Auto Hibernate in Ubuntu 13.04

Make your Ubuntu notebook hibernate after a period of sleep. The Ubuntu forums here go into depth but the script from the very helpful posters is:

#!/bin/bash
# Script name: /etc/pm/sleep.d/0000rtchibernate
# Purpose: Auto hibernates after a period of sleep
# Edit the "autohibernate" variable below to set the number of seconds to sleep.
curtime=$(date +%s)
autohibernate=7200
echo "$curtime $1" >>/tmp/autohibernate.log
if [ "$1" = "suspend" ]
then
 # Suspending. Record current time, and set a wake up timer.
 echo "$curtime" >/var/run/pm-utils/locks/rtchibernate.lock
 rtcwake -m no -s $autohibernate
fi
if [ "$1" = "resume" ]
then
 # Coming out of sleep
 sustime=$(cat /var/run/pm-utils/locks/rtchibernate.lock)
 rm /var/run/pm-utils/locks/rtchibernate.lock
 # Did we wake up due to the rtc timer above?
 if [ $(($curtime - $sustime)) -ge $autohibernate ]
 then
 # Then hibernate
 rm /var/run/pm-utils/locks/pm-suspend.lock
 /usr/sbin/pm-hibernate
 else
 # Otherwise cancel the rtc timer and wake up normally.
 rtcwake -m no -s 1
 fi
fi

Then

1. Place in /etc/pm/sleep.d
2. Name file 000rtchibernate so that it executes first.

See: askubuntu.com/questions/12383/how-to-automatically-from-suspend-into-hibernate

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