Questions related to power management, particularly power saving measures.

learn more… | top users | synonyms (1)

6
votes
2answers
790 views

How can I increase time of working from my battery?

Usually I am not even able to watch film from start to end. I use Acer Aspire 5930 OS is Ubuntu 11.04 I use Classic Ubuntu desktop (AFAIK it really means GNOME2) I know, that: I can decrease ...
6
votes
4answers
6k views

Monitor won't enter power save mode

My LCD monitor won't enter power save mode. I've gone into System → Preferences → Screensaver, clicked Power Management, then set Put display to sleep when inactive for: to 10 minutes (for both On AC ...
6
votes
1answer
727 views

Can you help me write a script to set a new default brightness for the screen/keyboard after login?

On my Macbook Pro Ubuntu alsways boots with... keyboard brightness at maximum illumination screen brightness at maximum illumination ...both which I need almost never during normal usage. ...
6
votes
1answer
580 views

Laptop resumes from suspend while lid is closed [closed]

I have a Dell Studio 15 and I am running Ubuntu 10.10. When I close my lid or select the suspend option, the machine suspends as indicated by the slowly pulsing power indicator. I'll put the machine ...
6
votes
2answers
566 views

Is it safe to configure “Shutdown” on “When laptop lid is closed”?

To setup a laptop owned by a complete PC novice any settings that may become hard to tackle remotely need to be avoided. The laptop will be administrated via SSH. One thing in my list are problems ...
6
votes
4answers
628 views

Other devices in the battery power indicator?

Every now and then, I encounter some mention of other devices being shown in the power indicator. For example, along with the laptop battery, listing the battery level for an iPod being charged over ...
6
votes
1answer
5k views

Intel HD audio codec power management

Is it possible to enable power management for intel-hda sound card audio codec ? Power management for the card itself works fine, but audio codec module (/sys/module/snd_hda_codec) doesn't seem to ...
6
votes
1answer
2k views

Customize the power button action (ubuntu 10.04)

I would like to customize the power button action. The tutorial at http://blog.metalight.dk/2010/07/ubuntu-lucid-custom-power-button-event/ works but not always (the number of shutdown processes can ...
6
votes
3answers
2k views

Shutdown/suspend/hibernate not working correctly

I'm using Ubuntu 11.10 and every thing was good until few days i try to shutdown my laptop but instead Ubuntu goes to the lightgdm login screen. Also suspend and hibernate don't complete: in ...
6
votes
2answers
2k views

How to prevent battery from charging while on UPS

I'm running on UPS power and would like to prevent the laptop's battery from charging, to increase the amount of power available to other devices. Is there a way to do this? update The machine is a ...
6
votes
1answer
647 views

How do I prevent immediate wake up from suspend (version II)?

This question covers one reason a computer might immediately wake after suspend: How do I prevent immediate wake up from suspend? I seem to have a different one. After a recent security patch update ...
6
votes
2answers
2k views

Is it possible to turn the video card off in a laptop to use it as a headless server?

Since I recently upgraded my IT infrastructure, I decided to use my old laptop as a home server. The problem is that the machine sports a powerful nVidia card that even at idle generates enough heat ...
6
votes
3answers
887 views

laptop-mode-tools and harddrive spinoff

So I wanted to extend my laptop battery life. After googleing a lot I found many tips and tricks. Some even in this site as well. Then I found this package in synaptic as well laptop-mode-tools. Now I ...
6
votes
0answers
1k views

How to count battery cycles?

Like most users that have searched know, Manufacturers ACPI implementation is a mess and for most of our laptops, battery info is unavailable or wrong (on a dell inspiron 15z, the rate is divided by ...
6
votes
0answers
1k views

Can not estimate remaining battery time? [duplicate]

Possible Duplicate: Laptop's battery is stuck on “estimating”? After updating to Ubuntu 10.10 from 10.04 Ubuntu can not estimate both the battery time and the percentage ...
5
votes
5answers
10k views

Is Ubuntu Battery Management Better Than Windows?

Is Ubuntu battery management better than Windows ? I have noticed that in Windows 7 a fully charged battery shows 3:30 minutes but in Ubuntu it shows 2:00 hours ... !!! so what is the power ...
5
votes
3answers
1k views

how can I run my script automatically on ac switching

So, I wan't to run it when start work on AC and this or better other script when start work from battery I tried /etc/acpi/power.sh adding symlink to /etc/laptop-mode/battery-start It seems to ...
5
votes
3answers
7k views

Poor battery life in Ubuntu 12.10 on Toshiba p755-s5215, how can i manage background applications?

