Xperia L Multi touch nem működik rendesen?

már leírták egy angol oldalon és nekem is ugyan ez a problémám:

So it's been about 3 week's since i bought this device and so far i don't have a single issue with this device. But recently, i downloaded quite a lot of FPS games which require multi-touch (Modern Combat 4, Modern Combat 3, Gangstar 4 Vegas, Dead Trigger) and i am facing issue with all of them. Not lagging or anything, the games run without any problem at highest settings but the multi-touch dosn't seem to recognize two touches at a time.

To give a bit of a mental image of what I'm dealing with here, I go to play a game on my phone (one of the above) and so on one side I have the movement button's (Up, Down, Left, Right etc. and on the right I shoot/aim around the screen, well the thing is, if my finger is on a button on the left for the movement and I go to aim while at the same time continuing to move, movement stops and it treats my aiming side as if it were the only finger on the screen at the time.

valami megoldás?