Autohibernate with pm-utils and laptop-mode

Question

Hi all,
I know this is a frequent problem but I cannot find any solution around the web.
I am using pm-utils and am able to suspend to disk and ram properly.
Now I want to hibernate automatically based on battery condition of my laptop.
I have installed acpi and laptop-mode-tool,  and both seem to work correctly, my battery status appear on conky, and every other events based on laptop-mode run smoothly.
I even wrote an /etc/laptop-mode/auto-hibernate.conf according to this post https://bbs.archlinux.org/viewtopic.php?id=50702.
But the problem is still there, the laptop doesn't autohibernate on low battery.
If anyone has managed to autohibernate based on low battery, I will glad to know his/her solution,
regards
Last edited by capnion (2012-01-25 10:38:18)

Answer 1

even if im not using the tools you pasted. this is what ive done (since my battery hardware is a bit shaky, i had to add some cornercases, which lead to me creating a new script).
some bits have been taken from the web (notify-send function for example).
see if it works for you. of course, input will be appreciated too!.
#!/bin/bash
# power management script for my crappy laptop
#BAT_FILE='/proc/acpi/battery/BAT0/state'
BAT_BASE='/sys/class/power_supply/BAT0/'
BAT_FILE='/sys/class/power_supply/BAT0/voltage_now'
PDIR="/run/"
LCK_FILE=${PDIR}`basename $0`.pid
SAFE_STATE='5000000'
MIN_STATE='10000000'
MAX_STATE='12500000'
THRESHOLD='10500000'
HIB_SECS=60
notify() {
# Usage: notify "title" "description" [options to pass to send-notify"
title="$1"
body="$2"
shift 2
opts="$*"
# Send messages to users listed by the 'users' command, but only once
# Maybe sh has a better way of doing set operations, but this works:
SENT=""
for USER in $(users); do
case $SENT in
"$USER") ;;
*" $USER") ;;
"$USER "*) ;;
*" $USER "*) ;;
# use 'su USER' to send the message
*) SENT="$SENT $USER";DISPLAY=:0 su $USER -c "notify-send $opts \"$title\" \"$body\"" ;;
esac
done
# test if we are root.
if [ $EUID != 0 ]; then
sudo "$0" "$@"
exit $?
fi
#test if we are running already
echo "LCK_FILE=$LCK_FILE"
if [ -f "${LCK_FILE}" ]; then
MYPID=`head -n 1 "${LCK_FILE}"`
TEST_RUNNING=`ps -p ${MYPID}|grep ${MYPID}`
if [ -z "${TEST_RUNNING}" ]; then
#the process is not running
echo $$ > "$LCK_FILE"
else
echo "`basename $0` is already running [${MYPID}]"
exit 0
fi
else
echo $$ > "$LCK_FILE"
fi
if [ -a "$BAT_BASE" ]; then
PRESENT=$(cat ${BAT_BASE}/present)
if [ $PRESENT == '0' ]; then
echo "Battery not present!"
rm "${LCK_FILE}"
exit 0
else
CURR_STATE=$(cat ${BAT_BASE}/voltage_now)
CHAR_STATE=$(cat ${BAT_BASE}/status)
fi
else
echo "Something wrong, file missing!"
rm "${LCK_FILE}"
exit 1
fi
if [ $CURR_STATE -lt $SAFE_STATE ]; then
echo "buggy batt, ignored result: $CURR_STATE"
rm "${LCK_FILE}"
exit 0
fi
if [ $CURR_STATE -lt $THRESHOLD ]; then
if [ $CHAR_STATE != "Charging" ]; then
echo "battery level low, hibernating in $HIB_SECS seconds"
notify "BATTERY STATUS" "battery level low, hibernating in $HIB_SECS seconds. Connect to AC to cancel"
sleep $HIB_SECS
CHAR_STATE=$(cat ${BAT_BASE}/status)
if [ $CHAR_STATE != "Charging" ]; then
/usr/sbin/pm-hibernate
# notify "BATTERY STATUS" "Comming out of hibernate!!"
rm "${LCK_FILE}"
exit 0
fi
notify "BATTERY STATUS" "Charger plugged. hibernate disabled"
fi
else
echo "battery state: $CHAR_STATE"
echo "battery level: $CURR_STATE"
# notify "battery level:" "$CURR_STATE"
fi
rm "${LCK_FILE}"
it is run by root every minute. it warns through notify-send one minute prior to hibernating, and aborts if the laptop was plugged within that minute.
some variables should be tweaked for your battery
EDIT: fixed a bug when testing if battery was being charged/discharged. added test for root.
Last edited by eldragon (2012-01-25 14:33:40)