Switch input group won't auto trigger on key release for XWayland apps on Gnome

[gky99]

Summary

After enumerating the input methods group, the selected group won't be automatically activated on key release. I have to press shift key to finalize the selection.
This bug only happens on Gnome Wayland, and only for XWayland apps.

I've tested several apps:
Chrome (Xwayland): not auto activated
Chrome (Wayland): auto activated
gnome-text-edi (Wayland): auto activated
jetbrain-ide (Xwayland): not auto activated
vscode (XWayland): not auto activated

The same set of apps are also tested on KDE, and there is no such issue.

Steps to Reproduce

1. Create two input method groups
2. Set hotkey to enumerate input method groups
3. Open an Xwayland app (like vscode)
4. Type something to check you are on first group
5. Use hotkey to switch to another group. You should see a notification says you switch to second group.
6. Type something and you are sill on first group.
7. Press shift. You should see a notification says you switched to second group.
8. Type and you are actually switched

Expected Behavior

1. Create two input method groups
2. Set hotkey to enumerate input method groups
3. Open an Xwayland app (like vscode)
4. Type something to check you are on first group
5. Use hotkey to switch to another group. You should see a notification says you switch to second group. When you release your hotkey, you should see another notification says you switched to second group.
6. Type and you are actually switched

Output of fcitx5-diagnose command

System Info:

1. uname -a:

   Linux gky-Ubuntu 6.11.0-17-generic #17~24.04.2-Ubuntu SMP PREEMPT_DYNAMIC Mon Jan 20 22:48:29 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
   

2. lsb_release -a:

   Distributor ID:	Ubuntu
   Description:	Ubuntu 24.04.2 LTS
   Release:	24.04
   Codename:	noble
   

3. lsb_release -d:

   Description:	Ubuntu 24.04.2 LTS
   

4. /etc/lsb-release:

   DISTRIB_ID=Ubuntu
   DISTRIB_RELEASE=24.04
   DISTRIB_CODENAME=noble
   DISTRIB_DESCRIPTION="Ubuntu 24.04.2 LTS"
   

5. /etc/os-release:

   PRETTY_NAME="Ubuntu 24.04.2 LTS"
   NAME="Ubuntu"
   VERSION_ID="24.04"
   VERSION="24.04.2 LTS (Noble Numbat)"
   VERSION_CODENAME=noble
   ID=ubuntu
   ID_LIKE=debian
   HOME_URL="https://www.ubuntu.com/"
   SUPPORT_URL="https://help.ubuntu.com/"
   BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
   PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
   UBUNTU_CODENAME=noble
   LOGO=ubuntu-logo
   

6. Desktop Environment:

   Desktop environment is gnome3.

7. XDG SESSION TYPE:

   XDG_SESSION_TYPE='wayland'
   

8. Bash Version:

   BASH_VERSION='5.2.21(1)-release'
   

Environment:

1. DISPLAY:

   DISPLAY=':0'
   
   
   WAYLAND_DISPLAY='wayland-0'
   

2. Keyboard Layout:

   1. setxkbmap:

      WARNING: Running setxkbmap against an Xwayland server
      xkb_keymap {
      	xkb_keycodes  { include "evdev+aliases(qwerty)"	};
      	xkb_types     { include "complete"	};
      	xkb_compat    { include "complete"	};
      	xkb_symbols   { include "pc+us(dvp)+inet(evdev)"	};
      	xkb_geometry  { include "pc(pc105)"	};
      };
      

   2. xprop:

      _XKB_RULES_NAMES(STRING) = "evdev", "pc105", "us", "dvp", ""
      

3. Locale:

   1. All locales:

      C
      C.utf8
      en_AG
      en_AG.utf8
      en_AU.utf8
      en_BW.utf8
      en_CA.utf8
      en_DK.utf8
      en_GB.utf8
      en_HK.utf8
      en_IE.utf8
      en_IL
      en_IL.utf8
      en_IN
      en_IN.utf8
      en_NG
      en_NG.utf8
      en_NZ.utf8
      en_PH.utf8
      en_SG.utf8
      en_US.utf8
      en_ZA.utf8
      en_ZM
      en_ZM.utf8
      en_ZW.utf8
      POSIX
      

   2. Current locale:

      LANG=en_US.UTF-8
      LANGUAGE=
      LC_CTYPE="en_US.UTF-8"
      LC_NUMERIC="en_US.UTF-8"
      LC_TIME="en_US.UTF-8"
      LC_COLLATE="en_US.UTF-8"
      LC_MONETARY="en_US.UTF-8"
      LC_MESSAGES="en_US.UTF-8"
      LC_PAPER="en_US.UTF-8"
      LC_NAME="en_US.UTF-8"
      LC_ADDRESS="en_US.UTF-8"
      LC_TELEPHONE="en_US.UTF-8"
      LC_MEASUREMENT="en_US.UTF-8"
      LC_IDENTIFICATION="en_US.UTF-8"
      LC_ALL=
      

4. Directories:

   1. Home:

      /home/gky
      

   2. ${XDG_CONFIG_HOME}:

      Environment variable XDG_CONFIG_HOME is not set.

