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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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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0answers
242 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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0answers
19 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
11k 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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0answers
323 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
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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1answer
14 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
9k 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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0answers
21 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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0answers
9 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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0answers
9 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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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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0answers
35 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
50 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
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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3answers
55k 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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0answers
582 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
159 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
6k 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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26 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
70 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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0answers
14 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, ...
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1answer
532 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 ...
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1answer
29 views

How can I make my laptop hibernate/sleep when the charger is removed?

My laptop doesn't have battery. I'm using it with direct power supply. So the problem is that whenever the electricity goes off or when the charger is unplugged, my laptop shuts down and my work is ...
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0answers
22 views

Setting Closing Lid action via Powercfg command not working

I want to be able have closing the lid do nothing using a batch file. I see this post change lid option and have followed it but closing the lid still puts laptop to sleep. I am using command powercfg ...
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1answer
260 views

USB devices not waking PC from sleep on windows 8.1

I have a new build based on MSI H97M-g43 motherboard. None of USB devices are able to wake the PC back from S3 sleep. Two methods that do wake up the PC are the power button and wake timers. The usb ...
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2answers
961 views

How do I make my Geforce GTS 250's power save mode stop causing audio stuttering?

Whenever my GTS 250 enters its power save mode via Powermizer, downscaling its frequencies, my audio stutters. This affects both my onboard audio and my Audigy Soundblaster 2 ZS. Changing Windows ...
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0answers
20 views

Disable “Turn off Display After…” in Windows 7 Enterprise

Apologies if this query isn't very clear, it's my first time posting. I'm on a laptop as a user on Windows 7 Enterprise. I have full admin rights on my machine and the network but still cannot figure ...
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1answer
594 views

Effects of Nvidia graphics card aperture change

I have laptop with nvidia 8200M G.In BIOS setting I can adjust the aperture size from 64 MB to 512 MB.This change reflects as increase in the available RAM. Considering that I don't play ANY games as ...
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1answer
305 views

Why won't PC laptop completely power off after upgrade to Windows 10?

I have recently upgraded from Windows 8.1 to Windows 10 and it appears that it mostly successful. By and large I'm pretty happy with the upgrade however there is now a problem with turning off my ...
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1answer
2k 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 ...
2
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1answer
2k views

Win XP Screen saver / power management not working

I have a PC running Win XP, and even though I have the power management set to turn off the monitor after 10 minutes, and I have the windows screen saver set up, many times they never kick in. I come ...
2
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2answers
684 views

How to run commands when mac is idle and when it resumes

I want to run script when my mac is idle (for example after 5 minutes or screen saver start time is also ok) and when I resume it from idle state. I know that I can write daemon using ...
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2answers
3k views

How to use MacBook Pro with external monitor / keyboard / mouse while running on battery only?

I'm using my MacBook Pro like a desktop sometimes. But for some reason, when I unplug the Power Supply, it is impossible. The MacBook Pro immediately shuts off. When I turn it on by hitting any key on ...
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0answers
252 views

Windows 7 on 1st Gen Macbook Pro (Q4-2008), power management problems

I have the first generation macbook pro, purchased Q4 2008. I've been trying to run Windows 7 and can get it all installed great with the BootCamp 3.1 64 bit drivers however ... power management isn't ...
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0answers
896 views

Effects of enabling DVFS in a CPU

I came up with this energy regulating software called Granola while reading at Ghacks.net I downloaded and installed the software but you need to enable the DVFS function in the CPU. I booted up and ...
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3answers
1k views

Turn off backlit keyboard when computer goes to sleep

I just bought a backlit keyboard from a not so known brand. It doesnt have any good drivers. My issue is when I put my computer to sleep or even turn it off, all the leds underneath the keys stay on. ...
2
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1answer
321 views

Power states in Windows

Does anybody know or have a link to documentation on how the Power Manager of Windows, determines to go to the ACPI power states S1-S4? Are there any settings that can be configured? I know that by ...
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0answers
9 views

brightness settings gone, how do I take it back?

I have ACER laptop with Windows 8, after I change it to Windows 7, my screen brightness controller are gone (Not in power options). I tried going to the device manager, then I click monitor and it ...
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0answers
345 views

How can I stop my laptop waking from suspend as the lid is closed?

I have an Alienware M17x with Kubuntu 14.10. When I suspend to RAM and close the lid, very often it will wake up after a few seconds of sleep. Sometimes not. I get the feeling it's related to how ...
2
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1answer
2k views

Windows 7/ATI graphics: GPU fan speeds up when display goes into sleep mode

I am using Windows 7 Professional 64-bit with an ATI Radeon HD 4870 video card with latest drivers (Catalyst 12.4). In normal desktop Windows use, the fan of my video card powers down and is so quiet ...
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1answer
283 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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3answers
6k 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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4answers
2k views

Does a cable internet connection remain active during a loss of power in the apartment building?

I live in an apartment building in Czech Republic, Europe. I have a cable internet connection with a static IP connected to an Ubuntu server I set up. Recently out building lost power, though the ...
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0answers
767 views

Windows 7 won't wake when opening lid

I've got a Samsung Series 5 laptop running Windows 7 SP1 Home Premium, fully patched. It used to wake up from sleep by opening the lid, when I would put it to sleep by closing the lid. Unfortunately ...
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0answers
384 views

Sempron 3500+ never clocking up (always at 800MHz)

According to CPUID CPU-Z and Windows Vista resource monitor the AMD Sempron 3500+ (1800MHz) in this Packard Bell Easynote SJ51 is never clocking higher than it's lowest speed. It's running at 52C so ...
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2answers
1k views

Does Laptop's Battery Condition Power When On AC?

I doubt about this, but still want to hear what others think. UPS condition power but does laptop's battery condition power?