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

0
votes
0answers
66 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 ...
0
votes
0answers
26 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 ...
2
votes
2answers
724 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. ...
6
votes
4answers
1k 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 ...
3
votes
1answer
196 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 ...
0
votes
1answer
224 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 ...
1
vote
2answers
168 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 ...
0
votes
0answers
354 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 ...
1
vote
0answers
82 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 ...
0
votes
0answers
107 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). ...
0
votes
1answer
262 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
2
votes
1answer
216 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 ...
0
votes
0answers
367 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 ...
0
votes
2answers
952 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 Panel\...
2
votes
1answer
145 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 ...
1
vote
2answers
121 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 ...
1
vote
1answer
236 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? ...
1
vote
0answers
53 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 ...
1
vote
0answers
417 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 (...
2
votes
1answer
62 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.
0
votes
3answers
247 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 ...
1
vote
0answers
113 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 ...
0
votes
2answers
100 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 ...
0
votes
1answer
46 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 ...
0
votes
2answers
530 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 ...
0
votes
1answer
836 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? Details:...
1
vote
0answers
103 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 ...
0
votes
0answers
248 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
143 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 ...
0
votes
1answer
30 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 ...
1
vote
0answers
262 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
votes
1answer
402 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. ...
1
vote
1answer
43 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 ...
3
votes
2answers
2k 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 ...
1
vote
1answer
93 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 ...
1
vote
1answer
1k 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 won'...
2
votes
1answer
43 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 ...
0
votes
1answer
421 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 ...
0
votes
1answer
284 views

USB 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 ...
0
votes
1answer
99 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 ...
1
vote
1answer
627 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 ...
4
votes
1answer
223 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 ...
1
vote
3answers
20k 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 ...
-1
votes
1answer
103 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 ...
0
votes
0answers
434 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 ...
1
vote
0answers
136 views

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: ...
-2
votes
1answer
27 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 ...
0
votes
2answers
3k 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. ...
0
votes
1answer
258 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 (...
5
votes
0answers
389 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 ...