      Current value of XDG_CONFIG_HOME is ~/.config (/home/gky/.config).

   3. Fcitx5 Settings Directory:

      Current fcitx5 settings directory is ~/.config/fcitx5 (/home/gky/.config/fcitx5).

5. Current user:

   The script is run as gky (1000).

Fcitx State:

1. executable:

   Found fcitx5 at /usr/bin/fcitx5.

2. version:

   Fcitx version: 5.1.7

3. process:

   Found 1 fcitx5 process:

      2619 fcitx5
   

4. fcitx5-remote:

   fcitx5-remote works properly.

5. DBus interface:

   Using dbus-send to check dbus.

   Owner of DBus name org.fcitx.Fcitx5 is :1.95.

   PID of DBus name org.fcitx.Fcitx5 owner is 2619.

   Debug information from dbus:

      Group [wayland:] has 1 InputContext(s)
     IC [edc4a3d927f64185856aa999bc771d19] program: frontend:ibus cap:52 focus:0
   Group [x11::0] has 7 InputContext(s)
     IC [5b0c8faed9104680ab4ec599f427eddc] program:pycharm frontend:xim cap:4000000000 focus:0
     IC [82ab8ad69a4e4a76b0a7eb33f1268036] program: frontend:xim cap:4000000000 focus:0
     IC [9315147ccba04c35b5b767f932e217cd] program:guake frontend:dbus cap:6000000032 focus:1
     IC [14663822157646eaa2c660c0b268e1ae] program:guake frontend:dbus cap:6000000032 focus:0
     IC [be8e1134c2c44b9dabe4cdaaa0a1bded] program:guake frontend:dbus cap:6000000032 focus:0
     IC [0d35fb9b0391445e8cf0c7a43c391abb] program:guake frontend:dbus cap:6000000032 focus:0
     IC [9b86dbb0fb3e45f68fbcf3e64d87e524] program:guake frontend:dbus cap:6000000032 focus:0
   Input Context without group
   

Fcitx Configure UI:

1. Config Tool Wrapper:

   Found fcitx5-configtool at /usr/bin/fcitx5-configtool.

2. Config GUI for qt:

   Found fcitx5-config-qt at /usr/bin/fcitx5-config-qt.

3. Config GUI for kde:

   kcmshell5 not found.

Frontends setup:

The environment variable checked by this script only shows the environment under current shell. It is still possible that you did not set the environment to the whole graphic desktop session. You may inspect the actual environment variable of a certain process by using xargs -0 -L1 /proc/$PID/environ for a certain process that you find not working.

Xim:

1. ${XMODIFIERS}:

   Environment variable XMODIFIERS is set to "@im=fcitx" correctly.
   Xim Server Name from Environment variable is fcitx.

2. XIM_SERVERS on root window:

   Xim server name is the same with that set in the environment variable.

Qt:

1. qt4 - ${QT4_IM_MODULE}:

   Environment variable QT_IM_MODULE is set to "fcitx" correctly.

   fcitx5-qt4-immodule-probing not found.

2. qt5 - ${QT_IM_MODULE}:

   Environment variable QT_IM_MODULE is set to "fcitx" correctly.

   Using fcitx5-qt5-immodule-probing to check the actual im module to be used under current environment:

   QT_QPA_PLATFORM=wayland
   QT_IM_MODULE=fcitx
   IM_MODULE_CLASSNAME=fcitx::QFcitxPlatformInputContext
   

3. qt6 - ${QT_IM_MODULE}:

   Environment variable QT_IM_MODULE is set to "fcitx" correctly.

   Using fcitx5-qt6-immodule-probing to check the actual im module to be used under current environment:

   QT_QPA_PLATFORM=wayland
   QT_IM_MODULE=fcitx
   IM_MODULE_CLASSNAME=fcitx::QFcitxPlatformInputContext
   

4. Qt IM module files:

   Found fcitx5 im module for qt5: /lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitx5platforminputcontextplugin.so.
   Found fcitx5 im module for qt6: /lib/x86_64-linux-gnu/qt6/plugins/platforminputcontexts/libfcitx5platforminputcontextplugin.so.
   Found fcitx5 qt6 module: /lib/x86_64-linux-gnu/fcitx5/qt6/libfcitx-quickphrase-editor5.so.

   Following error may not be accurate because guessing Qt version from path depends on how your distribution packages Qt. It is not a critical error if you do not use any Qt application with certain version of Qt or you are using text-input support by Qt under Wayland.
   Cannot find fcitx5 input method module for Qt4.

Gtk:

1. gtk - ${GTK_IM_MODULE}:

   Environment variable GTK_IM_MODULE is set to "fcitx" correctly.

   Using fcitx5-gtk2-immodule-probing to check the actual im module to be used under current environment:

   GTK_IM_MODULE=fcitx
   

   Using fcitx5-gtk3-immodule-probing to check the actual im module to be used under current environment:

   GTK_IM_MODULE=fcitx
   

   Using fcitx5-gtk4-immodule-probing to check the actual im module to be used under current environment:

   GTK_IM_MODULE=fcitx
   

2. gtk-query-immodules:

   1. gtk 2:

      Cannot find gtk-query-immodules for gtk 2

      Cannot find fcitx5 im module for gtk 2.

