Active Protection System
Linux support is in early development.
This feature definitely depends on software and there is no hardware or BIOS only way of making it work. A statement from IBM clearifies this: "The APS system will require APS software to be installed on the computer before it activates the harddrive parking . This means it will not work on systems preloaded with Linux."
IBM made contradictory statements about their willingness to release the specifications of the hardware sensor and its API to the linux community or some developers. Although a lot of developers and other interested people from the OpenSource community actively contacted IBM to get the specs, in fact they never got them.
Meanwhile, some independent projects are making progress:
- Quoted from NewScientist.com: The latest Apple PowerBook laptops can be controlled with a gentle shake. Programmer Amit Singh has written code that lets him use the sensor to control software on the computer. The code is published at www.kernelthread.com/software/ams/.
- There is a fairly detailed article about reverse engineering the APS accelerometer interface by Mark Smith from IBM Research. Apparently they even have a prototype Linux driver working, but cannot release the full source yet.
- The HDAPS project is dedicated to developing & testing a kernel module and a user space application. More info on this can also be optained from the HDAPS mailinglist and its archive. An older version of the driver is currently at http://lemonshop.dk/ibm_hpaps/. You can also find some of the coders working on this module in the #hdaps channel on irc.freenode.org.
- IBMs ThinkVantage™ Technologies Flash presentation - Active Protection System
- HDAPS-devel list archive
- Temporary location of current HDAPS driver