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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287 views

How to wake a sleeping laptop

I have an old compaq pressario CQ61 that's getting a bit old and I'm trying to convert to a media server. I want to put it by the TV and leave it mostly alone, and manage remotely (via RealVNC). Now ...
5
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2answers
8k 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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0answers
247 views

HP 2000-bf69WM doesn't wake from sleep after downgrading to Windows 7

I have an HP 2000-bf69WM laptop that originally shipped with Windows 8. I have since downgraded it to Windows 7 Ultimate x64 SP1. I have installed all the drivers from HP's website for the laptop, ...
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1answer
94 views

Why is my computer constantly resuming from sleep?

My recently reformatted Windows 8.1 machine keeps resuming from sleep. This is an acute issue ever since I got my SSD (the reason for the reformat), as Hybrid Sleep is out and the system does true ...
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1answer
34 views

Close programs when on battery

Is there a Windows application or a script that kills programs when my laptop in not plugged in (and preferably relaunches them when charging)? I have a few background applications that use too much ...
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2answers
2k views

Change Behavior of Linux Power Button

I have a headless linux mint machine that I use for a file server and other things. It's been working great for me for a few years, but there's one issue - my cat likes to hang out on top of it, and ...
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0answers
87 views

Disable 2 cores to meet 95w TDP

I have a Phenom II X4 965 BE CPU on a M5A78L-M LX/BR motherboard. The motherboard supports processors of maximum 95W TDP. The CPU is 125W TDP. So I disabled 2 cores of the CPU trying to avoid the ...
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1answer
708 views

OpenSuse 12.3 gpu fan speed

I won't go into the details of what I tried and simply explain what I want. graphics card: AMD HD 4870 So I'm usually working with Windows 7 and my gpu is at 54C with 30% fan speed when idle. Now I ...
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1answer
128 views

How to know which /proc file is used to set the backlight?

How to know which /proc file is used to set the backlight ? $ ls -1F /proc/acpi/ returns : ac_adapter/ battery/ button/ event wakeup xbacklight works. I use awesomeWM with Ubuntu 12.04, on a dell ...
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1answer
3k views

Something's turning off my hard drive

I have an Acer Aspire V3-771G laptop With Intel chipset and NVidia 650M Graphics, running Windows 8.1 pro. The laptop has 2 hard drive slots. A few weeks ago I installed an SSD in my laptop. I ...
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1answer
418 views

HDD randomly turns off and then on

I have problem with my SATA HDD - it shutdowns itself from ocassionally, and then almost immediately turns back on again. It's system drive and the only one in my PC. I've disabled turning hdd off in ...
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1answer
183 views

Why is my monitor turning off after inactivity when power settings tell it not to?

I'm running Windows 8.1 Pro and a Radeon HD 6670 with the latest ATI drivers. I've noticed lately (maybe within the past month or two) that my HDMI out will turn off after not being at the computer ...
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2answers
119 views

Win8 on laptop: lid turns off only the monitor

I have an Asus S400CA with Win8. When I'm home I access it with VNC. I'm trying to config its power settings so that, when it's plugged on AC, when I lid close it, only monitor is turned off and ...
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0answers
1k views

Wake-on-LAN stops working after a few hours

I have a Linux server (Ubuntu 12.04.03) which serves as the internet gateway for our LAN of about 15 PCs. That is, eth0 on the Linux server is the Internet, and eth1 plugs into an unmanaged switch (a ...
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0answers
80 views

Why deleting a file in windows re-spin / wake up / power up all the hard drives?

If I delete a file on HD 1, and HD 2 is sleeping (power down), windows spins it up for some reason. I'm using the regular recyle bin. Turning off the recycle bin for all partitions on HD 2 won't help ...
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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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1answer
107 views

Laptop will not power from battery

I have an Acer Aspire 7551G that will not power from battery, the AC adapter must be connected for the machine to boot and as soon as the adapter is removed the laptop instantly dies. The contacts ...
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1answer
1k views

Wake-on-lan from S5 and prevent network card from turning off

I'm tired googling and looking through hundreds of forums, please help. OS: Windows 7 64-bit Motherboard: ASUS M4A77T/USB3 Onboard network card: Realtek® 8112L The problem is that network card keeps ...
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1answer
67 views

Is an event registered when a monitor comes out of Power Saving Mode?

I am using task scheduler to fire a program when someone logs in, unlocks the station, and I would like to do it when the screen turns back on prior to locking. IE the power savings turns off the ...
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1answer
1k views

Disabling AppNap for Terminal

How do I disable AppNap for Terminal? Get Info on Terminal does not have Prevent App Nap check box An alternative is to turn the NSAppSleepDisabled flag on, but will it actually work? $ defaults ...
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2answers
435 views

Windows won't sleep

My Windows 8.1 PC suddenly decided it no longer wants to go to sleep. If I explicitly put it to sleep then it stays in sleep mode, but it doesn't obey the power plan setting to go to sleep after 30 ...
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1answer
1k views

turning display off while playing video file in vlc player

Does there is any option or settings (native to vlc player or windows) to automatically turn off the display when playing a video in it.. Could be handy when want to listen only to audio and making ...
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0answers
98 views

Closing the lid of my notebook doesn't have any effect

When I close the lid on my Samsung 900x3c-A01 nothing happens, both on Windows and Linux... I've made double-sure all the OS' settings are correct, I even tried to set them up so they would shut down ...
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0answers
145 views

Reducing CPU load to absolute minimum

I have had a couple of things gone missing I believe stolen in my shared apartment and want to run my laptop constantly with a webcam attached, running webcam surveillance software to record/ take ...
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2answers
555 views

How to limit my CPU power programmatically on Windows 7?

