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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Delay sleep/login page when closing laptop lid on Windows 10?

I want to be able to close my laptop lid, but not have the laptop got to sleep for a set amount of time (e.g. 5 minutes). If I open the laptop in that time, it bring be back to where I was without a ...
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19 views

Computer shuts down when trying to wake up after going a sleep for a while

I've got a windows 8.1 computer that goes to sleep and wakes up fine in the space of about 30 mins, but if you try and wake it up after that, it shuts down. I think I've tried ever combination in ...
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24 views

Sleep after and Hibernate after in Power Options

In Power Options, when you change a plan's settings, you have the options to change the Sleep after time and Hibernate after time: I have a couple of questions regarding the different scenarios for ...
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1answer
18 views

How to easily toggle to and from High Performance power mode in Windows 8

Windows 7 and 8 have three default "power modes", regarding how much the prioritise speed vs conserving energy: "Power saver", "Balanced", and "High Performance". On a portable machine with a battery ...
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15 views

Dell Dimension E521 not waking up from sleep or hibernate

I have been having some unusual power management problems on my Dell Dimension E521. When the computer goes to suspend mode automatically, it suspends properly, but when I turn it on, all I get is a ...
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10 views

second Hdd on optical bay and power consuption

I have a new Lenovo W541, and while the first week the fully charged battery was saying 4 hours left", after I added 1T HDD on the optical bay (DVD slot) now it says 2 hours left. I read around that ...
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2answers
64 views

Set brightness to zero in Windows (like in Ubuntu) [duplicate]

I have a dual boot Lenovo W520 system, with Windows 7 and Ubuntu 14.04. In Ubuntu, when I set the brightness to the lowest value, the backlight actually turns off, which is a brilliant battery saver. ...
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35 views

Energy manager conservation mode is not working properly

I have a Lenovo Z510 with its official energy manager installed on it. Most of the times my laptop is plugged in and I've turned on conservation mode in energy manager in order to increase the life of ...
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2answers
54 views

Laptop waking up from sleep because of “power button”? (Windows 8.1)

My computer is brand new but has a serious problem - it wakes up from sleep mode on its own in the middle of the night, usually a couple hours after I put it into sleep mode. This problem is ...
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1answer
70 views

High Sleep Power Consumption in Yosemite

Over the last week, my OS X Yosemite (rMBP 2015) has been consuming large amounts of power in sleep mode (~20% over 12 hours). I am not aware of any particular thing I might have done to make this ...
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1answer
58 views

Windows 8.1 Laptop; Is there a way for closed lid to cause sleep but not when there is a monitor hooked up?

Is it possible to make a laptop sleep when the lid is closed UNLESS there is an external monitor that is plugged in? Perhaps a registry hack or third party software? The control panel power settings ...
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2answers
56 views

How can I stop my laptop from automatic waking up?

My laptop wakes up automatically exactly 12 hours after it was put into a sleep mode. It has this behavior from the beginning, it is very annoying, especially then the lid is closed and it wakes up ...
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42 views

Battery stops charging at 60% after installing Ubuntu

I had Windows 7 installed on my Dell laptop. The battery was working correctly and charging to 100%. When I installed Ubuntu I noticed that battery is charging to 60% only. I thought it was just a ...
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53 views

ASUS Z87-PRO cannot power-on via USB from S5

I have the ASUS Z87-PRO connected to a Seasonic S12 II Bronze power supply. All USB ports are powered while the device is powered-off - S5 (by having the "ErP ready" option in BIOS disabled). I ...
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0answers
31 views

Cannot Wake Laptop From Sleep

I just got a laptop with Windows 8.0 Pro 64 bit. I know this is common problem but I cannot get this solved. When the laptop goes to sleep, it cannot be woken up. I have tried to search google and ...
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50 views

xfce4-power-manager does not Off Fan in Debian 8

I have recently installed Debian 8 for amd64 in my laptop. Laptop is dell vostro. I also install LXDE environment. As manage power I installed xfce4-power-manager (because this recommend for lxde). ...
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1answer
23 views

Automatic power on my server

I have a problem with electricity in my company (common cuts) how can I make my server (DELL POWEREDGE 2900) starts automatically when the electricity is restored and I'm not there
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1answer
56 views

External hard drive spinning down too early

I have a Mac Mini 2007 running Ubuntu Server 14.04 LTS with an external Hitachi Touro Mobile 3.0 attached. APM is 127 (hdparm -B127) with standby value of 1 hour (hdparm -B242). But the disk is ...
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71 views

Power configuration for docked - undocked laptop

I have a problem with my power configuration for my laptop. I have a laptop (Dell E-6530) which I use for work at home and at office. At office I also have a docking station (Dell E-Port Plus II) with ...
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2answers
113 views

Default Power Plan options apart from Balanced have disappeared, how to restore them?

