Questions related to power management, particularly power saving measures.

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1answer
931 views

Toshiba “eco mode” equivalent

I have a Toshiba Satellite R830 dual-boot Ubuntu 12.10 and Windows 7. On Windows, when I turn "eco mode" on, the fan is much more silent and temperatures are considerably lower. On Ubuntu, eco mode ...
2
votes
1answer
4k views

Screen turns off after inactivity

My screen turns off if I'm inactive for some time, even though I disabled the setting. It happens on battery as well as on AC power. My Brightness and Lock Settings: My Power Settings: Does ...
3
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6answers
9k views

Brightness control doesn't seem to work on a Toshiba Satellite M115 laptop

I have Ubuntu 12.04 LTS on a Toshiba Satellite M115 laptop. The brightness control doesn't seem to work with the "brightness and lock" setting or fn+f6 and fn+f7 (which usually works in Windows). How ...
1
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3answers
3k views

Power & Sleep Management

I'm running 12.10 with xmonad. Trying to ensure that the right things happen when I close laptop lid, etc. I see Internet search results for similar issues that mostly point towards ...
0
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1answer
614 views

How to disable KDE suspend/screen lock notifications?

Every time I close the lid on my laptop it plays a sound. Similarly, I'm getting a notification that the screen has been locked when I wake it up again. I've looked under KDE power management system ...
2
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0answers
346 views

12.10 shutdown/power-up issue

I have just upgraded to 12.10 on a Shuttle XPC which I use mainly for XBMC and have a problem with shut down/power up. When I shut down from within XBMC the box seems to shut down correctly, but it ...
1
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1answer
1k views

find out which process wakes my hard drive from sleep state

I have an external drive connected to my computer, I want this drive to be in sleep mode unless i'm executing some backup tool. For some reason, after 14 minutes I think, the hard drive always wakes ...
7
votes
2answers
4k views

Modify actions when battery is critically low?

I am running Ubuntu (not Xubuntu) and am using Xfce4 on my laptop. When my laptop battery is critically low, Ubuntu/Xfce4 performs some action (perhaps hibernate?) which causes my laptop to shut down. ...
4
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0answers
865 views

How to control of battery charging/discharging limits?

I'm running HP 530 laptop and Ubuntu 10.04. My old battery is died some times ago, so I have got the new one. I'd like to get possibility to change the limits when the charger starts to charge ...
0
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1answer
1k views

Battery on Ubuntu 12.10 is less compared to win7! [duplicate]

I installed ubuntu 12.10 alongside win7 ultimate on my lenovo ultrabook U410, but the problem is I get 6 hours with win7 while only 3.30 hours on Ubuntu. I installed PowerTop but It does not provide ...
1
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1answer
2k views

Reboot only shuts down and doesn't actually boot again

I'm running a fresh install of Ubuntu 12.04 Server on an abmx rack mount server. When I attempt to reboot with sudo shutdown -r now, the machine just shuts down and doesn't come back up without me ...
2
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1answer
1k views

Problem resuming after suspend in Ubuntu 12.04

I've installed Ubuntu 12.04 on my Macbook (white). Whenever the OS goes into Suspend after being idle for some time, it does not resume upon hitting a key or moving the mouse. I have to bring down the ...
2
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2answers
2k views

Set Idle Time in Ubuntu 12.04 Server

I recently installed Ubuntu 12.04 Server and am looking for away for get the server to suspend after an idle time. When using the desktop version I could use the Gnome powersaving tool to specify the ...
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 ...
0
votes
1answer
1k views

High power consumption on latest versions of Linux distributions

I have a Sony Vaio E series and I installed both Ubuntu 12.04 and 12.10. In every case, my battery life is reduced of almost a half with respect to Windows 7. The power consumption with no program ...
2
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2answers
3k views

Brightness resets to maximum after every reboot. Need some help [duplicate]

I have a UX31-E Asus Zenbook running 12.04 until today when I tried 12.10. I've experienced this issue on both versions of ubuntu. I have tried turning the brightness down manually through the ...
3
votes
1answer
1k 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 ...
2
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2answers
843 views

ubuntu 12.04: Why my laptop is consuming more power than 11.10?

I had 11.10 X86 on my Asus laptop (sandybridge, Nvidia 520M). I had 8 hours' battery life with Bumblebee and Jupiter. Average battery discharge rate was around 10w. Later I changed, not upgraded, to ...
2
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1answer
732 views

Suspend on power button when session is locked

Is it possible to configure Ubuntu so that the power button causes suspend regardless of whether the session is locked or not? See here, for example. That configuration does not work, however, if the ...
0
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1answer
7k views

Power Savings and Performance Modes on Ubuntu System

This might be the only thing I miss from windows. There is no way to tell the system to run in high performance mode or in power saver mode. May be this feature which is already there and I am ...
1
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1answer
1k views

Reducing power consumption of Intel chipset

I've just installed Xubuntu on my Samsung 530U (SSD version) and everything works find, but the battery life is dramatically lower comparing to Win7. Full battery is able to work about ten hours ...
2
votes
1answer
5k views

ACPI _OSC control

I've noticed an error from dmesg output that ubuntu canot enable ASPM: [ 0.192722] pci0000:00: ACPI _OSC support notification failed, disabling PCIe ASPM [ 0.192728] pci0000:00: Unable to ...
6
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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 ...
0
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1answer
738 views

Restore default power settings on Ubuntu 12.04

I've noticed that Ubuntu 12.04 restarts instead of hibernating or when the battery power is below the critical level, and then continues restarting until the battery runs out, and power is lost. Is ...
2
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4answers
1k views

How to reduce power consumption in ubuntu?

