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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345 views

Do ULV Core i5 CPUs consume same power as i7 CPUs if they use same TDP?

Title says it all really: If you have a Core i5 CPU and its TDP is 17W and there is a Core i7 CPU which also has TDP 17W, will they consume the same battery power even though one runs faster? I am ...
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1answer
376 views

How do I detect Windows turning on/off display (going to away mode)?

I'm trying to find a way to detect when my computer decides I've been away (no user input) long enough to turn off the display. That also means I'm not watching movies and the OS is not prohibited ...
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1answer
2k views

disabling power save option on wifi device

I use usb wifi dongles that have AR9271 chipset and use compat driver 3.9.1 - ath9k_htc. I use the wifi units to create an ad-hoc wlan. When there is no communication for a while, the nodes leave ...
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3answers
3k views

Modify “plans shown on the battery meter”

I always use Power Saver or High Performance. No in between for me. How can I rearrange the plans so that those are the two in the top section?
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2answers
57 views

How to Lower Power Consumption while still running tasks? [closed]

On my pc, I have Norton 360 installed. Since it takes up lots of resources, I usually just leave it on while I let it scan my computer, but I'm starting to think it takes up a lot of power. Is there ...
0
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1answer
43 views

Dynamic Power Usage

This is more of a theoretical question, but if it is actually possible, I'd definitely like to look into implementing it. Basically, I'd like to have my computer (Core 2 Quad Q6600, Nvidia 8800 GT ...
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1answer
1k views

Windows 8 on Surface Pro goes to sleep on lock screen despite “High Performance” power settings

On a Windows 8-enabled Microsoft Surface Pro I have a "High Performance" power mode selected. When the device is locked via Win + L it still goes to sleep after a minute or so. Screen saver is ...
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0answers
45 views

Can I prevent Windows 7 from restoring my brightess setting when the power state changes?

I have a question regarding Windows 7. I have set different values for the screen brightness when on battery and when on AC power (in the power plan settings). If I manually change the brightness of ...
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0answers
451 views

Battery alarms and notifications don't work in Windows 8

It's about some months that I have a strange problem with my laptop battery. In the past, whenever my laptop went about 10% of battery, my operating system Windows 8 showed a notification alarm to ...
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5answers
7k views

My Windows 8 PC wakes up every night around 3 am

I just built a new Windows 8 PC, and started using it a few days ago. Every night, I use Hibernate on the computer before I go to bed. The only way to turn it back on is to hit the Power button. ...
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3answers
1k views

What is the difference between an USB hub with external power and without?

I have a 7-port USB 2.0 hub (this) which comes with external power supply in its packaging. However, when I connected a lot of USB sound cards (Creative SB X-Fi Go Pro! or ASUS Xonar U3) to the hub I ...
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1answer
39 views

Mac OS X sleep mode

I am a new Mac user. I need to return to the MacBook continuously with varying amounts of time in between. However, the Mac goes into sleep mode breaking the tasks it was doing. I have figured out ...
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1answer
511 views

is it possible to wake up a Linux device at a specific time

I run Debian on an embedded board. I would like to suspend or hibernate the board say at 10 pm and wake it up at 7 am. There is no problem to suspend/hibernate the board by pmi action ...
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0answers
555 views

windows 7 professional desktop goes to sleep even after setting sleep to “never”

Dell desktop goes to sleep and prevents my being able to log me in even after I set the power settings to never sleep mode. I have checked whether its hibernating and it is not. Wonder what other ...
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2answers
449 views

How do you make the computer locked when the monitor is turned off but power not off in Windows Vista?

