powertop is a script for reducing power consumption on laptops and desktops running Ubuntu.

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Why do some of my powertop commands not work

I'm trying to make my powertop tweaks permanent. I ran sudo powertop --html and the I have a list of the commands I need to add to /etc/rc.local. I added them to /etc/rc.local and most of them work, ...
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how to check power consumed by a c program?

I need to find out power consumed by a C program. please guys help me out with your experience it's kind of important for me. i have tried powertop command, but i am not able to get power consumed by ...
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1answer
48 views

powertop html file not providing echo commands

I have been trying to improve the power consumption of my Lenovo Z580 running Ubuntu 12.04. Powertop looks like one promising lead and I have been following the instructions provided here: How do I ...
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1answer
35 views

Usage unit in Powertop

When i use the powertop utility, the Usage column values are measured in ms/s or us/s. I'd assume the second s is second but what is the first s?
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90 views

PowerTOP: why sum of “Power est” values is much less than discharge rate?

I'm running Ubuntu 13.10 on a MSI gs70 Stealth laptop. When I run powertop 2.4, I see: The battery reports a discharge rate of 38.1 W The estimated remaining time is 0 hours, 5 minutes Summary: ...
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PowerTOP: what is “System baseline power”?

I'm running Ubuntu 13.10 on a MSI gs70 Stealth laptop. When I run powertop 2.4 it tells that (Device stats tab): The battery reports a discharge rate of 39.8 W System baseline power is estimated at ...
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Processor Tunable status according to Powertop

I am absolutely new to the LINUX platform, since I just migrated to Ubuntu 13.10 from Windows8. I installed powertop so that I could assess my processor. The Tunables window of the output returned by ...
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179 views

Many devices using 100% power in powertop

In Ubuntu 13.10 on my Mac Mini 4,1 the Devices tab in powertop reports a bunch of PCI devices using 100% power: Usage Device name 0.3% CPU use 100.0% ...
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56 views

Plenty of wakeups on idle, dell m4500

I've been working with ubuntu 12.04 for more than a year and I just can't find a solution for my battery shortness anywhere. I have dell m4500 - i7, 8 G ram (if you need any more details just say). ...
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320 views

Poor Battery Life on Samsung Series 5 NP550P5C

I recently bought a Samsung Series 5 NP550P5C and swapped out the 750GB HDD for a 250GB SSD then installed Ubuntu 12.04. For the most part its been working very well, except for the battery life. ...
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1answer
277 views

Trying to compile powertop for arm using cross compile in Ubuntu with malloc issue

I have been trying to compile powertop for an arm device. I saw powertop talked about here quite a bit and I am using Ubuntu to cross compile for the armv7l. The configure goes through checking ...
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2answers
312 views

Why do I get this unusual PowerTop readings?

I'm using PowerTop v2.1 in Ubuntu 13.04 and I'm getting some pretty strange readings. I've already run powertop --calibrate too. The main screen reads this: As you can see, the power estimates do ...
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powertop script problem

I made this script according to my powertop report: echo 'min_power' > '/sys/class/scsi_host/host0/link_power_management_policy'; echo 'auto' > ...
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3answers
1k views

Missed power est. column in powertop?

I used powertop v.2.1 under Ubuntu 12.04 but it missed the power est. column. It's the same situation as described here‎ and that bug is supposed to be fixed already. I tried lm_sensors but it ...
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416 views

(13.04) PowerTOP reports lots of usage by USB2.0-CRW, but autosuspend is on

I used to be able to keep my power usage under 10 watts without WLAN on but now that rarely happens. One reason might be this, reported by PowerTOP all of the time: Power est. Usage ...
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64 views

How to toggle Runtime-PM on shutdown/boot

I'm experiencing an issue with the Runtime PM option (via PowerTOP or laptop-mode) on Ubuntu 12.04. As far as I know, it's just a bug (although I think it affects Lenovo laptops more from what I've ...
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How To Install Powertop 2.3 & Permanently Save Changed Of Powertop Suggestions In Ubuntu? [duplicate]

I have Google every ppa and checked that they all have the powertop 2.1, So how can i install powertop 2.3 just recently released. How do make permanently save changes of powertop, i know i can put ...
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1answer
237 views

Integrated webcam on a Dell V131 drains the battery when not used. How to turn it off?

After using the integrated webcam, it never fully turns off and keeps hogging the battery. From powertop: The battery reports a discharge rate of 22.6 W The estimated remaining time is 0 hours, 41 ...
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1answer
52 views

powertop color codes

I am running powertop in Ubuntu 10.04. It shows a horizontal bar near the top that displays something like: Wakeups-from-idle per second : 723.6 interval: 10.0s My question is, why is the ...
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1answer
3k views

How to tweak Powertop to reduce power consumption?

I am a completely new user to Linux/Ubuntu. I looked through tips on battery issues and PowerTOP but failed to find clear tips on how to tweak PowerTOP except for Toggle Tunable. Could someone look ...
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1answer
819 views

Battery is drained too quickly

I'm getting really low battery life under ubuntu, not even close to windows. I tried powertop, and I saw that my laptop is consuming in idle nearly 20 watts (a bit more). I tried to install ...
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How can I disable usb-autosuspend for a specific device?

This is related to the issue discussed in this question. Summary: the mouse freezes when operating on battery since it is autosuspended after a certain time and needs more time to wake up. Disabling ...
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1answer
6k views

What should VM writeback timeout be set to for a laptop?