On Windows 8.1 on a Microsoft Surface, normally I have Balanced, Power saver, and maybe High Performance. Today I only have Balanced ... where could the others have gone? When I go to Control ...
2
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1answer
17 views

Xscreensaver causing my monitors to turn off and on repeatedly when its power management features are active; how to fix?

Something weird is up with my Xscreensaver 5.15 configuration on Debian Wheezy. I have two Dell U2412M monitors hooked up to a single graphics card (one over native DVI and one over HDMI output to DVI ...
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2answers
48 views

Will external screens dim as part of power management?

Most, if not all, Windows laptop computers will dim their screens after a configurable time duration. After an additional time duration, the screen will turn off completely. These settings are ...
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30 views

Fixing hibernation on Windows 8

My Windows 8 will not hibernate anymore. I ran sfc /scannow, found some issues, ran DISM /Online /Cleanup-Image /RestoreHealth, and again sfc /scannow, and all is good. I've disabled and enabled ...
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1answer
52 views

Can the power button of a PC or laptop be remapped?

Forget for a second how bad an idea this would be. But is it possible to remap the power button of a PC or laptop to, say, print some message or anything other than managing the power? If not, why? ...
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25 views

Laptop shuts down by closing the lid when plugged, not goes to sleep as it should

I have installed Debian 8.0 Jessie with Gnome on my HP ProBook 430 G2. The weird problem is that when I close the lid while laptop is plugged, it shuts down and does not go to sleep as it does when ...
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77 views

All USB devices randomly stop working under Windows 8.1

As the title says, this problem (USB devices stop working) happens completely randomly – once a day, 5 times a day, or sometimes not at all. I have searched the event viewer after restarting every ...
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125 views

Overriding “The speed of processor 0 in group 0 is being limited by system firmware”

My Thinkpad automatically locks the CPU frequency to ~1,5Ghz while the adapter is plugged in without a battery, as described in this article. I don't care whether the adapter can support it or not ...
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1answer
26 views

How can I change the description of a power plan in Windows 8?

I used the powercfg utility within windows to duplicate a power plan that my Samsung SSD software created and I would like to change the description of the new plan.
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1answer
67 views

PC restarts on power outtage despite having a UPS

Unfortunately where I live I do not have 24/7 electricity. My new PC rig which is considered to be a high-end(gaming) system is connected to a brand new APS/UPS that have these specs: DC-AC ...
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0answers
70 views

USB device loses power after 20 seconds Windows 8.1

Alright so I recently started using a Tritton Primer Headset, it worked fine for a day but since then the USB powered baseplate receives power for around 20 seconds then it drops to 0ma. After 20 ...
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1answer
33 views

How can I make windows reset the power plan to a chosen one after each restart?

After I start my pc every morning I don't want to check what power plan I am using and comfortably start my favorite game without worrying about whether I left a power saving power plan on. It could ...
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1answer
26 views

How to prevent hibernation during work hours

I have a laptop at work that I don't want it to hibernate during work hours. It may be running a program that will corrupt the current data if it hibernates. After work, it can hibernate until someone ...
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2answers
138 views

Can't set Qualcomm Atheros AR9485 card power on laptop under Linux

I've been trying to set the power management on my wireless card. I looked at PowerTOP and I tried setting power management on the wireless card, but it doesn't work. When I tried using the command ...
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1answer
167 views

Display won't turn off, Turns black Instead Lenovo ThinkPad W540

In my power setting, my display should turn off after a minute, when this amount of time elapses, the display is still on but showing black screen instead of turning off. How Can I solve this? ...
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50 views

How do I prevent an Asus Q301LA laptop from shutting down when I am actually selecting sleep?

I purchased an Asus Q301LA laptop about 9 months ago. It ran Windows 8.1 from the beginning, and worked flawlessly. But about a week ago it began having sleep issues. Whenever I try to put it into ...
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29 views

Change Energy and Power Usage Settings On Mate Desktop

I tried to change the energy settings on my Mate desktop but I find the GUI app rather poor and it lacks very important settings, such as: A separate setting for the timeout before entering ...
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0answers
66 views

Delay sleep/login page when closing laptop lid on Windows?

I want to be able to close my laptop lid, but not have the laptop got to sleep for a set amount of time (e.g. 5 minutes). If I open the laptop in that time, it bring be back to where I was without a ...
0
votes
0answers
80 views

My laptop doesn't turn on after properly shutting down

I've been using an HP Pavilion g6-2289x for one and half years. It was working fine so far. One week ago it started behaving quite strangely. When I shut down my laptop after use, and tried to start ...
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1answer
24 views

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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0answers
91 views

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 ...
0
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1answer
167 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
33 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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0answers
30 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 ...
2
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1answer
640 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
63 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
275 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
132 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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329 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
106 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 ...