I have a dual-booted laptop, where windows gives a good 3.5 hours on battery, while on Ubuntu 12.10 my laptops runs only for 2 hours. I heard about powertop and laptop-tools, but after installing ...
5
votes
1answer
8k views

How to prevent XBMC from shutting down or suspending your computer?

Since I run XBMC as a program, and not standalone, I would just like it to exit when I click the power button. The default behavior is to show the shutdown menu, and I don't want to accidently shut ...
5
votes
2answers
867 views

Laptop battery always discharging

I have a fully up to date Ubuntu 14.04 on my Asus X550DP laptop. My problem is that the battery is always discharging. When I plug the AC adapter in, it charges battery up to around 96% and stops ...
5
votes
2answers
4k views

What prevents setting ATI / radeon power_profile from boot and retaining it after suspend?

I'm successfully using the open source radeon driver and use KMS-power_profiles (see link below) for power management of my graphics to prevent overheating. But I can't manage to set the power_profile ...
5
votes
1answer
2k views

How do I keep my screen from going dim when idle?

Apparently, the new version of Unity is based on Gnome 3. Apparently, Gnome 3 decided to do away with a huge chunk of the options available to me. It used to be that when I went to System Settings -> ...
5
votes
2answers
3k views

Laptop shuts down on lid close

When I close the lid of my Asus X77JQ, lucid shuts it down automatically after five minutes. I want to be able to sleep in the same room as my laptop, so I would like to be able to close the lid ...
5
votes
5answers
22k views

How to make my screen brightness not change when I plug my laptop in

I do not want my laptop to change brightness when my laptop power is plugged in or unplugged. I set my brightness based on how bright my surroundings are. If I am in a dark room, I set my brightness ...
5
votes
2answers
17k views

Put HDDs in standby after X minutes using hdparm doesn't work

I use Ubuntu 12.04 on a home server. There are 5 hard drives: one SSD with the OS and 4 HDDs (Samsung HD204UI) configured as a RAID5 using mdadm. I don't need the RAID very often (say, about once per ...
5
votes
3answers
540 views

How can I adjust the time that automatically reduces the brightness of screen?

At the moment it uses just a few seconds of inactivity after that ubuntu reduces the brightness of my screen. Where do i find the option to increase this value?
5
votes
2answers
156 views

Is there any way to make Ubuntu not to suspend while a download in progress?

Is there any way? How to script in /usr/lib/pm-utils/sleep.d to check ${downspeed eth0}, ${upspeed wlan0}, ${upspeed eth0} and ${downspeed wlan0} and to set the system not to suspend while a ...
5
votes
4answers
7k views

How can I find out the current drive spin-down time?

I'm interested in manually adjusting my hard drives' spin-down times with hdparm -S to make them quieter at night. The first thing I need to know is what their current spin-down times are, to use as a ...
5
votes
2answers
4k views

Why does Ubuntu have about 2x shorter battery life than OS X on MacBook?

Ubuntu 12.04 has about 2x shorter battery life than OS X on my MacBook Pro 2010. What are the technical reasons for this? Is it because OS X uses some hidden firmware features? Can Linux somehow ...
5
votes
1answer
95 views

How green are Ubuntu and Canonical?

im a student of Environmental Engineering, currently searching for a Bachelor Thesis Theme. I am curious, if there any internal information about Ubuntu related to CO2/Energy saving compared to other ...
5
votes
2answers
6k views

VLC does not inhibit screen blanking

I have an issue which could be a bug, but before reporting it, I want to make sure I'm not doing something wrong. When watching a movie with VLC on fullscreen, approximately in 10 minutes the screen ...
5
votes
1answer
471 views

Is there a bug report tracking the power regression in the 2.6.38 kernel?

I'm looking for an official bugtracker entry (either ubuntu, or kernel) which tracks the story of power usage regression described in: ...
5
votes
1answer
4k views

My fan is always on but not in MSWindows (HP elitebook 8460p)

Problem: My laptop(new) fan is ALWAYS on. Question: What can I do to solve this issue? Situation: HP Elitebook 8460p Ubuntu 12.04 LTS (clean install, no mod, nothing... really clean... no ...
5
votes
1answer
1k views

My Thinkpad X201 battery is draining extra fast. What can I do?

