Power management refers to the capability of a computer or its operating system to regulate its power usage. This can help achieve cooler and quieter operation, longer-lasting electrical components, and for laptops, longer battery life.

learn more… | top users | synonyms

-1
votes
1answer
41 views

manage hardware power supply

How can I manage power supply? (if it's possible of course). Since my charger doesn't supply the needed energy, I need to reduce/remove power from some devices in order to let my processor run full ...
1
vote
2answers
4k views

What could be causing windows to fail to sleep or hibernate, and revert system settings?

I am running Windows 8.1 on my system (Dell e6520) and the symptoms are this: My PC won't sleep or hibernate. It the screen turns off, but the fans just run and run, and after a little while, it ...
1
vote
1answer
702 views

extract power plans from saved registry

I need to restore Windows 7 power plans. I saved full registry on an old PC (also Windows 7), that PC is not available any more. How can I extract power plans from the saved registry?
1
vote
1answer
264 views

Power scheme not applying in Group Policy

I've created a new GPO and created a power scheme under computer configuration. I've disabled the User configuration part of this GPO. In this power scheme I have the action selected to create a new ...
1
vote
2answers
475 views

Low processor performance after removing and then plugging the power cord

It's really confusing. When plugged in, everything is lagging. On battery everything goes smooth, three times as fast. I looked into power options, set everything to default and tried the three ...
3
votes
1answer
2k views

Off vs standby. Which is better for an office laser printer?

At an office where I work, there is a Samsung CLP-310 laser printer: The staff turn this off every evening. Right off -using the hard power switch on the back. They are trying to reduce their ...
1
vote
1answer
62 views

PC turns off abruptly [closed]

I had to press my PC's power button for about 60 to 90 seconds to turn it on. After it boots it works for about one hour. After this hour the monitor goes blank. Power and hard disk LEDs are ok with ...
1
vote
2answers
421 views

Is it safe to add or remove any type of device while in sleep mode?

Is it safe to add (plug in) or remove (unplug) any device while Windows is in sleep (a.k.a. standby, a.k.a. suspend) mode? What type of devices can be added or removed in this manner? Can you do this ...
2
votes
0answers
45 views

Is it possible to use IGP and Dedicated graphics like nvidia's optimus? [duplicate]

Pretty much like the title says. I'm curious if it would be possible to use my dedicated graphics card for gaming and other intensive tasks, while using my IGP for general usage to get power usage ...
2
votes
2answers
2k views

Execute a command if Linux is idle for 5 minutes

I would like to execute a command such as notify-send 'a' if my Linux machine has been idle for 5 minutes. By idle, I mean the same thing a screen saver that gets activated would use to define ...
0
votes
1answer
142 views

How can I view events that cause laptop screen to turn on from standby (but not sleep)?

On a Windows 7 laptop, is there a way to see exactly what device or process triggered the screen to turn on? I'm referring to the "screen off" mode where the notebook is still on, but the screen has ...
1
vote
2answers
336 views

Hook system power button in Windows

I have a headless computer running a custom service that I want to enable/disable using the power button, rather than having to remotely connect every time. The computer does other things as well, so ...
0
votes
0answers
73 views

Computer randomly powered off at exactly 3 am

I am running a Zentyal server at home, set up to run as a gateway, file server, etc. It is running on a fairly standard computer with standard hardware (Intel i3, 8GB RAM, 300W power supply). A few ...
0
votes
1answer
532 views

Monitor turns on when computer accessed remotely by Remote Desktop user

I am running Windows 7, service pack 1, 64-bit, NVIDIA GeForce 8800 GT. I used Power Options to configure the monitor to turn off after 10 minutes of inactivity. This works fine when I use the ...
0
votes
2answers
5k views

Windows 8 custom power plan keeps resetting itself

I just got a new Haswell laptop, and was experiencing very short battery life: about 3-4 hrs with minimal use. I knew this had to be wrong, so I checked the power plan, and found that "HP Recommended" ...
2
votes
1answer
4k views

How to disallow USB devices to wake the computer by default in Windows 7

Every time I plug in a new mouse/keyboard or plug an existing one to a new USB port, I have to manually go to the device manager, go to the device's property page, and uncheck "Allow this device to ...
2
votes
2answers
367 views

Do ULV Core i5 CPUs consume same power as i7 CPUs if they use same TDP?

