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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Having a rough estimate of energy consumption of the computer.

I'm developing an app which needs to know about the energy consumption on computers (On windows). I realized the OS has no functionalities to support this directly, so my workaround is collecting info ...
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0answers
11 views

How do I use high performance power plan when it doesn't show on the menu?

I've had this problem with memory management after I installed windows 10 again. Last time I fixed it with changing to high performance power plan. So I tried that and turns out that it doesn't exit. ...
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12 views

Second Monitor goes to Sleep - Won't wake up

My second monitor goes to "sleep" at random intervals and never wakes up. I have to push the physical off button of the monitor, on, and then i can see stuff again for a few minutes. powersave ...
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0answers
7 views

Changing Resolution When Power is Disconnected

I recently purchased a laptop with a 4k display which is very nice, but also very power hungry. I was looking into a way to reduce the display resolution when the laptop is unplugged thus forcing the ...
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0answers
17 views

A way to shutdown after idling for some time

I see there is setting for configuring to put computer to sleep However, I would like to shutdown it instead of sleep, where I can configure it?
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7 views

Power Management Stopped Working - WindowsXP

For the past year, I've had my desktop (Intel Core-2 Duo w/ASUTEK Motherboard) set with Power Management (right-click on screen - Properties - Screen Saver) to power off the display after 15 minutes ...
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2answers
41 views

windows 10 desktop - does sleep mode use a lot of energy?

I recently bought a desktop PC - it's the first I've bought for possibly 10 years and it's got Windows 10 installed. I notice that these days, there is no option to Hibernate anymore, just shutdown ...
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1answer
64 views

How to explain the strange power consumption difference among OSes and hardwares and how to lower it?

I use a wattmeter to measure the power-consumptions of my computers. The following is the result: my laptop + Ubuntu 14.04: 14.5 watt my laptop + ArchLinux: 30 ...
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1answer
66 views

How does my PC know what to boot on restart?

It is clear that there is some boot sector on my PC which contains the loader with menu, which allows me to choose the OS to load. But, I have noticed that PC does not display me this menu after ...
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2answers
21 views

Windows 7 Power Button Turn off Display

In the define power Buttons and turn on password protection page in the Windows 7 Control panel, the user has the option to have the power button do the following: Nothing Sleep Hibernate Shutdown ...
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1answer
22 views

Constructing a laptop with “high speed” mode vs. “low power” mode

While looking for a new laptop, I found out that the CPUs in laptops are usually less powerful (in terms of speed) than in desktops. As an illustration, in one store I was offered a choice between a ...
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1answer
3k views

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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0answers
425 views

Computer does not turn off, stuck in weird hibernation

Ok, So this problem is starting to occur in a lot more computers than one in our network. We have several Dell V131 that when going into sleep mode seems to Shut down all USB-ports Internal Keyboard ...
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2answers
299 views

Laptop wakes up from sleep every several hours

I have a new ASUS Zenbook UX305. OS: Windows 10 Home I've figured out that my laptop wakes up from sleep during the night, so i reviewed the event viewer and found out that it happens about 3-4 times ...
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1answer
21 views

How to programmatically monitor power consumption on Windows?

I'm developing an app to monitor energy consumption of users' computer (for example how much energy it consumes on normal mode and energy save mode, battery status, etc) and I was wondering if there ...
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2answers
746 views

Screen no longer turns off in Windows 7

I don't know why, but I noticed that my LCD screen no longer turns off after the time set in the Windows Power Options panel. I have tried to turn off the screen with Wizmo and that works fine. The ...
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1answer
23 views

Why my laptop goes to sleep mode automatically even if all the power settings are fine?

I have a strange problem in my laptop that why it goes to sleep automatically even if all power settings are fine? I am using Windows 10 Home 64-bit by the way. Kindly share your thoughts!
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4answers
1k views

Vista monitor power save mode also turns off network

On a Dell E6500 set to the "Balanced" power scheme, when Vista puts the monitor to sleep the internal network card also goes to sleep. Setting Vista to not turn off the monitor also keeps the network ...
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2answers
4k 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 ...
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3answers
24k 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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1answer
3k views

really disable power save in linux wifi

I've got a laptop with an Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34) (using iwlwifi kernel module). Although power_save (a module parameter) is disabled, I can see 802.11 ...
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1answer
19 views

Equivalent of pmset noidle -u on Windows

On OS X one can easily temporarily prevent the Mac from sleeping using the command: pmset noidle -u pmset - manipulates power managment settings noidle - flag stands for sleep prevention method u -...
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1answer
45 views

Laptop - Screen sometimes stays black after “display off”

My laptop is currently set to never go to sleep (on either battery or plugged in) but I do have it power off the display after 10 minutes(battery) or 20 minutes(plugged in) Most of the time, it works ...
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6 views

Audit Power Settings change

I helped with a machine that was stopping whilst running many samples in automatic mode. We found that it was because the machine was going to sleep during production. The settings should be never for ...
10
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4answers
6k views

Execute a command if Linux is idle for 5 minutes

I would like to execute a command such as notify-send 'a' if my Linux machine has been idle for 5 minutes. By idle, I mean the same thing a screen saver that gets activated would use to define "...
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3answers
8k 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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0answers
17 views

Computer doesn't remain in power-off state

I can't hibernate my computer. After finishing hibernate and powering off, it powers on again and boot. All options in BIOS known to me are disabled: Motherboard is Gigabyte GA-B85M-D3H How to ...
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0answers
20 views

Prevent suspend when load average is high

I often run into the situation, that I start a long-running process, then leave the PC for a while and come back to a suspended system. So I though that there must be a better, more intelligent way of ...
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3answers
2k views

HP Envy screen brightness gets stuck

Once in a while, the screen brightness stops responding to any reason, and stays on full brightness. For those of you that have HP Envy, you know what this means: battery suicide. The FN+* controls ...
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1answer
34 views

how to set an external hard drive to power down - WIN7

Wondering how I might set an external hard drive to power down after a certain period of inactivity on Windows7. I have read a short tutorial HERE, but it seems this option is for ALL hard drives.
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0answers
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How do I specify advanced power settings for all users using group policy?

