Questions related to power management, particularly power saving measures.
54
votes
6answers
29k views
How can I tell Ubuntu to do nothing when I close my laptop lid?
I would like closing the laptop lid to be a no-op. How can I do that?
25
votes
2answers
6k views
Is there a power saving application similar to Jupiter?
I have installed the 13.04 final release and so far I am loving it more 12.10. I'm trying to install the Jupiter power settings app but, I read it is no longer compatible with the new kernel. Is there ...
24
votes
4answers
10k views
Why does my computer get less battery life with Ubuntu compared to Windows?
Last year I purchased a Dell Inspiron 5315 laptop shipping with Windows 7 preinstalled. I installed Ubuntu 10.10 alongside it with dual-booting. On upgrading to Ubuntu 11.10, I was upset to find I now ...
23
votes
1answer
9k views
Is “laptop-mode-tools” still relevant for 12.04 and the 3.x kernels?
I'm using Ubuntu 12.04 x64 and trying to choose power management software. Laptop-mode-tools have a lot of features, but the only reason why I'm worry about is that it's manual and config files are ...
21
votes
6answers
1k views
Forcibly underclocking at night
My desktop stays on all the time. It acts as a server and also performs other semi-essential household tasks. During the day it uses the OnDemand CPU setting. This essentially just scales the CPU ...
18
votes
2answers
5k views
How to prevent my screen from dimming when watching YouTube?
My screen brightness used to dim after a few seconds to preserve battery. This is default in Ubuntu 12.04. However when watching video it should not dim.
This works correctly when I watch videos ...
17
votes
0answers
10k views
Battery life decreased after upgrade to 11.04 [duplicate]
Possible Duplicate:
Why does my computer get less battery life with Ubuntu compared to Windows?
After upgrading from Ubuntu 10.10, my battery life has decreased dramatically.
There was a ...
16
votes
4answers
4k views
How to go automatically from Suspend into Hibernate?
Is it possible to make Ubuntu go into Hibernate state from Suspend, aka "Suspend Sedation"?
For example, my laptop is set up to go into a Suspend once I close the lid. If then I don't use it for ...
14
votes
7answers
11k views
Laptop minimal power consumption tweaks
I've recently installed Ubuntu 11.10 on a new Lenovo X220 laptop with a 9-cells battery. I have a trans-atlantic flight coming up, and I would like to use my laptop during it. Lenovo claims that ...
14
votes
1answer
1k views
Is there ongoing work in the kernel team to improve battery life under linux?
I have read in some forums that the kernel team is working on improving battery life and energy efficiency in linux. Unfortunately our community really lags behind windows and mac in that regard. I ...
13
votes
2answers
2k views
How to turn off the display via the command line?
Is there a way to turn off the display (enter power saving mode) using a command?
For example, when the computer is inactive for a specific interval, the screen turns off to conserve energy. Is there ...
11
votes
3answers
5k views
Will final version of 12.04 use the power management changes found in kernel 3.3
I have seen in some version of Ubuntu that instead of making a huge change to update to the latest kernel, they take some of the good stuff out of it, for the sake of stability and put it on a ...
11
votes
5answers
13k views
How do I completely turn off screensaver and power-management?
I looking for a method to turn-off the screensaver and powermanager but from the command line.
I'm aware this can be done via the GUI screen - but can this be done via the command line or via some ...
10
votes
3answers
12k views
How can I control HDD spin down time?
I have 2 HDDs in my PC. Ubuntu is turning off the secondary HDD very quickly after about 15 minutes, which is short for me. I need to control this time. How can I do it?
I tried GNOME power ...
10
votes
3answers
1k views
Stop laptop from suspending when closing lid in lightdm
How do I stop my laptop from suspending when closing the lid under lightdm - the power management settings in xfce or gnome 3 does not seem to apply when the window manager is not running.
10
votes
4answers
1k views
Cutting desktop power usage
I'm on a general energy saving mission. I've finally swapped my old CRT monitor for a LCD, so the next step it to optimise the PC power usage. It's using an AMD 64 X2 4600+ CPU which I know can ...
10
votes
0answers
4k views
Battery drain on ubuntu is fast [duplicate]
My battery drain on win7 is less than that of ubuntu (around 45 min of difference).
Can you advice me something to get best battery performance on my laptop?
when I decrease the brightness it remains ...
9
votes
2answers
2k views
How can I get the percentage of my battery life from the command line?
This question tells me how I can find the state of my battery from the command line.
While this is useful information sometimes I need something quicker, basically like the percentage or enough for ...
9
votes
2answers
504 views
Why does powertop still detect tunable settings on >12.04?
According to this Q&A laptop-mode-tools and powertop are not needed anymore with ubuntu 12.04 as the power savings are now included in the kernel.
So I decided to remove laptop-mode-tools from ...
8
votes
4answers
2k views
Netbook performs hard shutdown without warning on low battery power
My Asus EEE netbook performs a hard shutdown when it reaches low battery power, without giving any warning - i.e. the power just goes off, without any shutdown process. I can't find anything in the ...
8
votes
5answers
7k views
How to save brightness settings?
After I upgraded my notebook to ubuntu 12.04, I found that I can not save my power settings. Every time I set the screen brightness to 70%, it restored to 100% next time. I can't find a save button on ...
