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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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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How can I tell Windows or Linux to put a specific (PCI[e]) device into sleep/off (D3) state?

How can I tell Windows or Linux to power a specific device (e.g. USB controller, network card, video card) down, that is put it in the D3 state? From the very little I know about ACPI and such, the ...
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How to prevent a Windows 7 PC from sleeping when CPU usage is over X%?

I often leave the PC running into the night to process video files, so it shouldn't sleep while it's working but it would be nice if it went into sleep when it's done. During the export the CPU is ...
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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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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 ...
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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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813 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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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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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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4answers
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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 ...
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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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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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170 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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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
947 views

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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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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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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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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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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Windows software to show computer's energy usage or battery discharge rate

Is there any software for Windows 7 which can show a computer's energy usage in real-time? I am currently using Battery Bar, which gives an estimated discharge rate, but this is essentially an average ...
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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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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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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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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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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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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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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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831 views

Using different SSDs types (not only SATA based) as system drive

Currently I have a Thinkpad X61s and want to make it both a bit faster and a bit more power efficient. For that reason I thought that adding SSD drive would make most sense. Unfortunately, because of ...
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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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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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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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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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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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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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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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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 ...
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Does temporarily suspending an idle chip reduce its lifetime?

Nowadays many chips, especially CPUs for portable devices can decrease the clock speed or even suspend for short periods of time to save power. This is great. Now when a chip reduces power ...
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611 views

Why won't the monitor go to sleep?

I have a Windows XP Tablet Edition running on an HP laptop. The laptop is always plugged in. I've set it up for the monitor to turn off after 10 minutes. Sometimes it works, sometimes it does not. ...
3
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782 views

Difference between suspend to “mem” and pm-suspend

What is the difference between echo "mem" > /sys/power/state and pm-suspend Both can put the computer to sleep mode. I want to execute a script automatically when the system resumes from ...
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(Touch Tablet PC ) Minimising LCD power consumption?

Would using black background and light foreground reduce the LCD power consumption? Or actually increases it? Please note, it is not only the power consumption used for luminocity of LCD that needs to ...
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laptop won't wakeup on mouse move, must open lid

I have a dell e6410 running Windows 7. I have a docking station with 2 displays plus a USB video display. My power settings are to turn off the display after 30min but never to hibernate or sleep. ...
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build a Linux server with “server” or “desktop” hardware?

I am Looking to build a Linux home server box from the ground up for my family and I. Id like the server to support file sharing, media streaming, print, virtualization, and remote desktop services. I ...
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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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Windows 7 PC no longers goes into power saving mode

Recently, my computer stopped honoring the power saving settings. It stays on all the time, even though I have it set to go into sleep mode after 20 minutes of inactivity. It used to work as ...
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Disable Power Management in Fedora 12

How to disable the power management in fedora 12, so that lcd/monitor should not go to sleep/off when system is idle?
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How do I get my laptop's screen brightness settings back?

From when I bought it up until yesterday, my laptop would dim the screen automatically if you let it sit for long enough, and then if you hit a key or moved the mouse, the brightness would jump back ...
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Off vs standby. Which is better for an office laser printer?

At an office where I work, there is a Samsung CLP-310 laser printer: The staff turn this off every evening. Right off -using the hard power switch on the back. They are trying to reduce their ...