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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Is it possile to set time before windows disable device for energy saving purposes?

I have a tablet-pc with Windows 8 and dock keyboard. Windows disables dock keyboard after ~10 seconds of downtime by default. I want to increase that time to 60 seconds at least. Is it possible ...
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Computer crashing when I play games

Specs: Intel Core i7-3930k Corsair H70 CPU Water Cooler 16Gb DDR3 G.Skill 4x4Gb 1600Mh 120Gb Intel 520 Series SSD 2Tb WD Caviar Green WD20EARX SATA 6Gb/s 64mb Cache SATA3 AMD Radeon R9 ...
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195 views

Linux Mint: Power Management does not turn off displayport monitor

I have two monitors connected to this system... one via displayport and one via DVI. When I go into the screen saver settings, I enabled Power Management and set standby, suspend, and off to 1 minute. ...
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1answer
35 views

How to wake a linux server when the temperature drops to certain value?

I've been tasked with a weird problem, sending a server into sleep mode when a certain core temperature is reached, and then waking it when it cools back down to a different temperature. I can handle ...
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32 views

Ethernet (but not web) controlled power switch [closed]

It's common to find a "remote power switch" or "web power switch", example http://www.ambery.com/pr2reposwweb.html , which is controlled by a web interface. We need to control a power switch ...
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1answer
791 views

Transcend MTS400 SSD crashes my Acer C720 Chromebook, how to disable SATA power management in Chrome OS?

So I upgraded my Acer C720P Chromebook with a larger Transcend MTS400 SSD. However this SSD has a firmware bug, because of which it is incompatible with SATA power management (ALPM). This Transcend ...
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1answer
66 views

Reduce power usage while computer is “off” [closed]

Recently I bought a device to measure the wattage from devices. To test the apparatus I measured 6 watts from an IKEA LED light bulb which was supposed to produce 6 watt usage and a few laptop ...
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1answer
355 views

HDMI and power saving mode

As documented in this question, I recently bought a new Samsung monitor and connected it to my computer using a HDMI connection; this monitor just doesn't seem to support any power saving mode: it ...
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1answer
37 views

How to make server power settings apply even when computer is activated by WOL

I have a computer with 9 hdds as a storage server in the next room for me and my family (movies and such) connected to the router. The computer is without keyboard and monitor, all works fine, but in ...
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1answer
158 views

Samsung monitor not going into power saving mode

I have recently bought a Samsung LT24D390 TV monitor, which I connected to my computer using a HDMI cable; the video card is a GeForce GTX 560 Ti, the O.S. is Windows 7 x64. The monitor works as ...
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349 views

How to fix Ubuntu 14.04 suspension - abruptly suspends and after manual suspension unsuspends

I had a problem when I closed my lid the desktop did not suspend so I read this post however this did not help so what I did is to rollback now my files looks as attached below. However now I have two ...
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1answer
124 views

UBS devices not waking PC from sleep on windows 8.1

I have a new build based on MSI H97M-g43 motherboard. None of USB devices are able to wake the PC back from S3 sleep. Two methods that do wake up the PC are the power button and wake timers. The usb ...
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1answer
41 views

Boot computer on bringing it to power

I'm trying to reach following: I have a multi master/slave power point. My computer is plugged in into the master slot. The whole multi power point is plugged in into a radio power point I can ...
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1answer
265 views

Keep dual-monitor settings in Windows 8.1 after closing laptop lid

I've got a Dell XPS 15 laptop connected to a (rather old) Dell 2408WFP monitor via HDMI. I want to use only the monitor when I'm at my desk, so I've set Windows to show the desktop there and switch ...
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1answer
130 views

Windows 8.1: How to tell power management to ONLY TURN SCREEN OFF when closing the lid?

I was expecting to find another option in my laptops power management when I close the lid, but all I found is those 3 options: Do nothing Sleep Shut down In an old ThinkPad running Windows 2000 ...
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1answer
3k views

My laptop will not sleep when I close the lid

I've tried to look into everything I know of but this has stymied me. I have a Lenovo Thinkpad Edge 15" currently running Windows 7. The laptop will not enter sleep mode when I close the lid. When I ...
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1answer
80 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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37 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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211 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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Harddrive spinning down though time increased with hdparm

I have an external harddrive connected via USB. The usual method to set the spindown / standby time of harddrives seems to be using hdparm. So I run sudo hdparm -S 200 /dev/sdb and get /dev/sdb: ...
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17 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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66 views

Wake on LAN cause computer wake up immediately after shutting down

I've installed Ubuntu on my Dell PC, and i want to use Wake on LAN. But here i encounter a weird problem. The computer will wake up immediately after shutting down. Here is what i've done: The ...
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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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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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1k 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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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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1answer
110 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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173 views

How can I stop my laptop waking from suspend as the 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
242 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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1answer
282 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
261 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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505 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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44 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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0answers
99 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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3answers
749 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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2answers
769 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, ...
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1answer
741 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
33 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
72 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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50 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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1answer
1k views

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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22 views

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
1k 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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0answers
67 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 ...
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2answers
540 views

How to find out what's causing a laptop to take too long to go to sleep?

Until recently my laptop took at most around 5 seconds to go to sleep when the lid is closed. This was the case for several months. Recently however, my laptop takes around 2 minutes (maybe more) to ...
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1answer
466 views

Low performance when charger is plugged in

I got this laptop: Dell Inspiron N5010 with i5 2,40GHz processor, 8GB Memory and a Kingston SSD. 4 months ago my charger`s pin jack has broken, but it was still working. I noticed that the ...
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2answers
853 views

Computer hibernates when I tell it to sleep

Problem When I tell my computer to sleep, it hibernates instead of sleeping. This occurs regardless of whether I tell it to sleep using the button on my keyboard or using the UI. Interestingly, when ...
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2answers
9k 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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0answers
57 views

How to turn off a particular hard disk in a multiple disk computer system to save power? [duplicate]

Explanation: I have about 5 hard disks in my windows 7/8 machine. Since, the operating system is only installed in 1 disk, the rest 4 drives just consume power staying connected to the motherboard. ...
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1answer
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What are the impact on underpowering my motherboard/graphic card?

I recently had to change my PSU and the one that was given to me has not enough power cables to fully plug every plug in the motherboard and the graphic card. It seems to work just fine though, and ...