8
votes
3answers
2k views
Kernel patch that solves battery issues when for ubuntu ? [closed]
http://www.phoronix.com/scan.php?page=news_item&px=MTAxNDM
When will this come for ubuntu ?
I am getting tired with my 11.10 dieing at little over 50 minutes of battery when at the most extreme ...
8
votes
3answers
2k views
Checking laptop's battery state in a terminal [duplicate]
Possible Duplicate:
How to check battery status using terminal?
I want to find out whether my laptop is plugged in to AC power or not using the command line. How can I do this?
8
votes
2answers
9k views
Ubuntu 12.10 “Turn screen off when inactive for: Never” still turns off
After a fresh install of Ubuntu 12.10, my screen still goes off after about ten minutes. I've been to the Brightness and Lock control panel. The Turn screen off when inactive for: setting is set for ...
8
votes
3answers
1k views
System shows “Battery Critically low”
I am using Ubuntu 11.10 on VAIO . Whenever I unplug the charger from my laptop, there comes a dialog showing "battery critically low" and system suspends, even when the charge is 100%.
8
votes
2answers
6k views
How to charge the battery till 60-80% only?
I just got my laptop's battery replaced and read a bit about how to prolong it's life. Most people say that the best choice is not to charge it will 100%, but rather to 60-80%. My battery is quite ...
7
votes
2answers
665 views
Where does gnome-power-statistics get its data from?
Gnome-power-statistics is run when you click on the battery icon in the top panel of a laptop. It shows battery history such as charge and rate, as well as statistics such as discharge profile and ...
7
votes
1answer
3k views
How to change critically low battery value?
I would like my laptop to hibernate itself when the battery level is 10% to be sure it has enough power to complete the operation properly. Actually if I don't pay attention my laptop informs me it ...
7
votes
4answers
11k views
How do I disable my system from going to sleep?
I am getting a web server setup at home on an older AMD 2400+ desktop. I have Ubuntu 11.04 installed and running however, after a time, I can no longer browse to the server. When I go to the keyboard ...
7
votes
3answers
290 views
Hard-drive fails to boot if suspend was activated prior to restarting. Booting a live USB/CD fixes the issue (temporarily)
I am running 12.04 64-bit and am dual booting with Win7, for full disclosure, although I suspect that has nothing to do with my problem.
The boot-loader(GRUB) fails to load often and I will be ...
7
votes
4answers
856 views
Suspend when critically low power 11.10
Is there a way to suspend when Ubuntu is at critically low power. The only option in Ubuntu 11.10 power setting is to shutdown or hibernate. I run my battery all the way down till it suspends then i ...
7
votes
1answer
1k views
Replace XFCE Power Manager with Gnome Power Manager
Is there a way to "swap-out" the existing XFCE power manager in a Xubuntu install with the more common GNOME power manager without breaking the install?
Am having problems with the xfce power manager ...
7
votes
0answers
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 ...
7
votes
1answer
309 views
What Activities Stop Computer from Sleeping
I generally set up power hungry servers with a fairly short timeout before they're supposed to suspend or hibernate, but they seem to occasionally go to sleep during file transfers, ssh sessions, etc. ...
6
votes
5answers
7k views
How can I hibernate from GNOME Shell?
GNOME Shell doesn't have an option to hibernate in the session menu. I checked the GNOME Shell Cheat Sheet but hibernate is not mentioned there.
How can I hibernate my machine from within a GNOME ...
6
votes
2answers
2k views
Why is wireless down/strange after switching to battery or closing/opening the lid?
I noticed that, when I unplugged my laptop, or closed/opened the lid, my wireless connection dropped, every time.
I tracked it down to pm-powersave, and made it stop, see below.
This could also ...
6
votes
1answer
456 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
2answers
419 views
How do I set the computer to suspend when battery is critically low?
I accidentally clicked on the option "When power is critically low" under System Settings>Power. The original entry was blank, but the only two options after I clicked were Hibernate and Shutdown. I ...
6
votes
2answers
2k views
How do I get “restart” option in the shutdown menu in Unity?
The dropdown menu I get when I click on the gear link in the top right corner only shows these options:
Lock Computer
Logout
Suspend
Hibernate
Shutdown
There is no "restart" or "reboot".
How can ...
6
votes
1answer
700 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
5k views
High Idle CPU temperature under Ubuntu, but not Windows
I have a Dell Inspiron Mini 1012 running Ubuntu 10.04 and Windows 7 Starter in a dual-boot configuration.
The CPU runs much cooler in Windows than it does in Ubuntu, even when the CPU has been ...
6
votes
4answers
409 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
453 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
1answer
4k views
How do I prevent an external monitor from shutting off when closing my laptop lid?
I've seen this issue on previous versions of Ubuntu, but not on 12.04 and some of those are resolved bugs, so I'm asking again.
I've set up power management so that, when plugged in, my laptop does ...
6
votes
1answer
1k 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
2answers
889 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
1answer
918 views
Linux kernel regression on power usage
Webupd8 reported this power management fix for the 2.6.38 Linux kernel regression:
Add the following to the boot grub line "pcie_aspm=force"
My question - how does this suggested fix differ from ...
6
votes
2answers
2k views
Can APC ups wake powered off machine up when AC power is back?
I have used apcupsd under ubuntu to power off my machine when AC power is lost via serial.
Is there any way let the UPS to wake up already powered off machine when AC power is back?
I have tried to ...
