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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1answer
21 views

How to make server power settings apply even when computer is activated by WOL

I have a computer with 9 hdds as a storage server in the next room for me and my family (movies and such) connected to the router. The computer is without keyboard and monitor, all works fine, but in ...
0
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1answer
20 views

Samsung monitor not going into power saving mode

I have recently bought a Samsung LT24D390 TV monitor, which I connected to my computer using a HDMI cable; the video card is a GeForce GTX 560 Ti, the O.S. is Windows 7 x64. The monitor works as ...
0
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1answer
5k views

Enable Lenovo's “conservation mode” on boot

I have a Lenovo Z50 laptop with Lenovo's Energy Manager installed. Inside the manager's settings menu is an option to enable "conservation mode", which keeps the battery charged in the 40-65% range ...
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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 ...
0
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0answers
32 views

How to fix Ubuntu 14.04 suspension - abruptly suspends and after manual suspension unsuspends

I had a problem when I closed my lid the desktop did not suspend so I read this post however this did not help so what I did is to rollback now my files looks as attached below. However now I have two ...
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1answer
30 views

UBS 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 ...
0
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1answer
26 views

Boot computer on bringing it to power

I'm trying to reach following: I have a multi master/slave power point. My computer is plugged in into the master slot. The whole multi power point is plugged in into a radio power point I can ...
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0answers
46 views

Wake on LAN cause computer wake up immediately after shutting down

I've installed Ubuntu on my Dell PC, and i want to use Wake on LAN. But here i encounter a weird problem. The computer will wake up immediately after shutting down. Here is what i've done: The ...
0
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2answers
5k 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 ...
0
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1answer
367 views

What is the “known hardware incompatibility” that disables PCIe Active State Power Management? How do I fix it?

I'm on Windows 7. I just ran a Power Efficiency Diagnostics Report through powercfg -energy and I got this error: Platform Power Management Capabilities:PCI Express Active-State Power Management ...
3
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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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1answer
38 views

Windows 8.1: How to tell power management to ONLY TURN SCREEN OFF when closing the lid?

I was expecting to find another option in my laptops power management when I close the lid, but all I found is those 3 options: Do nothing Sleep Shut down In an old ThinkPad running Windows 2000 ...
0
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1answer
52 views

Keep dual-monitor settings in Windows 8.1 after closing laptop lid

I've got a Dell XPS 15 laptop connected to a (rather old) Dell 2408WFP monitor via HDMI. I want to use only the monitor when I'm at my desk, so I've set Windows to show the desktop there and switch ...
0
votes
1answer
49 views

My laptop will not sleep when I close the lid

I've tried to look into everything I know of but this has stymied me. I have a Lenovo Thinkpad Edge 15" currently running Windows 7. The laptop will not enter sleep mode when I close the lid. When I ...
0
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1answer
956 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
45 views

Why does unplugging my laptop from power reduce power consumption?

I want to save unneeded energy. Because of that, I changed my energy settings to power save mode. However, once I switch off the power supply for my laptop, the energy consumption and CPU tact goes ...
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0answers
11 views

Screen brightness

I bought a new Core i7 HP Pavilion 15-r122ne with Windows 8.1 preinstalled and Nvidia Graphics. I am new to Windows 8. When I am using laptop on battery and I launch different apps or pages the ...
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0answers
44 views

“No Battery is Detected” but battery works

The Question: How do I get my battery to be detected again? My system is dual boot Windows/Linux. On Linux, for a while, the system claimed that the battery was always at 15%. Now, it says there's ...
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0answers
31 views

Harddrive spinning down though time increased with hdparm

I have an external harddrive connected via USB. The usual method to set the spindown / standby time of harddrives seems to be using hdparm. So I run sudo hdparm -S 200 /dev/sdb and get /dev/sdb: ...
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1answer
348 views

Stop Windows 7 poweroff on critical error

How do I stop Windows 7 from powering off in the even in the event of a critical system error (or whatever error causes that)?
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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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0answers
14 views

Strange behavior checking disk power state

After sending the command to put a traditional hdd drive to sleep, via hdparm -y , I get a very strange behavior: If I execute this command: while [ 1 ]; do smartctl --nocheck standby -i /dev/sdb ...
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0answers
52 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 ...
7
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6answers
7k 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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6answers
8k 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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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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2answers
201 views

Is there any way to disable automatic head parking of a HDD?

My hard drive semms to park its head after X minutes, and when I access it again it loads the head in a fraction of a second (causing a small beep),and causing disturbances to media streamed from it. ...
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votes
1answer
56 views

What is the procedure for totally disabling HDD spin down on Windows 8?

I'd like to totally disable all HDD spin down on my system that I use for music production. Is Control panel/Power options/.../Turn off hard disk after the place to go or are there any other settings ...
0
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1answer
176 views

What is the best free method of approximating Windows 7 power management in Windows XP? [closed]

I previously had Windows XP Tablet Ed. on my HP TC4400. Now I have Windows 7 installed on it and I've noticed quite a substantial increase in battery life, in particular when using the power saver ...
3
votes
1answer
11k views

How to keep a hard drive from going to sleep?

