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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Power Management: Have Win 7 box turn on and off at a scheduled time

I sometimes need to run a batch job on my Win 7 Pro workstation at a fixed time. I use the scheduler to make sure the task runs then. But, I need to disable sleep beforehand, which wastes lots of ...
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1answer
2k views

How to disable Connected Standby in Windows 8?

I have a tablet that runs Windows 8 Pro. Microsoft came up with a new power mode that they call Connected Standby, in which evidently all non-Metro apps are suspended when the tablet is put in a lower ...
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12 views

Can I prevent my Windows laptop from waking up when the lid opens?

My laptop (a Lenovo Thinkpad W530 running Windows 7) regularly wakes from a sleep state in my bag, draining battery and overheating badly (even when I make a point to leave the fans unobstructed by ...
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1answer
32 views

Battery Meter in Windows 8.1 keeps showing “Balanced” a the top

I often use High Performance and Power Saver, but the "Balanced" power plan keeps staying at the top and I can't rearrange. How I can change what plans should be shown so I don't have to go to Power ...
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1answer
32 views

Is it possible for a device to remember settings after turning the pc off?

I once had a problem with a sound card in my computer. After installing drivers under windows and setting the card, I had to mute it. Then I turned my pc off and loaded a linux OS from another disk. ...
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5answers
243 views

Prevent Windows 7 from enabling power saving on USB 3.0 hub

I have installed a USB 3.0 hub on my desktop computer. I use it to connect an external USB 3.0 disk for backup purposes, and I have a problem: Windows 7 enables by default power saving for said hub, ...
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1answer
2k 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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2answers
4k views

Diagnose slow wake up from sleep

My new work computer (Dell Precision T3600, 16GB RAM, SSD) running Windows 7 takes roughly 40 seconds to wake up from sleep mode. How can I diagnose what's taking so long? And what can I do to reduce ...
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3answers
2k views

Processor Maximum and Minimum state missing from Power Options

Restarted my laptop after all-night torrenting, and when the exhaust fan felt unusually warm, I notice the setting is gone, my CPU is running on max-speed no matter what profile I choose (even ...
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8answers
20k views

Is there a way to close the lid on a MacBook without putting it sleep?

Is there a way to close the lid on a MacBook without putting it sleep? This would be useful when connecting the macbook to an external display, for instance. I've never been able to figure it out ...
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1answer
2k 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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1answer
3k views

What could be causing windows to fail to sleep or hibernate, and revert system settings?

I am running Windows 8.1 on my system (Dell e6520) and the symptoms are this: My PC won't sleep or hibernate. It the screen turns off, but the fans just run and run, and after a little while, it ...
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0answers
14 views

How can I make my Android phone request (negotiate for) more charge from (with) the host PC? [migrated]

Hello there is a wonderful Q&A here about detecting how much charge your phone is drawing from the computer host: How do you check how much power a USB port can deliver? In my particular case, my ...
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4answers
3k views

How can I prevent my wireless mouse from waking my Windows 7 computer?

My mouse is so sensitive that it randomly wakes my computer up even when I don't touch the mouse. I don't want this to happen, so I want to disable the mouse's ability to wake the computer. I know ...
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0answers
25 views

Terminate/Kill a process before entering Standby

We have a MSAccess based solution that is running on customers computers and is lauchend through a VBScript-script. Due to the network enviroment here, we KNOW that in most of the cases the ...
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1answer
68 views

What is preventing my computer from going idle?

When I first boot my Windows 7 computer, it will go idle if I stop using it - first the screensaver comes on, then the computer goes to sleep after a certain amount of time. This is the expected ...
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0answers
19 views

Loss of memory when system is mistakingly inactive

I have an application (FEM-Simulation) which runs about 24 hours and takes about 60%-70% of my memory. When I keep working or surfing during the simulation, it runs without any problems. But when I ...
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2answers
6k views

What Is AVR Mode In UPS Software Management?

When UPS was disconnected from power source and 25W desk lamp was connected to it, all was normal: But as soon as i have unplugged it and plugged in 95W fan, AVR "Normal" changed to up arrow: ...
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2answers
12k views

How many watts do case fans generally use?

I'm deciding between a 500 watt PSU and a 600 watt PSU. I currently have a 460 watt PSU that powers everything but my dvd drive, spare hard drive, and 2 fans. I've determined 40 watts is enough to ...
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1answer
678 views

Laptop Power saving when in standby

After my laptop goes into standby is there any way to put it into hibernate when the battery reaches a critical level?
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4answers
616 views

How do I set my power plan to turn off the display in less than 1 minute?

The lowest setting in a Windows power plan under "Turn off the display" is "one minute". How do I set it for 30 seconds, 15 seconds, et cetera? I found that the shortest idle duration time you can ...
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0answers
20 views

Windows Vista computer won't power on when connected to router

In all of my years of supporting PCs, I have never seen this. Here's hoping y'all have an idea. My client has a home PC running Windows Vista (long story as to why he hasn't upgraded). He has a ...
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1answer
145 views

Force a program to consume at most x% of CPU time [duplicate]

Is there a way to force a specific program to use less than 100% processor time even when the CPU would be idle otherwise? Using process priority, we can adjust how much resources a given program ...
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3answers
1k views

how to make LXDE hibernate the computer when the power button is being pressed

How to setup LXDE (a linux desktop environment) to hibernate a PC after the power button on the computer is pressed?
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1answer
54 views

which parts i can remove from server to reduce power coonsumption

I have a 4u IBM server for home use and it consumes 480w. It has 4 X Quadcore CPU and 128GB RAM & CD Drive I want to reduce the power consumption so i want to know that if i remove 2 x Xeon ...
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8 views

Idle state in RTOS, sleep state or lowest frequency?

