CrunchBang Linux Forums / Laptop power saving script for #! & Debian

Re: Laptop power saving script for #! & Debian

dummy@example.com (el_koraco) — Tue, 05 Feb 2013 19:10:04 +0000

typewriterjason wrote:

Hey @el_koraco, when you said 'my version of the script,' do you mean the 1st script posted by Hardan3, or Unia's script?

I meant hardan's.

@Unia - pm-utils is installed by default in normal distros, so...
wrt governors, I'm getting 30 or 40 minutes more on powersave. This is all very unscientific, of course. I haven't tried the conservative governor, I'm sticking to the "if it's not broke" philosophy here.

Re: Laptop power saving script for #! & Debian

dummy@example.com (Unia) — Tue, 05 Feb 2013 18:16:56 +0000

el_koraco wrote:

I don't even think these things are necessary any more. Most of this stuff has been integrated into newer versions of pm-utils. fewt has even sopped Jupiter development. The only thing I do have in my version of the script that isn't present upstream is going on the powersave CPU governor on battery. Check /usr/lib/pm-utils for more details.

True, I do not use pm-utils or any of its siblings so I came up with my own version. I do like the simplicity of my script over pm-utils.

Regarding the powersave governor, some say it's not as powersaving as its name suggests. I could come up with some links on the matter, but I have to go soon. Are you aware of those statements, el_K?

Re: Laptop power saving script for #! & Debian

dummy@example.com (typewriterjason) — Tue, 05 Feb 2013 17:02:51 +0000

I've been wondering about that. I'm running Waldorf, (not bleeding-edge versions, but still) and when I installed Hardan3's script, I didn't really notice a change. Maybe that's because of the pm-utils?

Hey @el_koraco, when you said 'my version of the script,' do you mean the 1st script posted by Hardan3, or Unia's script?

Re: Laptop power saving script for #! & Debian

dummy@example.com (el_koraco) — Tue, 05 Feb 2013 16:46:18 +0000

I don't even think these things are necessary any more. Most of this stuff has been integrated into newer versions of pm-utils. fewt has even sopped Jupiter development. The only thing I do have in my version of the script that isn't present upstream is going on the powersave CPU governor on battery. Check /usr/lib/pm-utils for more details.

Re: Laptop power saving script for #! & Debian

dummy@example.com (Unia) — Tue, 05 Feb 2013 15:36:47 +0000

typewriterjason wrote:

Oh, that's ok. I'll do my own research.
But while I'm bugging you. Do I put both the 'powersave' script and the 'powersave.sh' script in /usr/bin/ ?
Apologies for the pestering.

The Makefile has the correct paths; powersave goes into /usr/bin, and powersave.sh is only if you're using systemd. If so, place it in /usr/lib/systemd/system-sleep/, if not you can ignore it.

An easy way to install would be to clone my git:

git clone git://github.com/Unia/powersave.git

Then cd in the directory you just cloned and from there, run sudo make install. It will put all the files in their respective paths as you see in the Makefile. Again, if you don't use systemd, you should remove the powersave.sh line from the Makefile before running sudo make install.

I hope that explains what you need to know?

Re: Laptop power saving script for #! & Debian

dummy@example.com (typewriterjason) — Mon, 04 Feb 2013 23:43:22 +0000

Oh, that's ok. I'll do my own research.

But while I'm bugging you. Do I put both the 'powersave' script and the 'powersave.sh' script in /usr/bin/ ?

Apologies for the pestering.

Re: Laptop power saving script for #! & Debian

dummy@example.com (Unia) — Mon, 04 Feb 2013 23:32:53 +0000

typewriterjason wrote:

Thanks for the response!
Hey, another question; your script has a powersave element for HDD, and I'm using a SSD... should I comment out that line or something?

I have no idea I have never ever read up anything on SSDs as I don't own one. You can try Googling on the subject and see if you come up with something. Otherwise, I guess I could look into it if you can't find anything. For now though, just to be safe, I'd comment it out.

Re: Laptop power saving script for #! & Debian

dummy@example.com (typewriterjason) — Mon, 04 Feb 2013 22:02:55 +0000

Thanks for the response!

Hey, another question; your script has a powersave element for HDD, and I'm using a SSD... should I comment out that line or something?

Re: Laptop power saving script for #! & Debian

dummy@example.com (Unia) — Sat, 02 Feb 2013 20:56:02 +0000

We both use a similar approach, but you might get a situation in which my script overrides Hardran's, where Hardran's would again override mine etc.. so just to be safe I would install only one at a time.

You can install them both (not simultaneously ) and then see which gives you better battery life and stick with that one.

