Problems running QtVirtualKeyboard with Wayland Compositor

[Nic Greenway]

Hi All, I have a problem using the desktop QtVirtualKeyboard with a Wayland-based platform.

We have a Qt5 app running on Yocto Linux with a Wayland display server. When the QtVKB is invoked by e.g. clicking an input box, it flashes up briefly on the screen then vanishes. Our main application is quite large, but I have recreated this using a small test app.

I set WAYLAND_DEBUG=1 and QT_LOGGING_RULES="qt.virtualkeyboard=true;qt.qpa.wayland*=true" but there was nothing to indicate the problem.

I have seen talk elsewhere about the QtVKB having problems with Wayland, is this a known issue?

It runs just fine on Ubuntu.

Any pointers appreciated!

[Nic Greenway]

Apologies, this is a known issue, the application-integration method using the QML InputPane has to be used with Wayland, desktop integration won't work, see bug report

The docs do also say application integration is mandatory in environments where there is no support for multiple top-level windows.

That will teach me to RTFM!