Can't receive mouse move events in fullscreen

[qtstarter121]

I'm having a problem where my mouseMoveEvent function doesn't get any events when i switch to fullscreen by
showFullScreen(); Any possible reasons why this may occur?

[high_flyer]

Any possible reasons why this may occur?

many.
Since you provided no clues on how your code works, nor code, its hard to say what it the problem on your code.
Having said that, one of the most common reasons for such problems is CPU hogging by a loop or something similar that denies qt from calling processEvents().