Title says it all really: If you have a Core i5 CPU and its TDP is 17W and there is a Core i7 CPU which also has TDP 17W, will they consume the same battery power even though one runs faster? I am ...
0
votes
1answer
447 views

How do I detect Windows turning on/off display (going to away mode)?

I'm trying to find a way to detect when my computer decides I've been away (no user input) long enough to turn off the display. That also means I'm not watching movies and the OS is not prohibited ...
1
vote
1answer
2k views

disabling power save option on wifi device

I use usb wifi dongles that have AR9271 chipset and use compat driver 3.9.1 - ath9k_htc. I use the wifi units to create an ad-hoc wlan. When there is no communication for a while, the nodes leave ...
2
votes
3answers
4k views

Modify “plans shown on the battery meter”

I always use Power Saver or High Performance. No in between for me. How can I rearrange the plans so that those are the two in the top section?
1
vote
2answers
57 views

How to Lower Power Consumption while still running tasks? [closed]

On my pc, I have Norton 360 installed. Since it takes up lots of resources, I usually just leave it on while I let it scan my computer, but I'm starting to think it takes up a lot of power. Is there ...
0
votes
1answer
43 views

Dynamic Power Usage

This is more of a theoretical question, but if it is actually possible, I'd definitely like to look into implementing it. Basically, I'd like to have my computer (Core 2 Quad Q6600, Nvidia 8800 GT ...
0
votes
1answer
2k views

Windows 8 on Surface Pro goes to sleep on lock screen despite “High Performance” power settings

On a Windows 8-enabled Microsoft Surface Pro I have a "High Performance" power mode selected. When the device is locked via Win + L it still goes to sleep after a minute or so. Screen saver is ...
1
vote
0answers
46 views

Can I prevent Windows 7 from restoring my brightess setting when the power state changes?

I have a question regarding Windows 7. I have set different values for the screen brightness when on battery and when on AC power (in the power plan settings). If I manually change the brightness of ...
1
vote
0answers
496 views

Battery alarms and notifications don't work in Windows 8

It's about some months that I have a strange problem with my laptop battery. In the past, whenever my laptop went about 10% of battery, my operating system Windows 8 showed a notification alarm to ...
15
votes
7answers
11k views

My Windows 8 PC wakes up every night around 3 am

I just built a new Windows 8 PC, and started using it a few days ago. Every night, I use Hibernate on the computer before I go to bed. The only way to turn it back on is to hit the Power button. ...
2
votes
3answers
1k views

What is the difference between an USB hub with external power and without?

I have a 7-port USB 2.0 hub (this) which comes with external power supply in its packaging. However, when I connected a lot of USB sound cards (Creative SB X-Fi Go Pro! or ASUS Xonar U3) to the hub I ...
0
votes
1answer
39 views

Mac OS X sleep mode

I am a new Mac user. I need to return to the MacBook continuously with varying amounts of time in between. However, the Mac goes into sleep mode breaking the tasks it was doing. I have figured out ...
6
votes
1answer
553 views

is it possible to wake up a Linux device at a specific time

I run Debian on an embedded board. I would like to suspend or hibernate the board say at 10 pm and wake it up at 7 am. There is no problem to suspend/hibernate the board by pmi action ...
0
votes
0answers
633 views

windows 7 professional desktop goes to sleep even after setting sleep to “never”

Dell desktop goes to sleep and prevents my being able to log me in even after I set the power settings to never sleep mode. I have checked whether its hibernating and it is not. Wonder what other ...
1
vote
2answers
523 views

How do you make the computer locked when the monitor is turned off but power not off in Windows Vista?

I have a power management setting (set up through the Control Panel) that turns the monitor off after 5 minutes of idling but keeps the power on all time, if the laptop is connected to power. Under ...
5
votes
2answers
2k views

Is it possible to create individual power settings for each hard drive?

