AM5718: QTVirtualKeyboard issue on Weston

Gonzalo Vara

Part Number: AM5718

Hi TI folks,

The QTVirtualKeyboard keyboard with Weston appears, but does not register keystrokes. On the terminal it leaves the following traces.

qt.qpa.wayland: qtvirtualkeyboard currently is not supported at client-side, use QT_IM_MODULE=qtvirtualkeyboard at compositor-side.

input method is not set

The variable QT_IM_MODULE is defined as indicated in the message.

We have looked around and we have seen that it seems that in the current Wayland/Weston version of the SITARA Linux SDK the virtual keyboard is not supported. Apparently the wayland-protocol package must have the input-method-unstable-v2 and text-input-unstable-v3 extension; only v1 of the two is there. The following links discuss the same problem:

https://bugreports.qt.io/browse/QTBUG-94994

https://forum.qt.io/topic/133785/running-weston-with-qtvirtualkeyboard-support

https://stackoverflow.com/questions/51996712/how-to-use-weston-keyboard-virtual-on-screen-keyboard-with-a-qt-application

Besides the extensions, the Weston package has to make use of them, we found a patch that "solved" this part, but it applies to a more modern version of Weston and we didn't manage to adapt it. In the following repo are the changes:
https://gitlab.freedesktop.org/daniels/weston/-/commit/7a32507372426b0e64dcb6251405a58b124ec25a

Any help you can offer is welcome!!! Thank you so much in advance.

Best regards,

Gonzalo Vara

over 3 years ago

0 Takuma Fujiwara over 3 years ago

TI__Guru 52873 points

Hi Gonzalo,

At TI, we only do basic enablement of components such as Qt and Weston, but we are not able to provide support. The best place to look for help would be to continue to get support from the Qt and Weston forums.

For reference, I will link the documentation that consolidates all the open source software integrated in our SDK. This document also shows where to look for help when facing issues regarding these open source software: https://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Overview_Technical_Support.html

Regards,

Takuma

0 Gonzalo Vara over 3 years ago in reply to Takuma Fujiwara

Intellectual 420 points

Hello,

To solve this issue we have removed Weston and based on the QML compositor from the following link:

https://code.qt.io/cgit/qt/qtwayland.git/tree/examples/wayland/pure-qml?h=5.15

We have prepared the compositor to be launched with Python instead of cpp.

Apart from this, for the compositor startup we have defined the environment variable QT_QPA_PLATFORM=eglfs. With the compositor already started; we launch our application, which redefines the variable before to wayland-egl and together with the variable QT_IM_MODULE=qtvirtualkeyboard, we have achieved that the keyboard is displayed and registers the keystrokes.

I hope this solution will be helpful for those who have the same problem.

Best regards,

Gonzalo Vara

Processors

Processors forum

AM5718: QTVirtualKeyboard issue on Weston