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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Ubuntu 13.10 has no Suspend or Hibernate Options

I have a Lenova Yoga 2 Pro, and I have Ubuntu 13.10 installed. I am having some issues setting the power functions. At the moment I can not suspend or hibernate the laptop. So from Gnome 3.10 I have ...
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5answers
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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
11k 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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23 views

My laptop often resumes when its lid is *closed*

I have an Alienware M17x with Kubuntu 14.10. When I suspend to RAM and close the lid, very often it will wake up after a few seconds of sleep. Sometimes not. I get the feeling it's related to how ...
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1answer
39 views

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

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
37 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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22 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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1answer
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 ...
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699 views

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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1answer
45 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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8 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
535 views

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
7k 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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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 ...
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6answers
11k 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
60 views

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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1answer
3k views

Enable Lenovo's “conservation mode” on boot

I have a Lenovo Z50 laptop with Lenovo's Energy Manager installed. Inside the manager's settings menu is an option to enable "conservation mode", which keeps the battery charged in the 40-65% range ...
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3answers
65 views

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
134 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
341 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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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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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, ...
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1answer
59 views

Screen brightness maxes out automatically when watching videos or playing games

The screen brightness maxes out automatically each time I am wath videos or playing games on my laptop (a Packard Bell EasyNote TSX66HR). What i have done recently: I bought new Samsung Evo SSD ...
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1answer
20 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
64 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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3answers
12k views

Docking station power adapter is not recognized by my Dell notebook

At this morning, my laptop (Dell Latitude e6410) gave me this error. I didn't do anything, I didn't change anything. And I got this docking station just 2 month ago. I made a little research on the ...
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36 views

(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
528 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
5k 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 ...
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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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What is the “known hardware incompatibility” that disables PCIe Active State Power Management? How do I fix it?

I'm on Windows 7. I just ran a Power Efficiency Diagnostics Report through powercfg -energy and I got this error: Platform Power Management Capabilities:PCI Express Active-State Power Management ...
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6answers
12k views

How to disable power to USB ports when laptop is in sleep mode

I have a Windows7 laptop with two external 2.5" HDDs and a cooling pad connected through USB ports. When I put the laptop to sleep, these devices are still powered on - the fan in the cooling pad is ...
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4answers
4k views

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 ...
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1answer
659 views

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
9k 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 ...
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1answer
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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 ...
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3answers
1k views

Unloading modules in Ubuntu for saving power

Is there any way to unload modules in Ubuntu (e.g., keyboard, USB, graphics etc) to save power? I don't want to use powertop for that, but I want to manually find these modules and unload them.
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4answers
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Secondary monitor shuts off when laptop lid close

I have a new dell XPS laptop. My external Dell monitor attached to my laptop.Everything works fine if my laptop lid is open, but if I close the laptop lid, I lose the display on the monitor attached ...
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30 views

USB mouse and flash drive work but Webcam and Camera dont

im having some issues with my USB ports. mouse and flash drive work but Webcam and Camera have some problems. my webcam freezes after a few seconds and in ManyCam it says please close other programs ...
166
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7answers
71k views

Should laptops remain plugged in when their battery is 100% charged?

When your laptop's battery is 100% charged, should you leave it plugged in so any battery power doesn't get used, or will that cause overcharging, overheating, etc.? Should the laptop be unplugged ...
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4answers
12k views

WiFi or Bluetooth controllable power outlet

I am looking for some sort of thing that I could plug a lamp into that would then plugin into the wall that would allow me to control it (ie turn it on and off) via a web interface, or via a web API ...
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1answer
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Why do desktop OSes have a high response time when resumed from sleep/hibernation mode?

Why do desktop OSes such as Windows have a high response time when resumed from sleep or hibernation mode? Intuitively, it should take less time to respond. But what is messed up internally that ...
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1answer
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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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5answers
3k views

How can I prevent my wireless mouse from waking my Windows 7 computer?

My mouse is so sensitive that it randomly wakes my computer up even when I don't touch the mouse. I don't want this to happen, so I want to disable the mouse's ability to wake the computer. I know ...
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3answers
5k views

Power LED always stays on after shutting down the laptop

I am using a Dell n5050 laptop, recently I noticed that I have a problem with my laptop. Namely, the power LED always stays on after shutting down the laptop. I've found two options: long press of ...
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1answer
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Asus laptop not retaining Aero theme when unplugged

The problem i'm having occurs when i unplug my laptop, it disregards several elements of my theme. The taskbar gains "auto-hide". My desktop background is turned white. The transparency on my ...