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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Automatically disable devices to save power and mitigate DMA attack in Windows 7

Some OEM include energy saving apps that can switch off certain devices such as webcam or optical drive. Is there any brand-agnostic app out there that can do it? If the list of disabled device is ...
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1answer
2k views

Vista laptop keeps waking up a minute after I put it to sleep

I have used the command powercfg -lastwake to determine what is waking up my computer. Here is what it produces in prompt Wake History Count - 1 Wake History [0] Wake Source Count - 1 Wake ...
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1answer
198 views

Spin down hard drive while on treadmill (or car or any other shaky environment)

I have a laptop with 8GB of RAM running Windows 7. Is it possible to completely shut off the hard drive while browsing the web? I use Firefox. I figure I would need to do this if I wanted to prevent ...
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3answers
338 views

Is it possible to reduce graphic processor power consumption?

Is it possible to reduce graphic processor power consumption? My notebook powered with nVIDIA GT230M graphic processor and its power consumption is about 45W, it eats my battery! Other Specs: ...
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1answer
801 views

Detect when hard disk goes to sleep

Is it possible to trace when Windows turns off a hard disk (due to the power saving threshold being met)? I'd like to see when (if at all) the disks are being turned off.
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4answers
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How to track which program causes my harddrive to spin up

I have a strange problem: Every half hour one of my hard disks gets powered on again. I recognize this by the sound of a hard disk spinning up. So far I was not able to track which program could ...
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1answer
1k views

Understanding battery information

My laptop is Lenovo T400 and OS is Ubuntu 10.10. Here is information about my battery: $ cat /proc/acpi/battery/BAT0/state present: yes capacity state: ok charging state: ...
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1answer
2k views

Frequency Scaling Monitor for Windows

What program is there to monitor the current CPU frequency (not the nominal CPU speed) on a Windows 7 system, similar to the Frequency Scaling Monitor applet in GNOME?
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9k views

How to definitely turn off “display sleep” in Ubuntu?

After turn off "display spleep" it Power Management the screen continue to slow go dark after some minutes of inactivity. How/where to turn off this? --update On AC Power (I never use it on batery), ...
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1answer
161 views

Linux: Real-time Battery Power Usage

Is there a package for getting an accurate reading on the current total battery power usage in Watts on any system?
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1answer
306 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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1answer
124 views

Why doesn't a phone li-ion battery die for 5 years and a pc li-ion battery dies in 1-2 years? [closed]

WHat is the major factor? heat?,size? consumption style like full discharge?
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1answer
544 views

How to reduce power consumption on laptop when running Ubuntu

I am having Ubuntu 10.04 on my laptop. The battery doesn't last as long as it does when on Windows. Any thing we can do to improve it ? Its a Lenovo Y410 notebook with core 2 duo processor and 2 ...
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2answers
5k views

How to automatically shutdown laptop if unplugged

I want my laptop to shutdown automatically after it gets disconnected from power. Can someone tell me if there exists some app for this for Windows 7
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2answers
8k views

is there a way to force a computer into sleep mode at certain times?

for example, to save electricity. Could you make a domain policy that makes a pc go to sleep between the hours of 9 pm and 6 am. You can always turn it back on. It just goes to sleep unless it's ...
4
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1answer
163 views

What is the minimum length of time it is worth hibernating my laptop? [closed]

I have a Windows XP laptop. I rarely reboot and usually just hibernate it when I'm finished using it. If I'm going for lunch for an hour for example, I will always hibernate. However, if I'm just ...
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2answers
934 views

Will a 300W UPS work fine if my PSU is 500W?

I am getting a UPS (Uninterrupted Power Supply), currently here are my options: http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BE500R-PH ...
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4answers
150 views

At what point does shutting a computer down become preferred to leaving it on from a longevity standpoint [closed]

As the title says. Basically, I have two small home NASes, one that backs the other up. Each has a bunch (5) of 2TB drives in RAID5. I'd like to turn the backup NAS off, but I run daily syncing. ...
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1answer
2k views

Is there analog of aticonfig --set-powerstate for open source radeon driver?

I'm running Ubuntu 9.04 on relatively old laptop with ATI Mobility x600 inside. On the last version of Ubuntu, when I was able to run proprietary fglrx driver, I was able to slow down graphic card by ...
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0answers
179 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 ...
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7answers
224 views

Likely reason for not being able to power on an older computer?

I demoted my older desktop computer to a server a short while back and it has always had some sort of problem with powering on after a complete power loss. For instance, right now it's powered on and ...
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3answers
1k views

How to plug-in this hard drive?

I need to install this hard drive "WD800JD-60JRC0". It is Serial ATA. But what really confuses me is that it has molex connector. I think I can plug what I want: SATA power cable or Molex. But which ...
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What Is AVR Mode In UPS Software Management?

When UPS was disconnected from power source and 25W desk lamp was connected to it, all was normal: But as soon as i have unplugged it and plugged in 95W fan, AVR "Normal" changed to up arrow: ...
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Does a graphics card use electricity if it's installed but not being used?

