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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183 views

How can I link a keyboard shortcut to different power plans/profiles in Windows 7?

For example, the different power plans I have available on my Dell e6420 are listed as: How can I link these options w/ a keyboard shortcut, such that I could either a) toggle through them, or b) ...
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0answers
256 views

ASUS M5A97 UEFI BIOS - Where the heck are the C-State settings?

I've been getting coil whine since switching to a new PSU, and I'm worried about power stepping affecting my SSD RAID0 performance, so I did some reading and decided I needed to disable some C-States. ...
2
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1answer
913 views

How to make xscreensaver turn off the backlight only when explicitly locked

Is it possible to set up XScreensaver so that it would turn the LCD backlight off only when I lock the screen by hand? I thought it must be controlled by the "Quick Power-off in Blank Only Mode", but ...
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1answer
9k 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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4answers
950 views

CPU is underclocked on battery (balanced plan)

I have a pretty bad amd e300 cpu. Whenever I am on battery and on balanced plan, cpu-z reports my frequency to be 798 mhz (in all conditions (full load etc)). However, in the processor power ...
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0answers
1k views

Set screensaver/powerdown timeout on Microsoft Surface

When I watch a movie on my Surface RT without the power cable plugged in, after some minutes the screen turns dark (I'm assuming that's the screensaver or some other power saving feature) and the ...
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1answer
6k views

No Hybrid Sleep in Windows 8?

As you can see below, there is no hybrid sleep option like there is in Windows 8. Is it enabled by default with sleep or hibernation or is it gone entirely? <- Windows 8 vs Windows 7 -> Edit: ...
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1answer
189 views

Does a previously sleeping Windows PC automatically resume after power loss?

I have Hybrid sleep active which makes it so the computer sleeps and remains powered on in a low-power state while also creating a hibernation backup file. If I leave my machine in this state and the ...
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1answer
1k views

Wake machine from hibernation remotely

Is there a way to wake a hibernating windows 7 machine remotely either via software or some other solution? I use LogMeIn but have to also hibernate my machine every weekend but want to be able to ...
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0answers
219 views

Laptop freezes when power plans in Intel Graphics and Media Control Panel is set to Maximum Performance

As what is explained in the title - but it only happens when I plugged my laptop in to the charger. My laptop is ASUS N46V and here's the spec: OS Name Microsoft Windows 7 Ultimate Version 6.1.7600 ...
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1answer
340 views

Have the screensaver enable or disable depending on power profile?

I would like to be able to enable and disable the screensaver when I switch power profiles. Say I had 2 profiles, balanced and high performance, I want to have the screensaver show while on balanced ...
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1answer
323 views

Power consumption Bluetooth 4 vs 3.5mm

I'm in my work car a lot and my only option currently for getting music/podcasts to my car speakers is a 3.5mm AUX port on the dash. I was wondering what the power consumption difference between ...
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1answer
188 views

Can I prevent my power saving from activating when XBMC is running but doesn't have focus?

This seems contrary to what most people want, but I've got a somewhat different setup. I have my desktop computer hooked up to my HDTV as a second screen - I don't always have it turned on in that ...
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0answers
4k 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, and restart right after that. No blue screen, no hanging ...
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2answers
2k views

Turning off unused hard drives

I have a PC running Ubuntu 12.10 server as my custom home server. There are a number of hard drives connected to it via USB. The server runs 24-7 and I was wondering if there is any way or any ...
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0answers
46 views

Advanced power options - processor power managment [duplicate]

My cpu has p states at 2.3 ghz, 2.1 ghz, 1.1 ghz, and 800 mhz. In the advanced power options-processor power management. Windows allows you to change the percentage. Does this percentage get "rounded" ...
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0answers
199 views

CPU (?) Clicking Sound During Resource-Intensive Tasks

I just bought a new computer (Lenovo Yoga 13, with integrated graphics and SSD). Whenever I bring it out of sleep, or do something resource-intensive (such as heavy Photoshop work), I hear a scratchy ...
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2answers
992 views

Sound (and possibly other functions) cut out on laptop, but only under specific conditions

I have an odd issue with my new Windows 7 laptop, and I'm at a loss to explain it. I was listening to a podcast downloaded to my hard drive (incidentally a StackExchange podcast) while I did the ...
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1answer
177 views

Need better management of display sleep times in Fedora 17. How to do?

I am using Fedora 17 64bit on an AMD quad core machine. My use is home use with some power user thrown in (spreadsheets, photo editing, music creating). ALL my Television viewing is done by ...
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3answers
4k views

Lenovo laptops: Difference between “Lenovo Dynamic Graphics” and “High Performance”

I recently purchased a Lenovo IdeaPad Y580, and I'm trying to figure out the difference between the different power modes: Power Saver, Balanced, High Performance, and Lenovo Dynamic Graphics. The ...
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0answers
402 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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1answer
201 views

PC won't boot after unplugging power until doing several re-pluggings

After shutting down my PC, I usually unplug the main power cable, but the next time it's plugged my PC won't boot until I unplug and replug it several times (twice or more). Does this happen to be a ...
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1answer
577 views

Power off screen not working in Windows 8

I've searched here and found this for windows 7. Would this be applicable to Windows 8 on a laptop? I would be surprised if we have to fiddle in the BIOs to get a basic function working...? I'm ...
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2answers
437 views

How to tell Windows 7 “sleep when laptop is closed, unless there's an external monitor connected; then use that”?