Re: Laptop power saving script for #! & Debian

dummy@example.com (typewriterjason) — Sat, 02 Feb 2013 17:41:27 +0000

I installed Hardran3's script the other night, and I haven't seen any major increase to the battery life.

Unia, I don't have enough knowledge to immediately tell this, so can you tell me; is your script substantially different? Can I install your script as well, or would it not play well with Hardran3's script?

Re: Laptop power saving script for #! & Debian

dummy@example.com (zubcho81) — Sun, 27 Jan 2013 19:22:05 +0000

xaos52 wrote:

Run the script yourself with -x option:
sudo sh -x 

zubcho@crunchbang-lap:~$ sudo sh -x /etc/pm/power.d/powersave
+ buslist=pci spi i2c
+ exit 0

and still not working

Re: Laptop power saving script for #! & Debian

dummy@example.com (xaos52) — Sun, 27 Jan 2013 19:09:06 +0000

Run the script yourself with -x option:

sudo sh -x

Re: Laptop power saving script for #! & Debian

dummy@example.com (zubcho81) — Sun, 27 Jan 2013 18:30:03 +0000

I have a question. Why when my script is triggered

#!/bin/sh
# A script to enable laptop power saving features for #! & Debian GNU+linux.
# http://crunchbanglinux.org/forums/topic/11954

# List of modules to unload, space seperated. Edit depending on your hardware and preferences.
#modlist="uvcvideo"
# Bus list for runtime pm. Probably shouldn't touch this.
buslist="pci spi i2c"

case "$1" in
    true)
    # Enable some power saving settings while on battery
       # Enable laptop mode
        echo 5 > /proc/sys/vm/laptop_mode
#--------------------------------------------------------------------------------------
       # Less VM disk activity. Suggested by powertop
        echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
#--------------------------------------------------------------------------------------
       # Intel power saving
        #echo Y > /sys/module/snd_hda_intel/parameters/power_save_controller
        #echo 1 > /sys/module/snd_hda_intel/parameters/power_save
#--------------------------------------------------------------------------------------
       # Set backlight brightness to 10%
        echo 1 > /sys/class/backlight/radeon_bl/brightness
#--------------------------------------------------------------------------------------
       # USB powersaving
        for i in /sys/bus/usb/devices/*/power/autosuspend; do
            echo 1 > $i
        done
#--------------------------------------------------------------------------------------
       # SATA power saving
        #for i in /sys/class/scsi_host/host*/link_power_management_policy; do
           #echo min_power > $i
           #done
#--------------------------------------------------------------------------------------
       # Disable hardware modules to save power
        for mod in $modlist; do
            grep $mod /proc/modules >/dev/null || continue
            modprobe -r $mod 2>/dev/null
        done
#--------------------------------------------------------------------------------------        
       # Enable runtime power management. Suggested by powertop.
        #for bus in $buslist; do
            #for i in /sys/bus/$bus/devices/*/power/control; do
              #  echo auto > $i
            #done

#--------------------------------------------------------------------------------------        
        #ipw2000 eth1 powersave
        iwpriv eth1 set_power 5
#--------------------------------------------------------------------------------------
		#CPU powersave mode
		cpufreq-set -g userspace 
		for i in /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor; do
			echo userspace > $i 
		  done
		cpufreq-set -u1000000
			
		#Ethernet down
		ifconfig eth0 down
		
		#HDD powersave mode
		hdparm -B 1 -S 12 /dev/sda
		
		#Kill ad-on storage
		hal-disable-polling --device /dev/cdrom
		
		ethtool -s eth0 wol d
    ;;
#--------------------------------------------------------------------------------------
    false)
       #Return settings to default on AC power
        echo 0 > /proc/sys/vm/laptop_mode
        echo 500 > /proc/sys/vm/dirty_writeback_centisecs
        #echo N > /sys/module/snd_hda_intel/parameters/power_save_controller
        #echo 0 > /sys/module/snd_hda_intel/parameters/power_save
        echo 10 > /sys/class/backlight/radeon_bl/brightness
        for i in /sys/bus/usb/devices/*/power/autosuspend; do
            echo 2 > $i
        done
        #for i in /sys/class/scsi_host/host*/link_power_management_policy
            #do echo max_performance > $i
        #done
        for mod in $modlist; do
            if ! lsmod | grep $mod; then
                modprobe $mod 2>/dev/null
            fi
        done
        #for bus in $buslist; do
            #for i in /sys/bus/$bus/devices/*/power/control; do
             #done
        iwpriv eth1 set_power 6
        cpufreq-set -g ondemand
        cpufreq-set -u1710000
        ifconfig eth0 up
		hdparm -B 255 -S 60 /dev/sda
        
    ;;
esac

exit 0

line 1 is working

1. cpufreq-set -g userspace

but 2 and 3 are not...

