Hello Since a few days i`m owner of Xperia Z2 tablet. What i noticed the screen sometimes recognise touch, but sometimes not. I wonder have anyone else has the same problem ?. I have newest drivers installed on it through PC Companion.
I have the same issues with the Z2 tablet. I've contacted the support via chat. They told me, that there is no problem known. There is a nice Youtube video which demonstrates this touchscreen behavior.