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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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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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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31 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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44 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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33 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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28 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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73 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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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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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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56 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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79 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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40 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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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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357 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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142 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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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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37 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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154 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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78 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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62 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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37 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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26 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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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 ...
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213 views

Laptop keeps waking up from sleep (Windows 7)

Laptop is fully charged before I put it to sleep and when I come back more than 12 hours later and resume it, the computer only has around 10% left. I have used the powercfg lastwake and powercfg ...
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103 views

How can I monitor CPU frequency on Linux servers?

At low CPU frequency, latencies can be higher or we may come to some wrong conclusions related to server capacity. Knowing the CPU frequency is important for high performance scenarios. In case of ...
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168 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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491 views

Linux Mint 16 on HP Pavilion dv6 laptop - power management doesn't work

I installed Linux Mint 16 on my HP Pavilion dv6 laptop. On Linux, my laptop always seems to be under load (fan spins at full speed etc.) Is there any power management tool / driver that could help ...
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235 views

are APM levels (hdparm -B) and spin-down time (hdparm -S) different?

The man page referenced in this answer indicates that hdparm -S sets the spin-down time, while -B sets the APM level, and also suggests that -B is a hardware thing (implying -S is software?) However, ...
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105 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 ...
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63 views

win 8.1 can't sleep automatically after hibernating

There have been many post online about win 8.1 not entering sleep mode, my problem however only happens after I wake the device from hibernation (data saved to memory, power off). laptop: Asus eee PC ...
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3k 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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106 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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54 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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63 views

Games hang in “Balanced Power” mode

My PC specs: AMD FX-8320 @ 3.7 GHz (stock cooler), 8GB 1866 MHz RAM, XFX R9 280X (OC'd @ 1.25v), ASUS M5A97 R2.0, Corsair TX750. While playing games like Dead Space 3 and BF4 and other ...
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94 views

Sleep hard disk after X minutes of idle

I want to make two drives sleep after 15 minutes of idle (sdb and sdc) on Linux Arch. I have the idea that hdparm should be able to help me. I can put the disks into standby (hard disk spins down, ...
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28 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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517 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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51 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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430 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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54 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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864 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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179 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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90 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
71 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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327 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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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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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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70 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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Ubuntu: Do not show display state when resuming from hibernation

I'm using Ubuntu 13.10 saucy on my laptop. The device is set up to suspend when the lid is closed, prompting for the password when resuming. However, when I resume, the last state of the display ...