Whenever I run a CPU-heavy activity (like compressing a big set of files into an archive for example) my CPU switches to its full throttle (maximum frequency) and shuts down of overheat in less than a ...
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1answer
2k 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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96 views

Disable screen power save mode when external monitor connected

I have a laptop with a HDMI connector (NVidia gfx), is it possible to stop the screen from going into power save mode only when I have something connected to the HDMI connector?
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1answer
74 views

How effective is to blacklist GPU to avoid power consumption? [closed]

I blacklisted my NVIDIA graphic card by putting it in /etc/modprobe.d/blacklist.conf, I would like to know how it reduces my power consumption
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2answers
493 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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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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1answer
1k 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
44 views

manage hardware power supply

How can I manage power supply? (if it's possible of course). Since my charger doesn't supply the needed energy, I need to reduce/remove power from some devices in order to let my processor run full ...
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2answers
5k 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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1answer
853 views

extract power plans from saved registry

I need to restore Windows 7 power plans. I saved full registry on an old PC (also Windows 7), that PC is not available any more. How can I extract power plans from the saved registry?
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1answer
301 views

Power scheme not applying in Group Policy

I've created a new GPO and created a power scheme under computer configuration. I've disabled the User configuration part of this GPO. In this power scheme I have the action selected to create a new ...
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2answers
512 views

Low processor performance after removing and then plugging the power cord

It's really confusing. When plugged in, everything is lagging. On battery everything goes smooth, three times as fast. I looked into power options, set everything to default and tried the three ...
3
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1answer
2k views

Off vs standby. Which is better for an office laser printer?

At an office where I work, there is a Samsung CLP-310 laser printer: The staff turn this off every evening. Right off -using the hard power switch on the back. They are trying to reduce their ...
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1answer
63 views

PC turns off abruptly [closed]

I had to press my PC's power button for about 60 to 90 seconds to turn it on. After it boots it works for about one hour. After this hour the monitor goes blank. Power and hard disk LEDs are ok with ...
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2answers
521 views

Is it safe to add or remove any type of device while in sleep mode?

Is it safe to add (plug in) or remove (unplug) any device while Windows is in sleep (a.k.a. standby, a.k.a. suspend) mode? What type of devices can be added or removed in this manner? Can you do this ...
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0answers
45 views

Is it possible to use IGP and Dedicated graphics like nvidia's optimus? [duplicate]

Pretty much like the title says. I'm curious if it would be possible to use my dedicated graphics card for gaming and other intensive tasks, while using my IGP for general usage to get power usage ...
4
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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 ...
0
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1answer
151 views

How can I view events that cause laptop screen to turn on from standby (but not sleep)?

On a Windows 7 laptop, is there a way to see exactly what device or process triggered the screen to turn on? I'm referring to the "screen off" mode where the notebook is still on, but the screen has ...
1
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2answers
393 views

Hook system power button in Windows

I have a headless computer running a custom service that I want to enable/disable using the power button, rather than having to remotely connect every time. The computer does other things as well, so ...
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0answers
74 views

Computer randomly powered off at exactly 3 am

I am running a Zentyal server at home, set up to run as a gateway, file server, etc. It is running on a fairly standard computer with standard hardware (Intel i3, 8GB RAM, 300W power supply). A few ...
0
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1answer
619 views

Monitor turns on when computer accessed remotely by Remote Desktop user

I am running Windows 7, service pack 1, 64-bit, NVIDIA GeForce 8800 GT. I used Power Options to configure the monitor to turn off after 10 minutes of inactivity. This works fine when I use the ...
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2answers
5k views

Windows 8 custom power plan keeps resetting itself

I just got a new Haswell laptop, and was experiencing very short battery life: about 3-4 hrs with minimal use. I knew this had to be wrong, so I checked the power plan, and found that "HP Recommended" ...
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1answer
5k 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 ...
2
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2answers
385 views

Do ULV Core i5 CPUs consume same power as i7 CPUs if they use same TDP?

Title says it all really: If you have a Core i5 CPU and its TDP is 17W and there is a Core i7 CPU which also has TDP 17W, will they consume the same battery power even though one runs faster? I am ...
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1answer
485 views

How do I detect Windows turning on/off display (going to away mode)?

I'm trying to find a way to detect when my computer decides I've been away (no user input) long enough to turn off the display. That also means I'm not watching movies and the OS is not prohibited ...
2
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1answer
3k views

disabling power save option on wifi device

I use usb wifi dongles that have AR9271 chipset and use compat driver 3.9.1 - ath9k_htc. I use the wifi units to create an ad-hoc wlan. When there is no communication for a while, the nodes leave ...