Please have a look at the "accelerometer data retrieval" wiki page at http://wiki.openmoko.org/wiki/Accelerometer_data_retrieval .
It is said that "the Z axis is pointing from the display downwards to to the back of the openmoko". In my opinion this is false and all other axes my be inverted as well. The confusion seams to originates from the Z value you read from the accelerometer which is positive when the phone lies horizontally. But the fact that the gravitation vector G points downward means that the acceleration measured by the sensor is actually upward : gravitationnal force is equivalent to an acceleration in the other direction (remember the elevator analogy : beeing pulled down toward the ground by gravity is equivalent to standing in an elevator that continuously accelerate _upward_ in the absence of gravity). So, the fact that when idle the accelerometers report a positive Z value implies that the Z axe is actually upward. Agree ? _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community