Screen responsiveness is flaky - delays, no press registration

[Tomsgate]

I regularly notice delays when I touch the screen, especially when typing. Sometimes key presses are simply not registered. It can become really annoying... I also noticed that keyboard press sounds sometimes seem cut, they do not play properly... as if the tablet couldn't follow. Note that this happens however fast I type (even at like 1 char per second!).

[Sleepingeye]

I suspect this has to do with issue #76 as well.