RPI3B+ QtQuick.VirtualKeyboard failed to extract plugin

ino_edt

Hi,

I'm developping a project on an RPI 3B+ with qt5 creator installed from repo:

sudo apt-get install qt5-default
sudo apt-get install qtcreator

I was able to run some basic code with windows and buttons, however when I started to play with virtualkeyboard an error occured and I don't know how i'm supposed to manage it...

Procedure:

With QT creator launched on the RPI, create a new project with virtualkeyboard.
I used "Desktop" by default for the compile tools. (same as I used before)
A project named test is created where 3 files are included:

test.pro

QT +=quick
CONFIG += c++11

DEFINES += QT_DEPRECATED_WARNINGS

SOURCES += \
        main.cpp

RESOURCES += qml.qrc

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

main.cpp
with

qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));

main.qml
Imports are done automatically:

1. import QtQuick 2.9
2. import QtQuick.Window 2.2
3. import QtQuick.VirutalKeyboard 2.2
4. 
5. Window {
6.   id: window
7. ...

An inputPanel is added on a window

Finally, without touching anything, I tried to compile and execute the code.
Compilation done without any troubles, then executing i got the following error:

QML debugging is enabled. Only use this in a safe environment.
libEGL warning: DRI2: failed to authenticate
qt5ct: using qt5ct plugin
QQmlApplicationEngine failed to load component
qrc:/main.qml:3 plugin cannot be loaded for module "QtQuick.VirtualKeyboard": Failed to extract plugin meta data from '/usr/lib/arm-linux-gnueabihf/qt5/qml/QtQuick/VirtualKeyboard/libqtquickvirtualkeyboardplugin.so'

09:49:28: /home/pi/workspace/build-test3-manuDesk-Debug/test3 exited with code 255

/usr/lib/arm-linux-gnueabihf/qt5/qml/QtQuick/VirtualKeyboard/libqtquickvirtualkeyboardplugin.so exists and the path is accessible.
I tried to cross-compile QT entirely and replace libqtquickvirtualkeyboardplugin.so with the one got by cross compiling and got the same error.
I tried to change arbitrary versions of virtualkeyboard imports but I wasn't lucky enough.

Quite sure it's something terribly stupid (and maybe not related to QT) but I don't where to find any solution...
Thanks for any help.

raphasauer

Hello! Were you able to fix this issue? I am facing something quite similar, however with a native build of Qt 5.15.2 and the QtQuick module.