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.

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Wake-on-lan from S5 and prevent network card from turning off

I'm tired googling and looking through hundreds of forums, please help. OS: Windows 7 64-bit Motherboard: ASUS M4A77T/USB3 Onboard network card: Realtek® 8112L The problem is that network card keeps ...
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1answer
52 views

Why does unplugging my laptop from power reduce power consumption?

I want to save unneeded energy. Because of that, I changed my energy settings to power save mode. However, once I switch off the power supply for my laptop, the energy consumption and CPU tact goes ...
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22 views

Screen brightness

I bought a new Core i7 HP Pavilion 15-r122ne with Windows 8.1 preinstalled and Nvidia Graphics. I am new to Windows 8. When I am using laptop on battery and I launch different apps or pages the ...
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75 views

“No Battery is Detected” but battery works

The Question: How do I get my battery to be detected again? My system is dual boot Windows/Linux. On Linux, for a while, the system claimed that the battery was always at 15%. Now, it says there's ...
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1answer
357 views

Stop Windows 7 poweroff on critical error

How do I stop Windows 7 from powering off in the even in the event of a critical system error (or whatever error causes that)?
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2answers
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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 ...
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16 views

Strange behavior checking disk power state

After sending the command to put a traditional hdd drive to sleep, via hdparm -y , I get a very strange behavior: If I execute this command: while [ 1 ]; do smartctl --nocheck standby -i /dev/sdb ...
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6answers
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Prevent Windows 7 from enabling power saving on USB 3.0 hub

I have installed a USB 3.0 hub on my desktop computer. I use it to connect an external USB 3.0 disk for backup purposes, and I have a problem: Windows 7 enables by default power saving for said hub, ...
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6answers
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windows 8 screen shutting off too soon

I went to the power options and changed the settings to make it wait ten minutes before shutting off the screen, but the screen still shuts off after a minute, I've tried setting different time ...
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2answers
2k views

Slow computer on low wattage charger

I run windows 7 on a Dell latitude laptop. I use on my laptop a charger from another, older laptop - both Dell. I got this message: The battery charges very slow - I understand this, not enough ...
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2answers
510 views

Is there any way to disable automatic head parking of a HDD?

My hard drive semms to park its head after X minutes, and when I access it again it loads the head in a fraction of a second (causing a small beep),and causing disturbances to media streamed from it. ...
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1answer
71 views

What is the procedure for totally disabling HDD spin down on Windows 8?

I'd like to totally disable all HDD spin down on my system that I use for music production. Is Control panel/Power options/.../Turn off hard disk after the place to go or are there any other settings ...
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1answer
177 views

What is the best free method of approximating Windows 7 power management in Windows XP? [closed]

I previously had Windows XP Tablet Ed. on my HP TC4400. Now I have Windows 7 installed on it and I've noticed quite a substantial increase in battery life, in particular when using the power saver ...
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1answer
12k views

How to keep a hard drive from going to sleep?

I have two hard disk drives in my Windows 8 desktop. The issue I am having is that the secondary hard drive goes to sleep frequently (I assume do to inactivity while I am only using the primary ...
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7answers
13k views

How do I stop laptop from underclocking?

My Dell M1530 never seems to run at its full clock speed, regardless of the tasks I throw at it. To diagnose this I have my Dell M1530 configured to use 100% CPU clock speed at all times (regardless ...
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1answer
18 views

Setting up customizable power options for different activities (reading, listening to music, etc.)

How can I set up various configurations of customized power options for different activities? Settings I would like to configure: Reading Mode -> screen never goes to sleep, low performance, dim ...
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5answers
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Windows 7 Goes to Sleep in conflict with Power Option Setting

My Del Dimension E521 running Windows 7 puts itself in sleep mode each night -- despite the fact that I have chosen a power option that specifies NEVER Each morning I find the monitor blank and I ...
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0answers
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How accurate is Windows Power Plan timers?

I configure a power plan to put system into sleep in 2 minutes, and then apply the plan. I observe the system sleep time from the last keyboard or mouse input, and the results vary from 1 min 40 s to ...
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2answers
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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 ...
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0answers
43 views

How can I set the hard disk spin down time per drive in Windows 8? [duplicate]

I'd like to set the hard disk spin down time for each drive individually on a Windows 8 system. One drive that is not used so often could be allowed to spin down, and another one that is used for ...
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5answers
59k views

How to turn off the display in Windows 8 without locking or making computer go to sleep?

How to turn of the display in Windows 8 without locking or making computer go to sleep ? The problem is that when I enable ‘Turn off display after x minutes’ feature from control panel, the device ...
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4answers
12k views

Does a UPS charge it's battery even if my computer is turned on?

I bought a new UPS and the manual says something like "the UPS must charge for 24 hours before it can work properly..." My question is, does it charge even if my computer is turned-on or should I ...
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1answer
157 views

it possible to disable HDD after 20 min idle but not SSD (Windows 7) [duplicate]

Hello my operating system is Windows 7. I have 3 hard drives: 1 SSD (which hosts Windows), 2 HDD (just a file storage) Is it possible to turn off HDD after some idle time but leave active SSD? I ...
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1answer
129 views

Unable to start computer with docking station button while connected to a docking station and laptop lid is closed, but when open, works fine

Basically I am placing a laptop on a docking station within a cart and placing the laptop inside the cart and closing the lid, then connecting an external monitor to the cart w/ keyboard and mouse ...
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121 views

how to configure wifi power management in debian jessie

I have a plain Debian Jessie installation on my Thinkpad x230. Everything works smooth but I noticed that wifi powermanagement is set to 'off'. I can activate power management manually but after ...
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5answers
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How do I set my power plan to turn off the display in less than 1 minute?

