selected_im:
im=$(echo_highest_priority_installed_im) for not_GNOME and not_CJKV
im-config: echo_highest_priority_installed_im 'ibus'
im-config: run_im: source 'ibus.rc'.
im-config: >>> GTK_IM_MODULE='ibus' QT_IM_MODULE='ibus'
CLUTTER_IM_MODULE='ibus' SDL_IM_MODULE='' XMODIFIERS='@im=ibus'
im-config: Don't start daemon from /etc/X11/Xsession.d/99x11-common_start
(variables changed from /etc/X11/Xsession.d/70im-config_launch)
As a result, the phase2 branch in /usr/share/im-config/data/23_fcitx5.rc is not
reached, so /usr/bin/fcitx5 -d is not started by im-config.
I temporarily added logging to 23_fcitx5.rc and confirmed it was only run with
IM_CONFIG_PHASE=1:
2026-04-24 13:47:09 23_fcitx5.rc: before phase2 check, IM_CONFIG_PHASE=1
2026-04-24 13:47:09 23_fcitx5.rc: after phase2 check, IM_CONFIG_PHASE=1
Expected behavior
=================
The im-launch phase2 check should compute the same automatic input method as
phase1 when the relevant session and locale inputs have not changed. In this
case both phase1 and the im-launch subshell should select fcitx5, and im-launch
should then start /usr/bin/fcitx5 -d.
Actual behavior
===============
phase1 selects fcitx5, but the im-launch clean-environment subshell selects
ibus. im-launch treats this as an environment mismatch and refuses to run the
phase2 daemon startup code.
Likely cause
============
In /usr/bin/im-launch, the clean environment is created with entries like:
LANG="$LANG" \
LANGUAGE="$LANGUAGE" \
LC_ALL="$LC_ALL" \
LC_CTYPE="$LC_CTYPE" \
If LC_CTYPE is unset or empty in the parent environment, this still passes an
explicit empty LC_CTYPE variable to the subshell. That empty LC_CTYPE overrides
LANG for im-config's locale detection in xinputrc.common:
IM_CONFIG_LC_CTYPE=$(locale | sed -nr 's/LC_CTYPE=\"?([a-zA-Z_]*).*/\1/p')
Minimal reproduction of that specific locale issue:
$ env -i LANG=zh_CN.UTF-8 LC_CTYPE= locale | sed -nr
's/LC_CTYPE=\"?([a-zA-Z_]*).*/LC_CTYPE parsed: \1/p'
LC_CTYPE parsed:
$ env -i LANG=zh_CN.UTF-8 locale | sed -nr
's/LC_CTYPE=\"?([a-zA-Z_]*).*/LC_CTYPE parsed: \1/p'
LC_CTYPE parsed: zh_CN
The same difference changes im-config's auto selection:
$ env -i HOME="$HOME" LANG=zh_CN.UTF-8 LANGUAGE= XDG_SESSION_TYPE=x11
XDG_SESSION_DESKTOP=ukui XDG_CURRENT_DESKTOP=UKUI DESKTOP_SESSION=ukui
IM_CONFIG_ENTRY=subshell IM_CONFIG_PHASE=1 sh -c '.
/usr/share/im-config/initializer; . /usr/share/im-config/im-config_setting;
printf "%s\n" "$GTK_IM_MODULE $QT_IM_MODULE $CLUTTER_IM_MODULE $SDL_IM_MODULE
$XMODIFIERS"'
fcitx fcitx xim fcitx @im=fcitx
$ env -i HOME="$HOME" LANG=zh_CN.UTF-8 LANGUAGE= LC_CTYPE=
XDG_SESSION_TYPE=x11 XDG_SESSION_DESKTOP=ukui XDG_CURRENT_DESKTOP=UKUI
DESKTOP_SESSION=ukui IM_CONFIG_ENTRY=subshell IM_CONFIG_PHASE=1 sh -c '.
/usr/share/im-config/initializer; . /usr/share/im-config/im-config_setting;
printf "%s\n" "$GTK_IM_MODULE $QT_IM_MODULE $CLUTTER_IM_MODULE $SDL_IM_MODULE
$XMODIFIERS"'
ibus ibus ibus @im=ibus
Suggested direction
===================
Please avoid injecting empty locale variables into the env -i subshell in
im-launch. For example, LC_ALL and LC_CTYPE could be omitted when they are
empty, or LC_CTYPE could fall back to LANG when unset/empty, so that locale(1)
inside the subshell sees the same effective LC_CTYPE as phase1.
System/package information
==========================
im-config 0.62
fcitx5 5.1.19-1
ibus 1.5.34~rc2-1
x11-common 1:7.7+26ubuntu1
gettext-base 0.23.2-1
Distribution/flavour: Ubuntu Kylin 26.04
lsb_release output:
Distributor ID: Ubuntu
Description: Ubuntu 26.04 LTS
Release: 26.04
Codename: resolute
Linux kylin-A7S-E3 7.0.0-14-generic #14-Ubuntu SMP PREEMPT_DYNAMIC Mon Apr
13 11:09:53 UTC 2026 x86_64 GNU/Linux
Regards,
zhangpan
-- System Information:
Debian Release: forky/sid
APT prefers resolute
APT policy: (500, 'resolute')
Architecture: amd64 (x86_64)
Kernel: Linux 7.0.0-14-generic (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=zh_CN.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set
to C.UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
--- End Message ---
--- Begin Message ---
Source: im-config
Source-Version: 1.0
Done: Osamu Aoki <[email protected]>
We believe that the bug you reported is fixed in the latest version of
im-config, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Osamu Aoki <[email protected]> (supplier of updated im-config package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Tue, 07 Jul 2026 02:01:46 +0900
Source: im-config
Architecture: source
Version: 1.0
Distribution: unstable
Urgency: medium
Maintainer: Debian Input Method Team <[email protected]>
Changed-By: Osamu Aoki <[email protected]>
Closes: 1112639 1134791 1141583
Changes:
im-config (1.0) unstable; urgency=medium
.
* Major code refactor with cleaner logic
(Closes: #1141583, #1134791)
* Remove old unsuccessful artifacts accumulated to support Wayland.
* No more root operation.
* Skip IBUS_ENABLE_SYNC_MODE (Closes: #1112639)
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Files:
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d1c64c955153e6bd559f9b2d69d209fc 36072 utils optional im-config_1.0.tar.xz
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