ACPI sleep power drain test script - Revision history

Demerson3: note non-POSIX date +%s

2012-01-15T04:34:16Z

note non-POSIX date +%s

Demerson3: completely rewrote the script. Now supports newer kernels and is more flexible and easier to customize.

2012-01-15T04:26:30Z

completely rewrote the script. Now supports newer kernels and is more flexible and easier to customize.

Show changes

Apapadop at 21:29, 23 November 2006

2006-11-23T21:29:38Z

Wilmer: Added two checks (at least the first one is probably a good idea for people like me ;-))

2006-08-07T18:27:46Z

Added two checks (at least the first one is probably a good idea for people like me ;-))

Ajbarr: /proc/acpi/sleep is a legacy interface not supported on some kernels

2006-03-28T18:15:35Z

/proc/acpi/sleep is a legacy interface not supported on some kernels

84.191.129.63 at 22:32, 31 July 2005

2005-07-31T22:32:35Z

84.191.129.63 at 22:31, 31 July 2005

2005-07-31T22:31:54Z

84.191.129.63 at 22:23, 31 July 2005

2005-07-31T22:23:38Z

84.191.129.63 at 22:23, 31 July 2005

2005-07-31T22:23:04Z

Evan.heidtmann: Add note about second battery

2005-07-31T15:39:59Z

Add note about second battery

← Older revision		Revision as of 04:34, 15 January 2012
Line 35:		Line 35:

	# written for linux kernel 2.6.38, with older kernel options that you can uncomment if needed		# written for linux kernel 2.6.38, with older kernel options that you can uncomment if needed
		+	# as far as I know, this script contains only one non-POSIX command: date +%s

	# uncomment and/or change the following parameters if you need to pass them to pm-suspend		# uncomment and/or change the following parameters if you need to pass them to pm-suspend

@@ Line 12: / Line 12: @@
 *It is not totally reliable, e.g. on some (all?) R32 the values ACPI reports for the battery are wrong by factor 10. They are actually reported in cWh instead of mWh. The script assumes they are reported in mWh as on most ThinkPads - hence the power consumption appearce to be only a tenth of its actual value.
 *The script assumes you have only one battery. If you have a second battery (for example, an UltraBay Slim battery), take it out for this test or change the BATTERY variable from "BAT0" to "BAT1". If you do the latter, you will get bogus results if the second battery is run down while sleeping.
-*The usage threshold of 1000 mWh might be a bit a bit too tolerant. You can try lowering it to 500 to be sure.}}
+*The usage threshold of 1000 mWh might be a bit a bit too tolerant. You can try lowering it to 500 to be sure.
 Please save this script to a file, i.e. {{path|sleep.sh}}, make it executable ({{cmdroot|chmod +x sleep.sh}}) and execute it as root while your notebook is on battery. To get representative values you should leave the notebook suspended for at least 20 minutes.

@@ Line 23: / Line 23: @@
   BATTERY=BAT0
   THRESHOLD=1000
   # remove USB for external mouse before sleeping

@@ Line 43: / Line 43: @@
   BAT_BEFORE=`grep 'remaining capacity' /proc/acpi/battery/$BATTERY/state | awk '{print $3}'`
   # go to sleep
-  echo 3 > /proc/acpi/sleep
+  if [ -e /proc/acpi/sleep ]; then
   # get end values

@@ Line 18: / Line 18: @@
   #!/bin/sh
   # sleep.sh test script for measuring power drain during suspend-to-ram with ACPI
-−
   # default settings, change if needed
   LOG=/var/log/battery.log
@@ Line 42: / Line 42: @@
   DATE_BEFORE=`date +%s`
   BAT_BEFORE=`grep 'remaining capacity' /proc/acpi/battery/$BATTERY/state | awk '{print $3}'`
-−
   # go to sleep
   echo 3 > /proc/acpi/sleep
@@ Line 49: / Line 49: @@
   DATE_AFTER=`date +%s`
   BAT_AFTER=`grep 'remaining capacity' /proc/acpi/battery/$BATTERY/state | awk '{print $3}'`
-−
   # do the calculations
   DIFF=`echo "$BAT_AFTER - $BAT_BEFORE" | bc`
   SECONDS=`echo "$DATE_AFTER - $DATE_BEFORE" | bc`
   USAGE=`echo "($DIFF * 60 * 60) / ($SECONDS)" | bc`
-−
   # output the results
   echo "before: $BAT_BEFORE mWh" >> $LOG
@@ Line 74: / Line 74: @@
   fi
   echo "" >> $LOG
-−
   # restore USB support
   if !(lsmod | grep '^ehci_hcd') >/dev/null ; then

@@ Line 1: / Line 1: @@
-The following script will suspend your notebook to ram and output some statistics about the power drain during suspend to <tt>/var/log/battery.log</tt>. The output will look something like this:
+The following script will suspend your notebook to ram and output some statistics about the power drain during suspend to {{path|/var/log/battery.log}}. The output will look something like this:
   Di Jan 11 14:01:15 CET 2005
@@ Line 9: / Line 9: @@
   Congratulations, your model seems NOT to be affected.
-{{NOTE|This is not totally reliable, e.g. on some (all?) R32 the values
+{{NOTE|This Script has some limitations:
-reported by ACPI for the battery are wrong by a factor 10, i.e. they are actually
+*It is not totally reliable, e.g. on some (all?) R32 the values ACPI reports for the battery are wrong by factor 10. They are actually reported in cWh instead of mWh. The script assumes they are reported in mWh as on most ThinkPads - hence the power consumption appearce to be only a tenth of its actual value.
-reported in cWh instead of mWh. Thus the script thinks that the power
+*The script assumes you have only one battery. If you have a second battery (for example, an UltraBay Slim battery), take it out for this test or change occurrances of "BAT0" in the script to "BAT1". If you do the latter, you will get bogus results if the second battery is run down while sleeping.
-consumption is only a tenth of its actual value.
+*The usage threshold of 1000 mWh might be a bit a bit too tolerant. You can try lowering it to 500 (<code>if [ $USAGE -gt -500 ]) to be sure.}}
-Please save this script to a file, i.e. <tt>sleep.sh</tt>, make it executable (<code>chmod +x sleep.sh</code>) and execute it as root while your notebook is on battery. To get representative values you should leave the notebook suspended for at least 20 minutes.
+Please save this script to a file, i.e. {{path|sleep.sh}}, make it executable ({{cmdroot|chmod +x sleep.sh}}) and execute it as root while your notebook is on battery. To get representative values you should leave the notebook suspended for at least 20 minutes.
   #!/bin/sh