Questions related to power management, particularly power saving measures.

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0
votes
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
8k 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
vote
1answer
835 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
976 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
vote
0answers
378 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
7k 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
vote
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
556 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
727 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 )?
2
votes
2answers
1k 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
vote
0answers
936 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
527 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
508 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
vote
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
votes
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
664 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 ...
1
vote
1answer
341 views

How to configure an Ubuntu virtual server and VMWare ESXi5 the way VMWare would be able to shut it down properly?

I run an Ubuntu 12.04 server as a virtual machine on a VMWare ESXi 5 server. I've configured VMWare to shut the quest machines down the sane way (with an ACPI (if I understand it righ) shutdown ...
1
vote
1answer
263 views

Automatic Power On After Suspend

With every laptop I've had which had Ubuntu installed on it, first my Acer Aspire One and then my Dell Inspiron 15R, when I close it, it goes into suspend mode. When I open it, it attempts to power ...
3
votes
1answer
774 views

How do I make brightness settings persist across rebooting?

I'm using 12.04 with up to date packages running on a Dell Inspiron N4030 laptop with an ATI Radeon HD 5400 graphics card. I'm using the new Catalyst 12.6 graphics driver (this version already fixed ...
1
vote
1answer
7k views

USB hub not working properly Ubuntu 12.04

USB hub acting strange on Ubuntu 12.04 LTS. On Windows all devices are working properly, but on Ubuntu there are several issues, so it is not hardware issue. HDD is not recognised, unless it is the ...
2
votes
1answer
526 views

How do I show grub when resuming from suspend?

I have a Sony Vaio laptop, that came pre-installed with Windows 7. I resized the windows partition, then set up a dual boot scenario with Ubuntu. I've noticed that when I run Windows and put the ...
1
vote
0answers
614 views

Shutdown button not working [closed]

I have 12.04 installed on my laptop. It was working perfectly until yesterday. Since then, no matter whether I choose restart shutdown or suspend option from GUI, my computer suspends. Please give ...
7
votes
3answers
431 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 ...
1
vote
1answer
297 views

My Lenovo W500 resumes from suspend prematurely

In both Ubuntu 10.04 and 12.04, a perfectly happy sleeping laptop is woken when moved. Either the HD-shock detection, the trackpad or a sloppy key will wake it when the lid is closed. To test this I ...
2
votes
3answers
3k 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 ...
0
votes
1answer
937 views

Extremely short battery life

In Windows, my battery lasts several hours. In Ubuntu 12.04, it's dead before an hour and a half. I've installed http://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-management.html but it has ...
1
vote
2answers
4k views

Battery not charging beyong a certain percentage

After checking two HP Laptops, one relatively new, only 2 months old and the battery is less than a week old. The other one is about a year old. both have the same issue. The laptop's battery charges ...
2
votes
1answer
1k views

Will computer being shut down due to power failure affect my system files, or speed in any way? [duplicate]

Possible Duplicate: How resilient is Ubuntu to repeated “power-off” shutdowns? I've asked before as well but need to confirm again, in my country there are a lot of electricity ...
0
votes
1answer
665 views

Will not shut down

My Dell Inspiron 1720 Laptop with 12.04 with latest updates will not shut down when commanded off. After each upgrade it will probably turn off once, the next time it is commanded off, it will shut ...
1
vote
0answers
218 views

Ubuntu won't suspend automatically any more [duplicate]

Possible Duplicate: Unity won't suspend on inactivity In the last month or so, Ubuntu (12.04) has stopped sleeping automatically. I've gone to System Settings > Power, and verified (and ...
1
vote
1answer
729 views

Can't find “/sys/devices/system/cpu/sched_mc_power_savings”

I'm currently working on Ubuntu 12.04 x64. A lot of manuals about power saving in Linux tells about using parameters /sys/devices/system/cpu/sched_mc_power_savings and ...
37
votes
1answer
27k 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 ...
61
votes
17answers
58k views

How to prevent my screen from either dimming or the screen-lock starting 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 ...
3
votes
1answer
4k views

How to analysis the output of powertop to increase battery lifetime

I'm new to ubuntu using 12.04LTS .Please help me by steps.Thanks all. anoy@ubuntu:~$ cat /proc/sys/vm/laptop_mode 5 PowerTOP 1.97 Overview Idle stats Frequency stats Device stats ...
-1
votes
2answers
1k views

MacBook air 3.1 ubuntu 12.04 won't suspend when closing lid, after installing nvidia driver

I just installed Ubuntu 12.04 on my MacBook air I had a small graphic problem described here: Recent LCD trouble with 12.04 on 2010 Macbook Air 11 (3,1). So I followed the answer and installed the ...
0
votes
3answers
3k views

sudo shutdown vs pressing power button

I have a headless Ubuntu server running 64 bit Ubuntu 12.04 server edition, and I connect to the server via SSH from my Windows laptop. Sometimes when I would like to turn off the server and my ...
0
votes
0answers
25 views

Computer reboots when battery is critically low [duplicate]

Possible Duplicate: How do I set the computer to suspend when battery is critically low? I am using Uubntu 12.04, and I've noticed that the computer reboots instead of suspending when the ...
1
vote
2answers
3k views

Hibernate Option not available in Ubuntu 12.04

My Ubuntu 12.04 is missing Hibernate option so after searching a little on Google I came to know that this can solve my problem sudo nano ...
0
votes
1answer
141 views

How do I resume my session?

I have a desktop computer running Ubuntu, which is a very powerful system and I don't want it on all the time, so I would like to use the Suspend feature, but there is one problem: My computer won't ...
13
votes
4answers
7k 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 ...
2
votes
1answer
918 views

How to disable automatic shutdown on UPS battery?

I have a UPS which is configured with Apcupsd. It shows all the stats correctly. The problem is that when I switch to battery mode, something sends a shutdown signal to the PC. My guess is that it ...
4
votes
6answers
5k views

Battery management doesn't recognize removal of power supply

I have a Lenovo Y460p running Ubuntu 12.04 (64-bit). The battery does charge normally, but unplugging the power supply only very briefly shows the correct battery indicator. After about 1 second, it ...
3
votes
1answer
1k views

Is Xubuntu as power-efficient as Ubuntu?

I'm wondering if Xubuntu has the same features as Ubuntu 12.04 Particularly I'm trying to get the most battery life out of my laptop. Does Xubuntu 12.04 feature the same improvements to power ...