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

1
vote
1answer
16 views

Power consumption of different computers

I have an old computer dedicated solely to running a lightweight web server running on Ubuntu. This is actually quite a powerful computer but I do most of my work off a newer computer. Recently, ...
3
votes
1answer
49 views

Why won't PC laptop completely power off after upgrade to Windows 10?

I have recently upgraded from Windows 8.1 to Windows 10 and it appears that it mostly successful. By and large I'm pretty happy with the upgrade however there is now a problem with turning off my ...
0
votes
2answers
76 views
+50

Laptop shuts down instead of going into sleep mode when I send it to sleep

I'm using an Asus laptop. It's more than a year old. This has been going on for maybe a month. I've looked into all the basic settings but can't find what's causing the problem. Here are the settings: ...
0
votes
1answer
35 views

Laptop won't work if it is cold or uses too much power

I have a problem that my computer won't even boot if it's not hot enough or if my graphics card is not underclocked. I decided to check inside for visible broken components, clean dust, replace ...
0
votes
0answers
27 views

Windows laptop waking on touchpad click

I have a laptop that keeps waking from sleep. My cat sits on the laptop when it is closed and the screen bends which clicks the touchpad button. I can't turn off the wake setting on my touchpad in ...
3
votes
0answers
86 views

Screen Saver Won't Activate

I am using a Intel computer stick plugged directly into the HDMI on the TV. Running Windows 10. I'm unable to setup my computer to "auto-lock". In the power settings, I set it to turn the display off ...
0
votes
1answer
39 views

Power mode change randomly on Windows 10

My question : Sometimes, randomly, whether i'm on battery or not , the power mode always switch to performance mode even if i'm on saving battery mode. Plus, on this moment, the start menu pops out, ...
0
votes
0answers
15 views

Stop Monitor Wake-Up Events Using KDE Plasma 5

I'm using Arch Linux with KDE Plasma 5 desktop environment. Unfortunately, I've been having this odd issue with my monitors waking up after going into screen energy saving. I haven't figured out all ...
0
votes
4answers
235 views

Easy way to switch power plan in Windows 10

I've a 27" external monitor connected to my laptop and I use my laptop's screen as secondary. I've both screens turned on while I'm working. When I'm watching movies, I just keep my external monitor ...
1
vote
0answers
195 views

Why is TeamViewer setting up a wake timer in the middle of the night and how to disable it?

After upgrading to Windows 10, my PC started waking up at the middle of the night. I have run all the routine checks and made sure that no hardware has the option enabled. However, upon running ...
0
votes
0answers
53 views

What causes “The speed of processor 0 in group 0 is being limited by system firmware” in the event log?

My Windows 10 event log continually states. In fact, I think my system is slowing down due to this fact. The speed of processor 0 in group 0 is being limited by system firmware. The processor ...
-1
votes
0answers
32 views

Reducing idle power usage of DDR3 SDRAM

I'd like to reduce the idle power consumption of my computer, with the goal of keeping it always on without a large impact on my energy bill (energy is quite expensive over here.) Using HWMonitor I ...
0
votes
0answers
121 views

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 ...
0
votes
0answers
35 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 ...
0
votes
0answers
43 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 ...
0
votes
1answer
21 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 ...
0
votes
0answers
26 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
18 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
101 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. ...
0
votes
0answers
53 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 ...
2
votes
2answers
85 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
83 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
68 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
69 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
74 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 ...
0
votes
0answers
65 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 ...
1
vote
0answers
41 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
54 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
29 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
65 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
111 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
155 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
votes
1answer
26 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
53 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 ...
0
votes
0answers
31 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 ...
1
vote
1answer
58 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
32 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 ...
0
votes
0answers
91 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 ...
1
vote
0answers
160 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
27 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
1answer
71 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
82 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
1answer
37 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
27 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
190 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
208 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? ...
0
votes
0answers
59 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
34 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 ...
0
votes
0answers
86 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
100 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 ...