I unattached my monitors from my PCI-E video card and attached them to the onboard video card. I'm not using the PCI-E card anymore. Is it using any electricity? Should I uninstall it? Will I save ...
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3answers
173 views

How do I save power when Idling?

Let's say my computer is downloading a huge update, or maybe I want to perform a slow virus-scan that's likely to take hours. The question is, my machine is gonna be up all night, sleep/hibernate is ...
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1answer
13k 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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3answers
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Are there any benefits to ejecting my internal hard drive?

I have an SSD in my MacBook Pro as my boot drive. It also houses all of my applications, documents, etc. I replaced the optical drive with a mount for the original hard drive, which I only ...
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1answer
66 views

Power loss on home server setup

I have a mac mini server running at home. It acts as a web server and a file server. Recently, they have been doing construction on my street, and power will dip on and off 2 to 4 times per day. I ...
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In Ubuntu 9.10, how do I disable the “Your battery may be old or broken” notification on log in?

Every time I log in, I get this message. It's helpful to see once, but I don't need to see it every time I log in. Is there any way to disable it?
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3answers
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What is the recommended delay to put LCD/LED screens to sleep?

My LCDs and LEDs screens are configured to enter sleep mode after 5 minutes of computer inactivity, and I have being using this setup for years. Today, I was wondering if I could lower this delay, ...
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4answers
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Processor energy management in Windows 7

What does it mean to set the cpu's top performance at 60% under a Windows 7 power plan? I have an intel atom processor at 1.66Ghz, does that mean it will act as underclocked at 1.00Ghz? Or are there ...
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5answers
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How can I monitor battery state on a laptop running FreeBSD 8?

Is there any console tool that can be used to view battery status on a laptop (Dell Vostro A860) ?
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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 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
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Windows 7 directly turn monitor off when just listening to music

Windows 7, Laptop DELL XPS 1330: When just listening to music, I want to turn off my laptop display immediately. It perfectly works after the usual delay (e.g. 10 mins) set in the power management, ...
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5answers
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Forcing Windows to be 'awake' during certain hours?

I'm running Windows 7 and have the power options currently set up to put the machine to sleep after 2 hours of inactivity. Is there any way to force the machine not to sleep between certain hours, or ...
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2answers
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How much electricity does an external USB hard drive use when it's not being used?

My external USB hard drive requires its own power source. I noticed that if I don't use it for a while, and then try to access it later, it takes a while to startup, meaning that it was in some kind ...
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3answers
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Computer hangs due to underpowered UPS?

I just bought a new UPS. Now since I started using it I experienced at least 3 random freeze in Windows 7 and it happens during the first 10 minutes of start-up. Note when I say freeze, I mean I ...
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641 views

What will the laptop do if I close the lid when plugged in then unplug it after I've closed the lid?

If my laptop is set to "do nothing when I close the lid when plugged in" and "hibernate when I close the lid when on battery, what will the laptop do if I close the lid when plugged in then unplug it ...
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253 views

Doubt about netbook energy modes

In my control panel there's an energy preferences option. There, I find a "Balanced" energy mode and a "Performance" energy mode. The only differences I detect are the brightness levels and the ...
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1answer
2k views

Changing the Start Menu Power Button - Setting does not work: only (Shut down) is available

This is the second time I've tried to change this setting on a Vista-based operating system and I can't get it to work again. OS: Windows Server 2008 SP2 (not R2) = Microsoft Windows [Version ...
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1answer
135 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 ...
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1answer
211 views

Windows Power Options Clarification

So I was looking through the Windows 7 power options via Control Panel today, and I realized I had a couple of unresolved questions as to the nature of various choices. I was wondering if someone ...
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513 views

Loss of Power Management upon Standby Resume

I've got a Lenovo ThinkPad X220. Occasionally, when returning from sleep, the power management functions will cease to operate. I can't change the brightness of the display, the machine gets ...
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2answers
2k views

How can I turn off external HDD totally (no not safely remove or auto-off)

There IS a solution for this. The problem.. I lost it. It was a ... hdparm? sdparm? smartmontools? I cant recall it. Anyway, it was using a Linux tool (Win port of it) to turn it off, and Unlocker ...
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1k views

Powering-down USB Powered Devices on laptop sleep

I recently purchased a Targus Lap Chill Mat, which is a USB powered device, but doesn't have any interface/storage/etc function. I'd like it to power-down when my (macbook) laptop sleeps (since the ...
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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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How to disable screen shutdown after 1 hour in Fedora 17 (Gnome)?

Fedora 17 doesn't seem to have a "Never" option for the screen timeout setting. Is it possible to disable this power-saving feature? This is for a machine showing a dashboard which should always be ...
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1answer
472 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
3k views

Why doesn't my laptop battery charge while the laptop is in use?

Up until a week ago, my laptop has always been able to charge the battery while I'm using it. Now, it will not charge unless the computer is sleeping, hibernating, or turned off. The icon in the ...