Unable to operate input device if it is connected after QT application started

https://forum.qt.io/topic/161917/unable-to-operate-input-device-if-it-is-connected-after-qt-application-started

I am working on an embedded target with IMX6 processor where my QT HMI application is running when the target booted up . I am connecting a touch screen to this target device. If the touch screen is connected when the target boots up , then everything works fine and I able to operate the touch screen for the HMI QT application .

The problem is when I disconnect the input device (touch screen) and connect it only after the target started the application , then I am able to see the application running on the HMI screen , but not able to click on anything on the HMI screen as the touch events are not detected.

How this can be managed in the QT. Anybody resolved this in the past ?