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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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 ...
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4answers
5k 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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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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15 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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19 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
28 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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1answer
31 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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11 views

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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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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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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4answers
9k 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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19 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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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
17 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
910 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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1answer
3k 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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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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15 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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12 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
26 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
592 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
35 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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21 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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55 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
471 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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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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30 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 ...
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3answers
12k views

Power LED always stays on after shutting down the laptop

I am using a Dell n5050 laptop, recently I noticed that I have a problem with my laptop. Namely, the power LED always stays on after shutting down the laptop. I've found two options: long press of ...
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2answers
2k views

Slow computer on low wattage charger

I run windows 7 on a Dell latitude laptop. I use on my laptop a charger from another, older laptop - both Dell. I got this message: The battery charges very slow - I understand this, not enough ...
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324 views

Disable External Wester Digital MyBook from spinning Down

I have this external hard drive for my cloud; and it constantly spins down. I do want it to do so. How do I disable this at the hardware level? I am able to disable this on my seagate drives at the ...
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1answer
40 views

Issue with Windows 10 Lock Screen Shutdown

I have built a Windows 10 Enterprise image that is being deployed to a combination slate/laptop device (Dell Inspiron 11 - 3153). I am specifying the power settings through SCCM 2012 R2. I have built ...
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2answers
10k 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, it restarts. No blue screen, no hanging program, just ...
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24 views

PC turn on automatically at intermittent time

After I turn off my computer (or hibernate specifically) It turn on automatically. It seem not to happen regularly. (Or I think so). I tried to disable all scheduled tasks with "Autoruns" program, ...
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14 views

why is audiodg.exe interfering with power management?

I have an Intel Core i3-370M 2.40Ghz, running Windows 7, that is stuck at 2.4ghz. Months ago, the computer was almost completely silent. Today, the clock multiplier is stuck at x18 and the fan runs ...
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11 views

How to make logind act different when power line plugged-in or not?

I am using Arch Linux and use logind to handle acpi. There is only one acpi event HandleLidSwitch. When closing the lid I want my laptop to act differently based on the current power source. For ...
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1answer
1k 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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36 views

Windows: unexpected power button behavior

The semantics of hardware power button is as simple as that: when it is ON it switches OFF, when it is OFF it switches ON. And now some UI geniuses have perverted even this function. When it is ON, ...
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1answer
68 views

Is there a way to “hack” the power options in Windows 10, e.g. change from to 100% instead of 60?

In this link is said There is nothing that a user needs to do manually, to maximize battery health on these batteries. For this reason, we don't provide any utility to manually manage battery ...
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3answers
57k views

How do you check how much power a USB port can deliver?

Some laptops have a special USB port that can deliver more power than the other ones. However it is not always easy to identify which one is the good one, nor how much power it can deliver. So is ...
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600 views

Is there a way to disable power management on a Seagate ST2000DM001 harddrive completely?

After I bring my Seagate ST2000DM001 harddrive offline using Diskpart, then spin it down using HDDScan for Windows 3.3, and then finally disable its device driver using DevCon so that AFAIK no ...
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3answers
210 views

PC restarts on power outtage despite having a UPS

Unfortunately where I live I do not have 24/7 electricity. My new PC rig which is considered to be a high-end(gaming) system is connected to a brand new APS/UPS that have these specs: DC-AC ...
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3answers
7k 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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35 views

How to save battery life for notebooks always connected to the AC grid

I have a Toshiba Satellite L50-A-161 with a Li-ion battery. The removal of my Toshiba battery is quite complicated: it is necessary to open the case unscrewing 14 screws and remove the dvd unit. The ...
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1answer
80 views

NVIDIA Optimus: Find out what is using my laptop's discrete GPU

My laptop has NVIDIA Optimus technology, which seamlessly switches between the integrated graphics and NVIDIA discrete GPU to provide an optimal balance between battery life and performance. There is ...
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17 views

Surface pro 3 weaker processing while plugged in

I am encountering a strange issue in that my Surface Pro 3 seems to run more slowly (more lag in games) when plugged in, and I was wondering if anyone on here might have experienced a similar issue, ...
4
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1answer
548 views

Ubuntu - application-specific power management

I listen to lots of music while doing non-computer related stuff and my laptop falls asleep after 30 mins, as per my power settings, so I have to go back to the laptop to wiggle the mouse every now ...