I got a new Thinkpad X201 last week with the 6 cell battery, which is advertised to work for 5 hours. I installed Ubuntu Maverick on this machine right away. My battery life is only around 2 hours. Is ...
5
votes
1answer
2k views

Lenovo ThinkPad L520 slows down when AC power adapter is plugged in

I have a new laptop Lenovo ThinkPad L520 (7859-5BG) Core i5-2520M(2.5GHz) with 4GB RAM. Having installed Ubuntu 11.10 32-bit, while browsing with Chrome on GNOME classic (no effects), I noticed 173% ...
5
votes
3answers
213 views

How can I wake up my computer from suspend?

After the latest update, my machine isn't waking up from suspend, and I have to hard-reboot it. This only happens sometimes, and I can't tell under what exact circumstances it happens. I think it's ...
5
votes
1answer
645 views

How can I change what action is caused when the power button is pressed?

I want know if there's a way to change the action when the power key is pressed. I use Ubuntu 11.10 and when it is pressed it opens a small window with shutdown options. I want know how to change ...
5
votes
1answer
2k views

How do I enable power management on Ubuntu Server?

I have Ubuntu Server 11.04 installed on an old noisy laptop. Its only purpose is to run subversion and I commit code quite rarely, but the laptop should work all the time. So I would like to know how ...
5
votes
2answers
1k views

Will Ubuntu Server properly manage the power settings on a netbook?

I'm planning to install Ubuntu Server on a netbook to minimize power consumption. Are there any special considerations I should make for this kind of setup? Will Ubuntu Server properly manage the ...
5
votes
1answer
85 views

Notebook wakes up from Standby

I have an Acer Aspire V5 Notebook with Ubuntu 14.04 installed on a SSD an Windows 8.1 on a HDD. I experience that my Notebook wakes up from standby randomly after a certain time (can be a few ...
5
votes
1answer
1k views

Laptop shuts down upon waking from suspend

The computer enters suspend either by closing lid, choosing suspend from the top-right drop down, or hitting the power button and pressing suspend. It doesn't matter. I then attempt to wake the ...
5
votes
2answers
1k views

Ubuntu 12.04 LTS fails to recognize my laptop as laptop [closed]

This is probably going to sound like a rookie question, but I have never ever experienced such issue. I had Ubuntu 11.10 without Unity installed on my old laptop Thinkpad Z60m. Few days ago, I got ...
5
votes
1answer
779 views

Booting hangs at “Checking battery…” [closed]

Ubuntu 9.04 (JAUNTY JACKLOPE version)Installation Guidance REQUESTED. I am a quite new user (more proper to say “..a learner”) of Ubuntu. I am a Sr. citizen. Please guide and help me in the matter ...
4
votes
3answers
3k views

How to shutdown Ubuntu after (2 hours) of idle?

Running: Xubuntu 14.04 32bit. I have read several outdated, not working, working different that I want answers here and elsewhere. I had a script that resulted in shutting my Laptop down at boot time ...
4
votes
2answers
6k views

Closing the lid isn't toggeling standby anymore after update in Lubuntu. How can I fix that?

On my netbook closing the lid only leads to lock screen and not to standby in Lubuntu. That happened after the update on 11. 0. In 11.04 that worked without problem. Also, in 11. 10 Ubuntu (Unity) ...
4
votes
2answers
761 views

How do I detect when my system wakes up from suspend via DBus or similar in a python app?

In a background Python script I need to detect, when the system just woke up from suspend. What is a good way that does not rely on a root script but rather on python modules such as DBus? I'm new to ...
4
votes
5answers
8k views

Does Jupiter really improve battery power?

I installed Jupiter on Ubuntu 11.10 and set the preference mode to "Power Saver" but haven't seen any noticeable difference. Does it really do what it claims?
4
votes
2answers
401 views

How to get a notification when computer is not charging?

My laptop battery sucks, and lasts up to 5minutes without charging. Sometimes the charger falls out without me knowing, making the computer shut off unexpectedly. Is there a way to get a notification ...
4
votes
2answers
977 views

How is the Magic Trackpad's Battery Life (with Ubuntu)

What are other peoples experiences are with the battery life of the Apple Magic Trackpad using Ubuntu? I think I've emptied included batteries after about two weeks usage for five days a week, eight ...
4
votes
1answer
1k views

In terms of battery usage, which distro is more efficient between Lubuntu and Xubuntu?

Installing both on the same laptop without doing nothing more than the normal install, which one consumes less battery power at the end and makes the laptop last a little bit longer than the other, ...