Most of the time, I would like my Windows 7 laptop to sleep when I close it. But sometimes, I like to connect an external monitor over DVI. I would like my laptop to use the external monitor when I ...
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5answers
38k 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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1answer
469 views

Windows 7 - all usb devices go to sleep im idle mode

A strange thing happened after a few updates to the system: Intel rapid storage SSD firmware update Intel Ethernet adapter update GPU Intel update When the computer turns off the screen (after 5 ...
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2answers
3k views

Do I need a 3 pin to 4 pin adapter for my motherboard fan connectors?

I'm buying new fans for my machine right now, and it seems that everyone prefers using 3-pin fans over 4-pin fans these days. If my motherboard has 4-pin fan connectors, do I need to use all 4 pins or ...
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0answers
168 views

PCI Express device does not initialize properly after extended log off

Ok, so I'm at my wit's end with this one. I work on a system which utilizes a video capture board plugged into the PCI Express bus on a Windows XP SP3 x86 machine. At one specific customer site we ...
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0answers
272 views

Tablet-PC display won't turn off when inactive

My Dell Latitude XT tablet PC display (touchscreen) won't turn off when inactive. The hard drive on this laptop died, so I installed a new hard drive. Both the old and new hard drives use(d) Windows ...
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1answer
1k 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
81 views

Do chargers consume power when plugged but not used? [closed]

Many people leave their chargers for mobile phones, laptops, devices of any kind plugged into the power socket but without the device they are supposed to charge, connected at the other end. When ...
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1answer
1k views

Linux suspend or sleep on lid close

How can Fedora 17 (LXDE spin, if it matters) be configured to sleep or suspend when the lid of a laptop (Lenovo S10 netbook) is closed? With a 'stock' installation (from the LXDE spin live CD), ...
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1answer
791 views

How to script the Windows 7 'sleep' command

To clarify, when I'm talking about 'Sleep' I mean Hybrid Sleep, i.e. save the contents of RAM to the hibernation file and then go in to Standby mode. I have this working perfectly fine via the start ...
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1answer
2k views

Windows 8- sleep mode is drive ON?

Does HDD in Sleep mode under Windows 8 still spins - as it's saves your RAM into HDD? I'm concerned about hdd when carrying laptop around in a bag when it's in sleep mode. Or it is Hibernate which ...
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3answers
4k views

Why hibernate Windows 8? [closed]

It seems to me that in Windows 8 classic, hibernate is slower than the fast shutdown. Is there any meaningful reason to hibernate a Windows 8 machine (as opposed to fast shutdown or sleep)?
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1answer
649 views

How to stop Windows 7 from reducing screen brightness when operating on battery?

Every time I turn the laptop on while not plugged in and working on battery, the screen brightness gets reduced automatically down to about 50-60%. When I plug it in, it remains at that level so I ...
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0answers
78 views

Making Windows 7 ignore the first click/keystroke when screen is off

I find this functionality very convenient in OS X, any way I can get Windows 7 to behave similarly?
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4answers
990 views

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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5answers
7k 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
1k views

Is it possible to automatically put individual monitors to sleep when not in use?

My desktop computer has three displays, and I usually use all of them at once - but not always. In order to save electricity, I would like a way for monitors to automatically go to sleep when not in ...
2
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1answer
211 views

How efficient is Windows 7 in using battery power as compared to Windows XP in similar power plans?

Windows XP didn't have Aero glass and other visual effects and shadow indexing (for fast search) that probably consume extra power in Windows 7. I wonder if disabling some of those features will save ...
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0answers
90 views

Hard disks power down, even when set to “never” in “Power Options”

In Windows XP: A few of my hard disk(s) power down occasionally, even when I have set them to "never" turn off, in the Control Panel's "Power Options", and even saved the new power-theme. What do I ...
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1answer
175 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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1answer
310 views

Samsung LCD 214T gets stuck in power saving mode

I've had this monitor (Samsung 214T) for more than 5 years, and had to replace the capacitors a couple years ago. It still works beautifully, but it's always had a similar problem that when I ...
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1answer
154 views

Setting charging limit on MBP?

Is it possible to tweak settings so that the battery will only charge up to 90% -95% and then use power adapter to run ? A friend told me he was able to set such limits on his non-mac PC so I was ...
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1answer
375 views

Windows 8 randomly powers up pc?

I have installed Windows 8 PRO on my Asus UX31E (Zenbook) and sometimes happens that after I leave it charging after powering it off, I found it powered up (actually I found it in sleep mode because ...
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1answer
1k views

How can I tell if my computer went to sleep?

I'm trying to work out if my computer has actually fallen asleep, I have set it to fall asleep, but it restarts so quickly, I cannot tell if it was actually having zzzzs or not. What logs are there ...
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2answers
763 views

Leaving the charger in the laptop after it is fully charged [duplicate]

Possible Duplicate: Should laptops remain plugged in when their battery is 100% charged? Is there any problem if I left the charger connected to the laptop after full charging? And if there ...
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4answers
5k views

Does a computer screen consume more power to display black or white? [duplicate]

Possible Duplicate: Does it save battery to have your desktop background set on a dark color? Is there considerable energy saving using a black background on my website? My VAIO advised ...
4
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1answer
99 views

Is it more cost efficient to keep my computer on and allow it to go into S4/Hibernate? [closed]

I have a desktop PC and and it goes into S4/Hibernate after about 1/2 hour of it being on. Is it wasting electricity by turning it on and off and not just keep it on overnight in S4/Hibernate?