I am using powertop to check that my machine is setup in a way that will give me good battery life. After installing laptop-mode-tools all of the "Tunables" section shows "Good" except VM writeback ...
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3k views

How do I install Powertop 2.1 in 12.04?

I have installed Powertop from the Ubuntu Software Center and just realized that a new version is available. However this new version is not yet available in the Ubuntu Software Center. How do I then ...
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3answers
2k views

Why does battery power drain quicker in Ubuntu compared to WIndows in Dell Inspiron? [duplicate]

Possible Duplicate: Why does my computer get less battery life with Ubuntu compared to Windows? When I used Windows 7 with Dell Inspiron, I got a battery life of 2 hours. But ever since I ...
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1answer
4k views

Do 'Tunables' in 'PowerTop' help on battery life?

I installed PowerTOP 1.97 and i got many Bad in Tunables, I know i can press enter to toggle but does it really change anything? and if it does will it still be changed when i reboot? If i get ...
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1k views

How can I disable asus-nb-wmi when using battery power mode?

I'm trying to improve the battery life of my Asus U32U notebook. I'm running Ubuntu 12.04 64bit and using powertop it shows the following: PowerTOP 1.97 Overview Idle stats Frequency stats ...
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1answer
350 views

I have problems with compiling powertop on Ubuntu Precise

I tried to compile the latest release of powertop from github. I get some errors and I dont know what to do to fix this. make[3]: Leaving directory `/root/powertop/src' make[2]: Leaving directory ...
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1answer
1k views

Battery time decreased on an HP ProBook 4530s

I have HP ProBook 4530s. In Windows 7 after installing all HP drivers the 6-Cell battery works perfectly for 2+ hours but in Ubuntu 11.10 and now in 12.04 the battery time is not sufficient. It works ...
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How do I make Powertop changes permanent?

I'm on a Compaq 615 and it's fan is loud as hell. Not much you can do about that but I'm trying to keep the CPU/GPU as cool as possible. This is what Powertop has to say: If I change all of them ...
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1answer
1k views

Why does powertop think I have two displays?

Ok, so in powertop (version 1.97), in both the "overview" and "device stats" sections, I see two devices, each called "display backlight". One shows the correct percentage of use, e.g. if I lower ...
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100.0% usage by Audio codec hwC0D0: Realtek

I ran powertop, and it says that the Realtek audio codec is using 100.0% of the cpu. Is this a problem? I'm running Ubuntu 11.10 32-bit on Intel® Core™ i7 CPU M 640 @ 2.80GHz × 4 Sony VAIO laptop.
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941 views

How do I install powertop 1.13?

Since Ubuntu 11.10 a version of powertop is in the repository that is by intent aimed for developers. However for me as a user the old "classic" version like 1.13 is better suited. Do you know a ...
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2answers
1k views

How to permanently save powertop's suggestions?

So it's ok that if I run powertop then it suggest me to disable xy, etc., but after I exit powertop, reboot the pc, and start it again[powertop], it brings up the same tips again! So how can I ...
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3answers
1k views

Powertop is reporting 0 wakeups/second - can this be right?

I'm investigating tweaking my power consumption performance on Ubuntu. When I run Powertop, the output seems strange, and not much like any of the screenshots I see on the web. That might be ...
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1answer
638 views

Why shouldn't you enable laptop-mode when on AC power?

I'm looking at ways to reduce the amount of power used by my laptop, and one of the things I came across was enabling laptop-mode. Apparently this is enabled when I'm not on AC power, but I'd like to ...
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3answers
4k views

Sound system is eating away the battery

In my laptop the sound code is running at 100% even when I am not playing anything. It is causing my palm rest to hit significantly. While I do not face the issue on windows machine where I am using ...
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2answers
533 views

How to limit apps from writing too often and logging too much to disk?

Are there ways to keep this at a minimum or to limit it to only when necessary? This is from powertop. I suppose with Firefox there is not much that can be done unless history/cookies/cache/etc are ...
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3k views

How to make powertop “Device Power Management” suggestion permanent? [duplicate]

When I run powertop on my laptop I get following suggestion: Suggestion: Enable Device Power Management by pressing the P key Doing this results in considerable saving in power usage and I would ...
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2answers
5k views

Can and should I try enabling the CONFIG_INOTIFY kernel configuration option?

PowerTOP just offered the following suggestion: Suggestion: Enable the CONFIG_INOTIFY kernel configuration option. This option allows programs to wait for changes in files and directories ...
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1answer
4k views

How do I autosuspend a usb device?

I am trying to follow the instructions on Lesswatts, to enable usb autosuspend. When I run powertop, it says, that I have a device (USB device 2-6 : 2.4G Multimedia Wireless Kit (Chicony)) that is ...
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251 views

Chromium wakes up 300 times a second

If I've got a gmail tab open and nothing else, running powertop shows Wakeups-from-idle per second : 414.5 interval: 30.0s no ACPI power usage estimate available Top causes for wakeups: 61.9% ...
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1answer
4k views

How to enable the CONFIG_PM_ADVANCED_DEBUG kernel configuration option [duplicate]

Possible Duplicate: What is kernel configuration? I'm trying to save the battery power. For that i'm using powertop and one suggestion is "Enable the CONFIG_PM_ADVANCED_DEBUG kernel ...