I have a number of different drives that I use for different purposes but I only use two of them frequently. I would like for the others to enter sleep mode when not in use, but never my main two. Is ...
1
vote
1answer
309 views

Low framerate on background apps

My problem is that when a game is running in the foreground, in Full Screen mode, any applications on my second monitor (such as youtube videos, videos, not app specific) drop their frame-rate to ...
6
votes
4answers
4k views

Close lid option “Do nothing” absent

I just unpacked my new Sony Vaio, with windows 8 pro installed. Everything is nice, so I tried setting my power management options. The "When I close the lid" option only list: Hibernate Sleep ...
0
votes
0answers
88 views

On ubuntu 12.04 the video, after some day of working, turn blank

I have a PC with ubuntu 12.04 which is connected to a video with a resolution of 1366x768, without mouse and keyboard. It happened that after some days of work , without any external input, but only ...
1
vote
0answers
89 views

Windows should display warning when on battery

I have purchased my first laptop recently. But, the problem is many times I forgot to connect it to power supply. Due, to which all of my battery get exhausted and I get warning when it is only 10% ...
0
votes
2answers
782 views

How do I tell if my computer supports hibernation?

In Windows Vista, there is regular Hibernation as well as a Hybrid Sleep mode. These features can be found and enabled in the Power Options dialog (advanced settings). For some reason, I don't have ...
0
votes
1answer
210 views

How does a computer crash while powered off?

When I put my desktop computer in sleep mode I can simply wake it up by pressing a button on the keyboard. Easy! But whenever there's a power outage the computer needs to do a complete boot up to ...
7
votes
1answer
470 views

What are the recommended power settings for VMs?

What power options should be changed in Windows when it is running on a virtual machine? We are using VMWare and the possible OS's are any of several still-supported versions of Windows. For example ...
1
vote
0answers
66 views

Linux : governer set to userspace in kernel but is always set to ondemand after the system's booted

I am using the 3.2 Linux kernel on a custom ARM board with Debian Wheezy. My kernel config. for power management is below. I want the system to default to the userspace governer (which the kernel ...
1
vote
1answer
3k views

Can I power up a Mac with a keyboard shortcut?

I have a Mac Mini 2011 with Mac OS X X 10.7.5 and I want to power it on with a keyboard combination when it is off. When the Mac is in sleep mode, you can just press a key or move the mouse to ...
3
votes
1answer
343 views

Closing the lid of laptop slows down downloading files [duplicate]

I would like to download files from the intelernet on my lenovo laptop with windows 7 when the lid is closed. Unfortunately the download slows down almost to zero when the lid is closed. Answers to ...
1
vote
0answers
193 views

How to create power profile with power.cfg in Windows 7

My power managment profiles has vaporized I cannot edit them, delete or make new ones cause every new one is copy of the existing which is corrupted. I found out that there is tool called power.cfg ...
0
votes
1answer
835 views

How to find different Intel processor's P-states?

Different p-states will let processor core work at different frequency level and voltage level. It's enabled by Intel Enhanced Speedstep technology. I want to do some power management research. ...
1
vote
0answers
261 views

How to prevent “lock” on screen power-off in Windows 8

If my screen turns off due to power saving settings in Windows 8 the PC gets locked also. Is there a way to delay the locking another minute? I have no screen saver set (where the lock setting would ...
0
votes
2answers
555 views

Does running a dual-core processor with one core disabled reduce power consumption?

I have a Core 2 Duo laptop, and I want to extend my battery life as long as possible. If one was to use an uniprocessor kernel, the second core should not be 'booted' for use by the OS (for lack of ...
1
vote
1answer
1k views

powercfg /devicedisablewake gives invalid parameters error

I've trying to solve a problem like the one described in Laptop starts up by itself after being in Hibernate but unfortunately the common suggestion of using powercfg to disable the LAN adapter from ...
0
votes
0answers
58 views

Manually checking/changing power state of Intel Centrino wireless in Windows

Windows gives a couple options to manage the power of Intel's mobile Centrino wireless card line in the Advanced Power options menu. Does anybody know of a way to manually (ie, not using Windows' ...
0
votes
1answer
376 views

How to poweroff CD drive in Windows 7 [duplicate]

I am running Windows 7 64 bit on Lenovo W510, I wish to poweroff the CD drive. The power manager sometimes switches off the power when I am running on batteries. Is there a way I can do that myself. ...
1
vote
1answer
585 views

Power management in Solaris 11 using poweradm?

In Oracle Solaris 11.1, pmconfig had completely vanished, and poweradm is available instead. While pmconfig was still available, I used to... Auto suspend : Let my server suspend from 2 AM through 7 ...