Hi Rainer,Hi jimm,
soI will try to write in english. I think your settings of the "Settings" - "Display" "Proximity Sensor Calibration" is wrong. You have to start the settings and to go in half-dark room. Not dark, and not directly in the sun. There is a message " calibration". Press this button. Then a windoe popup " Clibration Tips" press yes and it was finish.
If all is allright, the make a phone an hold your hand or finger on the left upper edge of your HD2. The screen will be black. When you put your hand away, the screen is on.
Regards Rainer
My problem is that option Display gives error and forces close