In real time systems using an RTOS, what how would the RTOS handle an idle period? Would it run nop instructions at the lowest frequency supported by a Dynamic Voltage Scaling capable processor? or ...
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68 views

Windows CPU max/min %age settings not being adhered to

Interesting. I have a Windows 8.1 laptop with and an Intel Core(TM) i7-3630QM CPU @ 2.40GHz with 4 cores and 8 virtual processors. I have various power profiles in Windows: 1. Power Saver, 2. ...
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2answers
1k views

Underclocking Haswell for power saving

I have been reading up on Intel's new Haswell processors, and it seems that the K-series is designed for overclocking. But what if I want to underclock? Do I still need to buy a K-series processor? ...
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4answers
810 views

CPU is underclocked on battery (balanced plan)

I have a pretty bad amd e300 cpu. Whenever I am on battery and on balanced plan, cpu-z reports my frequency to be 798 mhz (in all conditions (full load etc)). However, in the processor power ...
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0answers
37 views

Turn on computer with wireless keyboard

I have a PC connected to my TV that I like to use from the sofa. I have a wireless keyboard (Logitech K400, this one) for the purpose. I would like to be able to turn the PC on (as opposite to just ...
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2answers
1k 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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2answers
316 views

How can I get my Windows 8 PC monitor to power off like a phone?

Here is what I would like to happen (and what I mean by "like a phone"): I use my PC I stop input to the PC (therefore "idle") Some time passes (say 3 minutes) There is an indicator that the monitor ...
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1answer
474 views

How can I set the idle timer for a disk connected to a 3ware RAID controller?

I have Linux server with a 3ware 9550SX SATA RAID controller with several disks attached. One of them is a 2TB disk that I'm using for backups. It's a normal desktop disk (i.e. not for 24/7) and I ...
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1answer
573 views

utility to troubleshoot PC not going idle

I have Windows 7 x64 installed and sometimes it will not go into an idle state allowing for the monitor to turn off. I keep shutting down services and programs, but I can't pinpoint what is causing ...
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0answers
8 views

How to perform certain tasks when switching from/to Power Saver mode in Windows 8? (Disable services etc)

How can I disable certain services and terminate certain programs automaticly when I let my laptop go into power saver? And then automaticly restore them when I go to "performance" mode again? If ...
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2k views

Powering down the display in XP with a command

Is there a command to power down the display in Windows XP? That is, a command that causes the video card to stop sending a signal to the monitor until input is received, much as power management does ...
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4answers
110 views

Is it possible to change computer's power plan via Remote Desktop Connection?

I want to change my laptop's power plan via Remote Desktop Connection, but the option is greyed. I am logged with the admin account and both PC's are running Windows 7. What could be the problem?
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votes
4answers
11k views

WiFi or Bluetooth controllable power outlet

I am looking for some sort of thing that I could plug a lamp into that would then plugin into the wall that would allow me to control it (ie turn it on and off) via a web interface, or via a web API ...
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23 views

Sleep, hibernate additional condition in Windows

Is there a way to set an condition to not sleep/hibernate on Windows based systems if the particular app/process is running?
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2answers
36 views

What's this number under “power capabilities” in “power data” for a device?

I would like to understand what the number 00000009 means in the picture. I mean, I understand that the things under it can say all kind of thins about power capabilities, and I've even been able to ...
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1answer
153 views

Set password for certain events on Windows 7

Is it possible to configure Windows to ask me for the password after specific events? Like, only prompting for my password after Hibernation or Shut Down, but never after Restart or Suspend?
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1answer
149 views

Downgrading gaming pc to NAS box

I currently have an old gaming pc which I wish to turn into a NAS box. Im aware and understand the way to install, im more interested in reducing power consumption. I thought if i removed the ...
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3answers
68 views

Windows 7 screen saver

We have a range of public Windows 7 computers. The computers are always on. When the users are logged on, the screen must not go off and the computer must not sleep. However, when the user ...
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2answers
127 views

Query current power config settings on Windows 7

Powercfg gives the ability to set certain settings like monitor-timeout-ac and standby-timeout-dc using powercfg -change <setting> <value>. Is it possible to query the current values of ...
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2answers
155 views

On windows, how to force application close upon going to sleep

Is there a scripting possibility or application, free or commercially avaible, that would allow me to set up windows to close a partuicular application before it goes to sleep mode?
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50 views

Avoiding sleep when lid is close and no one is logged in

I've an old Dell Latitude laptop that I've converted to CentOS 6.5. As this is going to work like a server (i.e. no one will use it directly) I've changed from UI the power management option to ignore ...
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1answer
35 views

After a while the computer enters hybernate, how to disable?

If I manually set the computer to sleep or just leave it alone, by the morning it appears to be switched off, in hybernate mode. This is very annoying because the computer is notebook and I have to ...
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3k views

Can a faulty battery cause my laptop to shutdown even on AC line? (battery installed AND plugged in together)

until recently I experience something rather annoying (and troublesome) with my laptop: it spontaneously shuts down itself without any warning, and restart right after that. No blue screen, no hanging ...
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25 views

minimum allowable CPU speed

How can I determine the minimum allowable speed for my CPU to run the computer. Having the option to reduce the CPU to 0 is not logic nor allowable in Win8. Even if you set the Max. processor ...
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0answers
13 views

Display issue after enabling Super Energy Saver?

This is going to sound incredibly stupid to computer buffs, I'm sure. But: My battery was dying. I enabled Super Energy Saver in the Power Options. The screen went black, and then the resolution ...