Mouse issue

michaelL

I am using Qt on embedded linux and have notice some issue with the mouse.
Some mouse works fine with the application and some doenst.
When the application is not running i notice that the OS gets the input events correctly on all of mouses:
cat /dev/input/event1

Once the application is running the "cat /dev/input/event1" doenst output anything anymore on the mouse that have this issue and the mouse pointer appears on the application but not doenst move. On the functional mouse the command "cat /dev/input/event1" outputs the events and i can move around on the application.

Any idea why Qt blocks the mouse?

michaelL

When i plug the USB Mouse from the device i get this issue from my Application:

evdevkeyboard: Could not read from input device (No such device)
evdevkeyboard: Failed to query led states
evdevkeyboard: Failed to query led states

michaelL

Hi,

i found the problem once i do "export QT_QPA_EVDEV_KEYBOARD_PARAMETERS=grab=1" before starting the application. The mouse doesnt work.
If i comment it out, it works.
Why is that? And how can i still grab the Keyboard and get the mouse working without this env variable?