Summary
There is a process called fpbuttons running that monitors
the front-panel buttons for presses and responds to them. It can be
turned off to save memory and/or prevent people from using the front
panel.
Similarly, there is a process called irremote that
watches for remote-control keypresses and responds to those. It too
can be turned off should you want to save more memory or prevent the
remote control from being used.
Details
You can stop the fpbuttons process by killing it. This will only last
until the next reboot. To stop it permanently you must edit the
/etc/inittab file and remove (or comment out) the line:
::respawn:/usr/local/bin/fpbuttons
The same goes for the irremote process.
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