Podziel się wrażeniami!
Rozwiązane! Idź do rozwiązania.
Launch diagnostics app and check if top of your touch screen is working.
Also inspect the phone under direct light for any hairline cracks in top part of the screen.
what if you restart the phone?
You can boot on safe mode
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008
If it come to worse you can repair your phone with
Bridge (for Mac)
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
@maximus74 Sorry to hear that, you will have to contact your local Xperia Care regarding the crack