I need to set up a Microsoft Surface Pro tablet so that it never throttles the CPU. One solution I found using this guide is to set both minimum and maximum processor state to 100% in both battery and ...
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2answers
2k views

Want to throttle CPU on Windows 7 desktop, but it is ignoring Max CPU setting in Power Options

I want to be able to substantially throttle down the CPU on my desktop, which due to space constraints is in our bedroom and the wife is suspending it each night because of the fan noise. I've tried ...
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0answers
29 views

Atom x86 Tablet, Can't access camera when screen is off and ConnectedStandby off

(Also posted the question here : https://social.technet.microsoft.com/Forums/en-US/1c988f9c-39c2-42ec-968b-572d23deaea0/atom-tablet-cant-access-camera-when-screen-is-off-and-connectedstandby-off?forum=...
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4answers
10k views

Lenovo tools for windows 7: can't re-enable wireless

Consider a netbook - Lenovo S10e with Windows 7 and the S10 Lenovo power management tools. Machine has factory BIOS. Fn+F5 is the key combo to toggle the wireless radio on/off. The tool allows the ...
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0answers
20 views

Brother ADS-2000 disconnects overnight

We have a Brother ADS-2000 scanner that disconnects every night. The sleep settings on the machine are set to the max timeout, and USB power management is disabled, so Windows shouldn't shut off the ...
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0answers
2k views

USB Suspend: USB Device not Entering Selective Suspend

After running the powercfg /ENERGY command, I get the following Efficiency Diagnostics Report with 6 errors: USB Suspend:USB Device not Entering Selective Suspend This device did not enter ...
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1answer
19 views

Prevent external hardrive damage from blue screens or power cuts

I've recently been thinking about getting an external hard drive in order to backup all the stuff that I have, as well as having extra room for some more. Naturally security is an important concern ...
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1answer
1k views

Disable laptop screen when lid is closed

I'm on a Lenovo Y50, running Windows 10. I have an external monitor attached (HDMI) and I use the laptop screen as well as the external. Sometimes I want to close the laptop lid and just use the one ...
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21 views

Custom Windows Power Plan Issue

When you create a custom power plan in Windows 10 using one of the existing power plans (High Performance, Balanced, Power Saver) as a template, are those power plan "templates" simply a grouping of ...
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3answers
4k views

Windows 7 does not turn off monitor displays

I upgraded my long-standing Windows Vista desktop to Windows 7 over the last weekend, and now I notice my three monitors do not turn off after the stipulated 15 minutes as specified in the Power ...
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0answers
15 views

Screen brightness in Power Plan setting keeps resetting

I have an HP Probook 650 with Windows 7 Professional. In the Power Plans, the default is CentraStage which works well for my needs except the screen brightness setting, which doesn't seem to "stick" ...
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1answer
27 views

Problems suspending notebook

I have problems suspending and shutting down Lenovo G560. Suspend problem: after suspending neither power indicator, nor power button begin to blink. Capslock and Numlock leds don't turn off after I ...
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2answers
671 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 ...
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2answers
53 views

How can I disable power saving for all devices in Device Manager?

If Windows (I am running Win 8.1) is installed on a laptop, the Device Manager will include Power Management properties, including an option to allow the computer to turn off this device to save power....
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0answers
22 views

How to find out which softwares are preventing my Windows to sleep?

I have a different workflow when working with my PC. I only shutdown my PC one time a day. Rest of the time I'm away from my PC, it's either locked or I turn off the monitor to comsume less power. I ...
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0answers
104 views

Disadvantages of enabling ErP in BIOS?

While searching for a solution to an external hard drive's LED continuing to blink after shutting down the system, I came across the 'ErP Enabled' setting in my BIOS. I've set ErP to "Enabled (S4+S5)"...
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1answer
488 views

Surface Pro 4 doesn't have Processor Power Management options

I just got a Surface Pro 4, and did all the latest updates (firmware updates and 1511). I went into Power Options, created a "Power Saver" power plan, then went into advanced power options to adjust ...
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6answers
10k views

windows 8 screen shutting off too soon

I went to the power options and changed the settings to make it wait ten minutes before shutting off the screen, but the screen still shuts off after a minute, I've tried setting different time ...
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0answers
244 views

Dell C840 hangs on resume from standby

I have an older laptop - Dell Latitude C840 - with Windows XP Pro SP3. Everything works fine except for standby. It will go into standby but has great difficulty getting back out. On resume, sometimes ...
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0answers
37 views

Computer's power consumption got really high after upgrading to Windows 10

I have an HP Envy dv7 laptop (750GB HDD, 8GB RAM, 1600x900 Display). I used to work on Windows 8.1 and the battery used to serve me for 3-4 hours even when using programs that need a lot of processing ...