2. for i in /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor; do
echo userspace > $i
done
3. cpufreq-set -u1000000

and the processor stays at 600mhz

 cpufreq-info 

cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 10.0 us.
  hardware limits: 600 MHz - 1.70 GHz
  available frequency steps: 1.70 GHz, 1.60 GHz, 1.40 GHz, 1.20 GHz, 1000 MHz, 800 MHz, 600 MHz
  available cpufreq governors: userspace, powersave, ondemand, conservative, performance
  current policy: frequency should be within 600 MHz and 600 MHz.
                  The governor "userspace" may decide which speed to use
                  within this range.
  current CPU frequency is 600 MHz.

I want it to run between 600 and 1000 mhz, but it is working at 600.

I have to manually set in terminal
sudo cpufreq-set -u1000000

And it is working.

Re: Laptop power saving script for #! & Debian

dummy@example.com (bandibp) — Fri, 18 Jan 2013 21:50:52 +0000

foozer wrote:

Are you sure those are not the same lines from before? Remove the log file, it will create a new one. Test unplugging and plugging and see if they pop up again.

Ok that did the trick. Now I'm getting this:

/usr/lib/pm-utils/power.d/anacron true:success.
/etc/pm/power.d/powersave true:/etc/pm/power.d/powersave: 66: cannot create /sys/devices/virtual/backlight/acpi_video0/brightness: Directory nonexistent
/etc/pm/power.d/powersave: 66: cannot create /sys/bus/spi/devices/*/power/control: Directory nonexistent
success.
/usr/lib/pm-utils/power.d/sched-powersave true:**sched policy powersave ON
success.
/usr/lib/pm-utils/power.d/anacron false:success.
/etc/pm/power.d/powersave false:/etc/pm/power.d/powersave: 66: cannot create /sys/devices/virtual/backlight/acpi_video0/brightness: Directory nonexistent
/etc/pm/power.d/powersave: 66: cannot create /sys/bus/spi/devices/*/power/control: Directory nonexistent
success.
/usr/lib/pm-utils/power.d/sched-powersave false:**sched policy powersave OFF
success.
/usr/lib/pm-utils/power.d/anacron true:success.
/etc/pm/power.d/powersave true:/etc/pm/power.d/powersave: 66: cannot create /sys/devices/virtual/backlight/acpi_video0/brightness: Directory nonexistent
/etc/pm/power.d/powersave: 66: cannot create /sys/bus/spi/devices/*/power/control: Directory nonexistent
success.
/usr/lib/pm-utils/power.d/sched-powersave true:**sched policy powersave ON
success.
/usr/lib/pm-utils/power.d/anacron false:success.
/etc/pm/power.d/powersave false:/etc/pm/power.d/powersave: 66: cannot create /sys/devices/virtual/backlight/acpi_video0/brightness: Directory nonexistent
/etc/pm/power.d/powersave: 66: cannot create /sys/bus/spi/devices/*/power/control: Directory nonexistent
success.
/usr/lib/pm-utils/power.d/sched-powersave false:**sched policy powersave OFF
success.
/usr/lib/pm-utils/power.d/anacron true:success.
/etc/pm/power.d/powersave true:/etc/pm/power.d/powersave: 66: cannot create /sys/devices/virtual/backlight/acpi_video0/brightness: Directory nonexistent
/etc/pm/power.d/powersave: 66: cannot create /sys/bus/spi/devices/*/power/control: Directory nonexistent
success.
/usr/lib/pm-utils/power.d/sched-powersave true:**sched policy powersave ON
success.

So everything works now, except I don't have those /sys entries on my system. Next challenge is gonna be to sort those out. Thanks for your help!

Re: Laptop power saving script for #! & Debian

dummy@example.com (foozer) — Fri, 18 Jan 2013 21:39:01 +0000

bandibp wrote:

foozer wrote:
The powersave options are supposed to be ON when /etc/pm/power.d/powersave gets the "true" parameter, and OFF when it gets the "false" parameter, so everything is alright. When unplugging your AC cable, "powersave true" is called, when plugging it in, "powersave false" is called.
Thank you, now the script is executable, but I'm still getting 'not executable' on a couple of lines when running cat /var/log/pm-powersave.log. Should I be concerned about this?

Are you sure those are not the same lines from before? Remove the log file, it will create a new one. Test unplugging and plugging and see if they pop up again.