I have two hard disk drives in my Windows 8 desktop. The issue I am having is that the secondary hard drive goes to sleep frequently (I assume do to inactivity while I am only using the primary ...
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votes
7answers
12k views

How do I stop laptop from underclocking?

My Dell M1530 never seems to run at its full clock speed, regardless of the tasks I throw at it. To diagnose this I have my Dell M1530 configured to use 100% CPU clock speed at all times (regardless ...
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1answer
17 views

Setting up customizable power options for different activities (reading, listening to music, etc.)

How can I set up various configurations of customized power options for different activities? Settings I would like to configure: Reading Mode -> screen never goes to sleep, low performance, dim ...
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5answers
23k views

Windows 7 Goes to Sleep in conflict with Power Option Setting

My Del Dimension E521 running Windows 7 puts itself in sleep mode each night -- despite the fact that I have chosen a power option that specifies NEVER Each morning I find the monitor blank and I ...
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0answers
15 views

How accurate is Windows Power Plan timers?

I configure a power plan to put system into sleep in 2 minutes, and then apply the plan. I observe the system sleep time from the last keyboard or mouse input, and the results vary from 1 min 40 s to ...
6
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2answers
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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0answers
36 views

How can I set the hard disk spin down time per drive in Windows 8?

I'd like to set the hard disk spin down time for each drive individually on a Windows 8 system. One drive that is not used so often could be allowed to spin down, and another one that is used for ...
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5answers
53k views

How to turn off the display in Windows 8 without locking or making computer go to sleep?

How to turn of the display in Windows 8 without locking or making computer go to sleep ? The problem is that when I enable ‘Turn off display after x minutes’ feature from control panel, the device ...
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votes
4answers
11k views

Does a UPS charge it's battery even if my computer is turned on?

I bought a new UPS and the manual says something like "the UPS must charge for 24 hours before it can work properly..." My question is, does it charge even if my computer is turned-on or should I ...
0
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1answer
100 views

it possible to disable HDD after 20 min idle but not SSD (Windows 7) [duplicate]

Hello my operating system is Windows 7. I have 3 hard drives: 1 SSD (which hosts Windows), 2 HDD (just a file storage) Is it possible to turn off HDD after some idle time but leave active SSD? I ...
0
votes
1answer
94 views

Unable to start computer with docking station button while connected to a docking station and laptop lid is closed, but when open, works fine

Basically I am placing a laptop on a docking station within a cart and placing the laptop inside the cart and closing the lid, then connecting an external monitor to the cart w/ keyboard and mouse ...
0
votes
1answer
87 views

how to configure wifi power management in debian jessie

I have a plain Debian Jessie installation on my Thinkpad x230. Everything works smooth but I noticed that wifi powermanagement is set to 'off'. I can activate power management manually but after ...
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votes
5answers
731 views

How do I set my power plan to turn off the display in less than 1 minute?

The lowest setting in a Windows power plan under "Turn off the display" is "one minute". How do I set it for 30 seconds, 15 seconds, et cetera? I found that the shortest idle duration time you can ...
0
votes
1answer
64 views

Repeatedly the “turn off the display” setting is set to “less than a minute” - what's the cause?

I have this problem at my helpdesk: On a Windows 7 computer the screen goes into standby mode just a few seconds after a key is hit or the mouse is moved. Looking into the Power Options in the ...
0
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0answers
15 views

Are default NUT settings fine? (about UPS configuration)

On Debian Linux jessie: After buying an UPS and installation of nut-server and nut-client at my PC and configuring the ports and the protocol, do I need to adjust time and/or percentage parameters, ...
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1answer
1k views

Power plan keeps getting changed to 'turn off after 20 minutes'

In Windows 7, I go into the Control Panel and select the Always On power plan - it should never turn off the display or put the computer to sleep, but it keeps reverting to turning off the display ...
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2answers
7k views

Diagnose slow wake up from sleep

My new work computer (Dell Precision T3600, 16GB RAM, SSD) running Windows 7 takes roughly 40 seconds to wake up from sleep mode. How can I diagnose what's taking so long? And what can I do to reduce ...
9
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6answers
12k views

In Windows 7, why won't my display stay off despite the power settings saying it should?

I'm completely stumped by this. My simple use case is that when I'm in bed, I use a cordless mouse to browse the web, watch videos, etc. - the monitor is across the room. When I'm going to sleep, I ...
2
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0answers
77 views

Script to put Windows 8 to sleep and wake up in 5 seconds

How can I put Windows 8 to sleep(standby) and then wake up in 5 seconds? I know I can use psshutdown -d to sleep, but then how can it wake up on a timer?
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3answers
166 views

Why does reducing CPU frequency improve battery life?

Shouldn't we have roughly the same battery life regardless of the frequency since the higher the frequency is, the faster tasks will complete so in the end the CPU, despite running at a higher ...
0
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1answer
311 views

How to let my laptop automatically hibernate after sleep in Windows 8.1?

I have looked through the advanced power setting but didn't find out a method. What I want is to let my laptop automatically hibernate after certain minutes of sleep. But if the laptop is not ...