Few issues can be mentioned.
•
The aps driver does not maintain state and subsequently does not take evasive action when it thinks the hard drive is in danger. Possible actions would include spinning down the hard drive in case excessive tremor is detected by the sensors.
•
The Y axis on X40 and possibly other models seems to be inverted. It is unknown how to distinguish between different versions of the accelerometer to compensate for this in the driver at this time.
•
The sensor values are refreshed every 0.5 seconds. Because no protection measures are taken, this is unnecessary and may have a negative effect on battery life.
•
As IBM provides no documentation, it is not known what all the available sensors are used for.