   2. gtk 3:

      Cannot find gtk-query-immodules for gtk 3

      Cannot find fcitx5 im module for gtk 3.

3. Gtk IM module cache:

   1. gtk 2:

      Found immodules cache for gtk 2.24.33 at /lib/x86_64-linux-gnu/gtk-2.0/2.10.0/immodules.cache.
      Version Line:

      # Created by /usr/lib/x86_64-linux-gnu/libgtk2.0-0t64/gtk-query-immodules-2.0 from gtk+-2.24.33
      

      Found fcitx5 im modules for gtk 2.24.33.

      "/usr/lib/x86_64-linux-gnu/gtk-2.0/2.10.0/immodules/im-fcitx5.so" 
      "fcitx" "Fcitx5 (Flexible Input Method Framework5)" "fcitx5" "/usr/locale" "ja:ko:zh:*" 
      "fcitx5" "Fcitx5 (Flexible Input Method Framework5)" "fcitx5" "/usr/locale" "ja:ko:zh:*" 
      

   2. gtk 3:

      Found immodules cache for gtk 3.24.41 at /lib/x86_64-linux-gnu/gtk-3.0/3.0.0/immodules.cache.
      Version Line:

      # Created by /usr/lib/x86_64-linux-gnu/libgtk-3-0t64/gtk-query-immodules-3.0 from gtk+-3.24.41
      

      Found fcitx5 im modules for gtk 3.24.41.

      "/usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/immodules/im-fcitx5.so" 
      "fcitx" "Fcitx5 (Flexible Input Method Framework5)" "fcitx5" "/usr/locale" "ja:ko:zh:*" 
      "fcitx5" "Fcitx5 (Flexible Input Method Framework5)" "fcitx5" "/usr/locale" "ja:ko:zh:*" 
      

4. Gtk IM module files:

   1. gtk 2:

      All found Gtk 2 immodule files exist.

   2. gtk 3:

      All found Gtk 3 immodule files exist.

   3. gtk 4:

      All found Gtk 4 immodule files exist.

Configuration:

Fcitx Addons:

1. Addon Config Dir:

   Found fcitx5 addon config directory: /usr/share/fcitx5/addon.

2. Addon List:

   1. Found 21 enabled addons:

      Classic User Interface 5.1.7
      Clipboard 5.1.7
      DBus 5.1.7
      DBus Frontend 5.1.7
      Emoji 5.1.7
      Fcitx4 Frontend 5.1.7
      IBus Frontend 5.1.7
      Input method selector 5.1.7
      Keyboard 5.1.7
      KDE Input Method Panel 5.1.7
      Status Notifier 5.1.7
      Notification 5.1.7
      Quick Phrase 5.1.7
      Rime 5.1.4
      Spell 5.1.7
      Unicode 5.1.7
      DBus Virtual Keyboard 5.1.7
      Wayland 5.1.7
      Wayland Input method frontend 5.1.7
      XCB 5.1.7
      X Input Method Frontend 5.1.7
      

   2. Found 0 disabled addons:

3. Addon Libraries:

   All libraries for all addons are found.

4. User Interface:

   Found 3 enabled user interface addons:

   Classic User Interface
   KDE Input Method Panel
   DBus Virtual Keyboard
   

   Kimpanel process:

      2411 /usr/bin/gnome-shell
   

Input Methods:

1. /home/gky/.config/fcitx5/profile:

   [Groups/0]
   # Group Name
   Name=Dvorak
   # Layout
   Default Layout=us-dvorak
   # Default Input Method
   DefaultIM=keyboard-us-dvorak
   
   [Groups/0/Items/0]
   # Name
   Name=keyboard-us-dvorak
   # Layout
   Layout=
   
   [Groups/1]
   # Group Name
   Name=Programmer
   # Layout
   Default Layout=us-dvp
   # Default Input Method
   DefaultIM=keyboard-us-dvp
   
   [Groups/1/Items/0]
   # Name
   Name=keyboard-us-dvp
   # Layout
   Layout=
   
   [Groups/2]
   # Group Name
   Name=Chinese
   # Layout
   Default Layout=us-dvp
   # Default Input Method
   DefaultIM=rime
   
   [Groups/2/Items/0]
   # Name
   Name=rime
   # Layout
   Layout=us
   
   [GroupOrder]
   0=Programmer
   1=Dvorak
   2=Chinese
   

Log:

1. date:

   Sat Feb 15 08:18:59 PM PST 2025
   

2. /home/gky/.config/fcitx5/crash.log:

   /home/gky/.config/fcitx5/crash.log not found.

Warning: the output of fcitx5-diagnose contains sensitive information, including the distribution name, kernel version, name of currently running programs, etc.

Though such information can be helpful to developers for diagnostic purpose, please double check and remove as necessary before posting it online publicly.

[wengxt]

I think it is because gnome dashboard will triggers on super release which prevents super key release to be received from application point of view.

I don't have a solution for it for now other than change super space to something else.

[gky99]

Thanks for your reply. I just tested it works as expected after I switched the hotkey to "ctrl+space".