Title: QLineEdit in Linux Qt App Not Triggering Chinese Input (IBus)

[AimyGS]

Problem:
Native QLineEdit in my Qt5.15.2 application cannot activate Chinese input via IBus on Linux. Chinese input works in terminals/text editors (e.g., Gedit), but not in Qt apps.

Attempted Solutions:

1. Set environment variables:
   bash
   export QT_IM_MODULE=ibus Also tried "xim"
2. Confirmed that the IBus plugin for Qt gcc64 at:
   libibusplatforminputcontextplugin.so
   (Executable permissions are granted.)
3. No ibus-qt package installed (only Qt4 versions seem available; no Qt5 version found).

[JoeCFD]

1. check dependencies
   ldd path/libibusplatforminputcontextplugin.so
2. export QT_DEBUG_PLUGINS=1 to check if this plugin is loaded or run
   strace your_app to check if the plugin is loaded correctly.
3. rebuild Qt with flag: -ibus from the source