Why does Ubuntu use more power than Windows? Which is the best energy manager?
10
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2answers
4k views

Won't Hibernate when Battery Critical

Ubuntu 12.04 64bit refuses to hibernate when battery is critically low. Instead it does a complete shutdown which is unnecessary and can cause loss of data. I have enabled Hibernate (pm-hibernate) ...
0
votes
1answer
171 views

Can a broken power supply freeze Ubuntu?

Several months ago my Ubuntu 10.04 started to freeze some minutes after booting. I didn't reboot, just get stuck (mouse, keyboard, etc.) One day it didn't boot at all - ut was dead. I tested the ...
0
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2answers
2k views

Reducing power consumption of second HDD

I'm getting a laptop tomorrow with an SSD as the primary (operating system) drive, and I will be putting my old laptop's HDD into it as a secondary drive for holding music etc. Since HDDs use power ...
7
votes
2answers
9k views

How to keep battery charge at 80% to increase its lifespan

Lithium-based Batteries are not supposed to constantly sit a maximum charge. This damages them and reduces their lifespan. This is why some people take the battery out when using the laptop plugged ...
10
votes
3answers
7k views

How to turn off screen (DPMS) together with locking session in KDE?

First of all, I'm aware a similar question for GNOME is asked here: "Switch off laptop backlight when locking screen". Objective I would like to turn off my screen on locking the session for power ...
1
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1answer
839 views

Why can't I hibernate my Ubuntu 12.04? [duplicate]

Possible Duplicate: How to enable hibernation in 12.04? I use Ubuntu 12.04 and don't have the hibernate button anywhere. Isn't there any way by which I can set up the hibernate button ...
2
votes
1answer
1k views

How to add “shutdown” to the list of “when the lid is closed” in power settings? [duplicate]

Possible Duplicate: How do I modify the power options? I'd like to shutdown my laptop by closing the lid; but in Power Settings there's no option to do that. Is there any way to add ...
3
votes
1answer
1k views

How do I control the fan on a Apple Mac Mini?

I am running 12.04 LTS on Apple mini hardware (about 4 years old). The fan seems to run non-stop. "ThinkFan" is installed but I do not know how to use it in order to modulate fan speed. The ...
1
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0answers
379 views

Can't wakeup after lid was closed [closed]

I change my settings to "When lid closed -> nothing", but when lid closed, it go to suspend and I can't restore it, when press any button. Effect after pressed is not restore, but reloading or ...
3
votes
1answer
2k views

How do make my screen brightness not change when i charge my laptop

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 ...
3
votes
4answers
8k views

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 ...
1
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2answers
175 views

Removing AC power when laptop lid is closed doesn't suspend

While the laptop lid is closed, when I remove external power, the laptop does not suspend so i have to open the lid and close to make it suspend. When the laptop lid is open, then I remove power, ...
4
votes
1answer
160 views

Limiting what resumes computer from suspend

I'm having a ton of trouble getting Suspend to work with my laptop. I want to start using Ubuntu but this is a pretty important aspect since I take my laptop with me everywhere. Anyways, I wanted to ...
3
votes
2answers
568 views

Which one consume less battery in Ubuntu (generally Linux) Ethernet cable or Wireless?

I am wondering when i want to connect to network, it is better use my wireless adapter or using cable (ethernet adapter), Which one consume less battery? Sometimes i saw that my battery life was more ...
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 ...
2
votes
2answers
5k views

reduce Screen brightness in battery mode automatically

KDE and XFCE4 has a program to adjust the screen brightness automatically in battery mode to a preset value. How can i set the same with Unity ( or Gnome3 )?
3
votes
2answers
2k views

How to prevent suspension when a program is currently running?

Is there any way to make Ubuntu 12.04 understand when it should suspend or not in terms of the software that is currently running? For example, if I am installing something and it takes more than 10 ...
1
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0answers
942 views

Lowering GPU temperature on Radeon 6850 with open source driver

I read and tried this and it doesn't work for me! when I type echo "mid" > /sys/class/drm/card0/device/power_profile I see what this value really changed (needs the chmod was applied before, ...
4
votes
1answer
532 views

Is there a program that can adjust display brightness according to battery percentage?

When i work in Kubuntu, KDE power management has a section that lets you automatically adjust display brightness according to battery percentage. I want to know if there is a tool like that in Ubuntu ...
0
votes
1answer
510 views

Can i install “jupiter-support-eee” package on non eee laptop?

I have installed "Jupiter" on my Sony VAIO VPCZ2 laptop. it is very useful for me. I want to know what is the functionality of "jupiter-support-eee" package? is it only for eee netbook? can i install ...
1
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2answers
193 views

Where can I locate the file that handles power configurations and HDD parameters?

I'm trying to compare the differences between how power management is handled on battery and when plugged in. As a result I want to look at the config files for the two instances. Thanks in advance.
6
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2answers
18k views

What is the command for sleep/hibernate? [duplicate]

Possible Duplicate: How can I suspend/hibernate from command line? I have an Acre Aspire One and this netbook does not have a sleep function on the key board and with the removal of the ...
2
votes
0answers
147 views

Getting the external hard-drive faster into standby

Currently, my external hard-drive is going into standby after 15 minutes of inactivity. How can I reduce this period to e.g. 5 minutes? Using Ubuntu 12.04 64-bit with Gnome Shell. Thanks in advance! ...
0
votes
2answers
668 views

Is there any equivalent for Jupiter for Kubuntu?

I am looking for a software like Jupiter for my Kubuntu 12.04 to reduce my battery usage. I want to know, Is there any equivalent for Jupiter for Kubuntu ? or how can i run Jupiter on Kubuntu? ...
2
votes
2answers
4k views

Unity won't suspend on inactivity

Running 12.04. I can manually suspend the system and wake it up again, but I can't get it to suspend on inactivity automatically. I have it set to "Suspend when inactive for" 10 minutes in ...