The lowest setting in a Windows power plan under "Turn off the display" is "one minute". How do I set it for 30 seconds, 15 seconds, et cetera? I found that the shortest idle duration time you can ...
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82 views

Repeatedly the “turn off the display” setting is set to “less than a minute” - what's the cause?

I have this problem at my helpdesk: On a Windows 7 computer the screen goes into standby mode just a few seconds after a key is hit or the mouse is moved. Looking into the Power Options in the ...
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23 views

Are default NUT settings fine? (about UPS configuration)

On Debian Linux jessie: After buying an UPS and installation of nut-server and nut-client at my PC and configuring the ports and the protocol, do I need to adjust time and/or percentage parameters, ...
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1answer
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Power plan keeps getting changed to 'turn off after 20 minutes'

In Windows 7, I go into the Control Panel and select the Always On power plan - it should never turn off the display or put the computer to sleep, but it keeps reverting to turning off the display ...
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2answers
8k views

Diagnose slow wake up from sleep

My new work computer (Dell Precision T3600, 16GB RAM, SSD) running Windows 7 takes roughly 40 seconds to wake up from sleep mode. How can I diagnose what's taking so long? And what can I do to reduce ...
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6answers
13k views

In Windows 7, why won't my display stay off despite the power settings saying it should?

I'm completely stumped by this. My simple use case is that when I'm in bed, I use a cordless mouse to browse the web, watch videos, etc. - the monitor is across the room. When I'm going to sleep, I ...
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0answers
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Script to put Windows 8 to sleep and wake up in 5 seconds

How can I put Windows 8 to sleep(standby) and then wake up in 5 seconds? I know I can use psshutdown -d to sleep, but then how can it wake up on a timer?
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Why does reducing CPU frequency improve battery life?

Shouldn't we have roughly the same battery life regardless of the frequency since the higher the frequency is, the faster tasks will complete so in the end the CPU, despite running at a higher ...
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1answer
477 views

How to let my laptop automatically hibernate after sleep in Windows 8.1?

I have looked through the advanced power setting but didn't find out a method. What I want is to let my laptop automatically hibernate after certain minutes of sleep. But if the laptop is not ...
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7answers
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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. ...
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2answers
384 views

Is My PSU compatible with this UPS

I have this PSU and this UPS, however due to the PSU being/having an active PFC (power factor correction) it is incompatible with my UPS (at least according to APC tech support, for reference see my ...
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5answers
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Why does my monitor power off despite my power plan telling it not to?

I am developing a web thin-client for an information kiosk running Win7. I make sure the screen saver is turned OFF and the "Turn off display" setting is set to NEVER. After I leave the kiosk for ...
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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 ...
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2answers
304 views

Sleep mode vs. hibernation power usage and safety [closed]

I was wondering roughly the power difference between hibernation and sleep mode? I know hibernation uses almost exactly the same amount of power as when the PC is off, but how about sleep mode? Also, ...
0
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1answer
27 views

Change power plan in Windows after power failure (on notebook)

I have Windows 8.1 and would like to have my notebook automatically change the power plan to a different one when loss of AC is detected. How can I do this? Reason is because I have a pretty power ...
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1answer
69 views

Insert the battery in a notebook connected to electricity?

I use to work on the netbook (Asus X53S) with no battery using the electricity cable. Sometimes it happened that I need to move the notebook and I would like to know if is it possible to insert the ...
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(Windows 8) Change power button to log off

Ways to accomplish this. Perhaps using group policy, registry editor, windows settings, and etc. Since windows 7 configurations differ somewhat from windows 8, the settings that worked for windows 7 ...
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3answers
547 views

Windows 7: sleep turning the computer off vs. leaving the computer running?

I just replaced a busted motherboard on my Windows 7 computer, and it no longer sleeps as it had before. With my old motherboard, whenever I put the computer to sleep, the screen faded to black and ...
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2answers
8k views

How to disable Connected Standby in Windows 8?

I have a tablet that runs Windows 8 Pro. Microsoft came up with a new power mode that they call Connected Standby, in which evidently all non-Metro apps are suspended when the tablet is put in a lower ...
5
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2answers
7k views

No Hybrid Sleep in Windows 8?

As you can see below, there is no hybrid sleep option like there is in Windows 8. Is it enabled by default with sleep or hibernation or is it gone entirely? <- Windows 8 vs Windows 7 -> Edit: ...
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4answers
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Lenovo laptops: Difference between “Lenovo Dynamic Graphics” and “High Performance”

I recently purchased a Lenovo IdeaPad Y580, and I'm trying to figure out the difference between the different power modes: Power Saver, Balanced, High Performance, and Lenovo Dynamic Graphics. The ...
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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 ...
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VESA DPMS not working with xscreensaver

I have a monitor fully VESA DPMS capable. I am using Gentoo stable with XFCE. For xscreensaver: I have the setting "Quick Power-off in Blank Only Mode" enabled. For xscreensaver: I have the setting ...
7
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1answer
11k views

How does windows “limit” the CPU (Power Options / Battery saving)

Can anyone explain how Windows effectively limits the CPU? Last time I tried some tricks to let my laptop not overheat, so I tried limiting the CPU to 70%. As for my suprise it stopped my laptop ...
24
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What's Keeping My Computer Awake?

First the question; How do I figure out what is preventing my Windows 7 computer from going into sleep mode? Second; some background... I've been struggling with this for a few days and am utterly ...