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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How to find out what's causing a laptop to take too long to go to sleep?

Until recently my laptop took at most around 5 seconds to go to sleep when the lid is closed. This was the case for several months. Recently however, my laptop takes around 2 minutes (maybe more) to ...
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4answers
3k views

Keeping Mac OSX up and sleepless while task / app is running

I want to leave rsync working over wifi for hours turned on AC power. But when I do so the Mac breaks the connection after some time. On Energy Settings pane it's configured to "Computer Never ...
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7answers
5k views

Razer Mouse stays lit up when PC is turned off

I have a Razer gaming mouse which has a really bright red laser light. If I power down the computer (but leave the power outlet on) the mouse still emits light, which is quite annoying. Any idea how ...
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4answers
9k views

What is keeping my PC from sleeping?

How can I find out why my laptop or desktop won't automatically go to sleep
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1answer
65 views

Low performance when charger is plugged in

I got this laptop: Dell Inspiron N5010 with i5 2,40GHz processor, 8GB Memory and a Kingston SSD. 4 months ago my charger`s pin jack has broken, but it was still working. I noticed that the ...
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1answer
109 views

Computer hibernates when I tell it to sleep

Problem When I tell my computer to sleep, it hibernates instead of sleeping. This occurs regardless of whether I tell it to sleep using the button on my keyboard or using the UI. Interestingly, when ...
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52 views

How to turn off a particular hard disk in a multiple disk computer system to save power?

Explanation: I have about 5 hard disks in my windows 7/8 machine. Since, the operating system is only installed in 1 disk, the rest 4 drives just consume power staying connected to the motherboard. ...
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1answer
46 views

What are the impact on underpowering my motherboard/graphic card?

I recently had to change my PSU and the one that was given to me has not enough power cables to fully plug every plug in the motherboard and the graphic card. It seems to work just fine though, and ...
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2answers
6k 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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2answers
35 views

What exactly do power plans do in Windows 7?

What do power plans do on a desktop PC? My computer has Balanced, AMD Power Plan, Power saver and High performance. When going to change settings, the only things to change are the display timeout and ...
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3answers
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How do I get my laptop's screen brightness settings back?

From when I bought it up until yesterday, my laptop would dim the screen automatically if you let it sit for long enough, and then if you hit a key or moved the mouse, the brightness would jump back ...
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3answers
1k views

Close lid to sleep just about and open lid to wake up asap without requiring password if done soon enough

I am sure at some point this tablet-like laptop was doing the thing I've briefly described in the title. That is, within the first couple of months that I've started using this thing. I am using a ...
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1answer
2k views

ASUS G51J - GPU overheats when plugged in to power, does not on battery power

The ASUS G51J comes with an nvidia GeForce GTX 260M. Running Windows 7. Running FurMark Stability Test, Full Screen, 640x480, MSAA Samples: NONE FPS starts at about 50, GPU Temp at about 100' C. ...
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1answer
46 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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0answers
38 views

How can I get the power consumption of a laptop in miliwatts? [closed]

I've seen programs which are able to retrieve the power consumption of a laptop in milliwatts, like BatteryInfoView (for Windows). I'm looking for something similar but more powerful, i don't care if ...
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0answers
36 views

USB device only works through a hub

This one kind of boggles my mind. I have an audio interface (Steinberg UR-22), which was working until this morning. I've tried plugging it into every usb port on my laptop while removing all other ...
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660 views

USB Suspend: USB Device not Entering Selective Suspend

After running 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 the USB ...
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2answers
6k views

Turn off USB power when closing MacBook lid

I have a USB-powered cooling pad under my MacBook Pro. When I close the lid to put my MacBook to sleep, I would like the cooling pad to turn off. In other words, I would like the MacBook to cut ...
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1answer
26 views

ACPI, computer turning on sporadically

Lately I've noticed that my GNU/Linux Gentoo desktop computer turns itself on sporadically while it is suspended in ACPI S3 mode. I have made no changes nor updates to the BIOS. In dmesg I see the ...
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1answer
906 views

powercfg.exe not working properly

os:Windows 8 pro x64 build 9200 (fully updated) I want to change the closing lid function through command line with powercfg.exe, so I gathered the required GUIDs and executed the following command: ...
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1answer
2k views

Is it possible to create individual power settings for each hard drive?

I have a number of different drives that I use for different purposes but I only use two of them frequently. I would like for the others to enter sleep mode when not in use, but never my main two. Is ...
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5answers
10k views

How to disable the screen (Linux without X)

I would like to know if there is any way I can disable the screen on a linux distro I'm using Debian. I found a few way to do that with X installed, but not without X.
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1answer
107 views

Windows Power Plan automation

I like to keep my Asus ROG G750JZ(laptop) on all the time and I have already automated sleeping at 01:00 in the morning, auto wake-up on opening the lid. However since I am not using the laptop all ...
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2answers
537 views

How to tell Windows 7 “sleep when laptop is closed, unless there's an external monitor connected; then use that”?

Most of the time, I would like my Windows 7 laptop to sleep when I close it. But sometimes, I like to connect an external monitor over DVI. I would like my laptop to use the external monitor when I ...
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3answers
2k views

Vista doesn't sleep - how do I diagnose?

Please note: I am not looking for a solution to the problem. I am looking for how I can get extra information to figure it out... give a man a fish, he's fed for a day. You know the rest. This is ...
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2answers
57 views

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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0answers
209 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
191 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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5answers
4k 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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3answers
3k 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
22k 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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0answers
65 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
151 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
21 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
7k 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
14k 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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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 ...
2
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1answer
458 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
106 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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0answers
12 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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0answers
217 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
2k 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
1k 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
97 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
2k 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
344 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 ...
2
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1answer
538 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
655 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 ...