Fcitx5 startup failed #1430

Windows build number:

22631.0

Your Distribution version:

Debian 13

Your WSL versions:

WSL version: 2.6.3.0
Kernal version: 6.6.87.2-1
WSLg version: 1.0.71
MSRDC version: 1.2.6353
Direct3D version: 1.611.1-81528511
DXCore version: 10.0.26100.1-240331-1435.ge-release
Windows version: 10.0.22631.4169

Steps to reproduce:

1. install Debian
2. install fcitx5：
   sudo apt install -y fcitx5 fcitx5-chinese-addons fcitx5-frontend-gtk3 fcitx5-frontend-gtk4 fcitx5-frontend-qt5 fcitx5-frontend-qt6
   3.Configure Environment Variables:
   export GTK_IM_MODULE=fcitx
   export QT_IM_MODULE=fcitx
   export XMODIFIERS=名侦探嗑糖 (@im)=fcitx
   4.Start fcitx5
   fcitx5

WSL logs:

pulseaudio.log

weston.log

stderr.log

WSL dumps:

No response

Expected behavior:

Fcitx5 started successfully without any error messages

Actual behavior:

Running fcitx5 results in the following error:

zwp_input_method_v1#10: error 0: permission to bind input_method denied Wayland connection got error: 71

Fcitx5 exits immediately after this error.

by the way, if Starting Fcitx5 with:
fcitx5 --disable=waylandim --disable=wayland

Results:

• Fcitx5 runs successfully
• Chinese input works

Additional Findings

However, a different issue appears when using IntelliJ IDEA:
Symptoms:

• Certain UI elements fail to appear sometimes when clicked
  Example: Main Menu → Settings → Plugins → gear icon (top right)
• The UI appears frozen or unresponsive
• The popup window does not render immediately

Workaround behavior

Scrolling the plugin list with the mouse wheel causes the popup to appear

IntelliJ Log Output

During these events, IntelliJ logs:
WARN - #c.i.d.PerformanceWatcherImpl - UI was frozen for 12204ms, details saved to /home/ping/.cache/JetBrains/IntelliJIdea2025.3/log/threadDumps-freeze-20260326-140953-IU-253.32098.37-XInputMethod.setXICFocusNative-12sec

Critical Observation

If the Fcitx5 process is terminated:

• IntelliJ IDEA no longer reports UI freeze warnings
• All UI interactions behave normally
• The issue becomes unreproducible