[yparitcher]

the K4NT has a different command for rtc, found after much trail and error.

lipc-set-prop -i  com.lab126.powerd rtcWakeup 100

however this can only be set when the kindle is in the readyToSuspend state which it enters for a few seconds before sleeping.

this can be trigger by writing a backround script to detect a kindle in readyToSuspend and optionaly wakeup state to have it run a script and reset th wakeup clock.

for example:
backround script

#!/bin/sh

# location of your program
PROGRAM=/mnt/us/program.sh
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8


do_program()
{
	if [[ -f "$PROGRAM" ]]; then
	  # run program function to set picture
	  $PROGRAM do
	fi
}

run_program()
{
	if [[ -f "$PROGRAM" ]]; then
	  # run program function to reset wakup rtc
	  $PROGRAM run
	fi
}

lipc-wait-event -m com.lab126.powerd goingToScreenSaver,readyToSuspend | while read event; do
	case "$event" in
		goingToScreenSaver*)
			do_program;;
		readyToSuspend*)
			run_program;
	esac
done;

program script

#!/bin/sh

do()
{
	# set picture using fbink or eips
}

run()
{
	do
	# set to your delay between picture changes
	DELTA=$(( `date +%s` + 300 ))
	lipc-set-prop -i  com.lab126.powerd rtcWakeup $DELTA
}

# Main
case "${1}" in
	"run" )
		${1}
	;;
	"do" )
		${1}
	;;
	* )
		run
	;;
esac

return 0