I have a power management setting (set up through the Control Panel) that turns the monitor off after 5 minutes of idling but keeps the power on all time, if the laptop is connected to power. Under ...
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1answer
1k 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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1answer
277 views

Low framerate on background apps

My problem is that when a game is running in the foreground, in Full Screen mode, any applications on my second monitor (such as youtube videos, videos, not app specific) drop their frame-rate to ...
6
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4answers
3k views

Close lid option “Do nothing” absent

I just unpacked my new Sony Vaio, with windows 8 pro installed. Everything is nice, so I tried setting my power management options. The "When I close the lid" option only list: Hibernate Sleep ...
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0answers
82 views

On ubuntu 12.04 the video, after some day of working, turn blank

I have a PC with ubuntu 12.04 which is connected to a video with a resolution of 1366x768, without mouse and keyboard. It happened that after some days of work , without any external input, but only ...
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0answers
88 views

Windows should display warning when on battery

I have purchased my first laptop recently. But, the problem is many times I forgot to connect it to power supply. Due, to which all of my battery get exhausted and I get warning when it is only 10% ...
0
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2answers
680 views

How do I tell if my computer supports hibernation?

In Windows Vista, there is regular Hibernation as well as a Hybrid Sleep mode. These features can be found and enabled in the Power Options dialog (advanced settings). For some reason, I don't have ...
0
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1answer
177 views

How does a computer crash while powered off?

When I put my desktop computer in sleep mode I can simply wake it up by pressing a button on the keyboard. Easy! But whenever there's a power outage the computer needs to do a complete boot up to ...
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1answer
421 views

What are the recommended power settings for VMs?

What power options should be changed in Windows when it is running on a virtual machine? We are using VMWare and the possible OS's are any of several still-supported versions of Windows. For example ...
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0answers
59 views

Linux : governer set to userspace in kernel but is always set to ondemand after the system's booted

I am using the 3.2 Linux kernel on a custom ARM board with Debian Wheezy. My kernel config. for power management is below. I want the system to default to the userspace governer (which the kernel ...
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1answer
2k views

Can I power up a Mac with a keyboard shortcut?

I have a Mac Mini 2011 with Mac OS X X 10.7.5 and I want to power it on with a keyboard combination when it is off. When the Mac is in sleep mode, you can just press a key or move the mouse to ...
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1answer
282 views

Closing the lid of laptop slows down downloading files [duplicate]

I would like to download files from the intelernet on my lenovo laptop with windows 7 when the lid is closed. Unfortunately the download slows down almost to zero when the lid is closed. Answers to ...
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0answers
177 views

How to create power profile with power.cfg in Windows 7

My power managment profiles has vaporized I cannot edit them, delete or make new ones cause every new one is copy of the existing which is corrupted. I found out that there is tool called power.cfg ...
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1answer
726 views

How to find different Intel processor's P-states?

Different p-states will let processor core work at different frequency level and voltage level. It's enabled by Intel Enhanced Speedstep technology. I want to do some power management research. ...
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0answers
239 views

How to prevent “lock” on screen power-off in Windows 8

If my screen turns off due to power saving settings in Windows 8 the PC gets locked also. Is there a way to delay the locking another minute? I have no screen saver set (where the lock setting would ...
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2answers
498 views

Does running a dual-core processor with one core disabled reduce power consumption?

I have a Core 2 Duo laptop, and I want to extend my battery life as long as possible. If one was to use an uniprocessor kernel, the second core should not be 'booted' for use by the OS (for lack of ...
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1answer
899 views

powercfg /devicedisablewake gives invalid parameters error

I've trying to solve a problem like the one described in Laptop starts up by itself after being in Hibernate but unfortunately the common suggestion of using powercfg to disable the LAN adapter from ...
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0answers
56 views

Manually checking/changing power state of Intel Centrino wireless in Windows

Windows gives a couple options to manage the power of Intel's mobile Centrino wireless card line in the Advanced Power options menu. Does anybody know of a way to manually (ie, not using Windows' ...
0
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1answer
334 views

How to poweroff CD drive in Windows 7 [duplicate]

I am running Windows 7 64 bit on Lenovo W510, I wish to poweroff the CD drive. The power manager sometimes switches off the power when I am running on batteries. Is there a way I can do that myself. ...
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1answer
540 views

Power management in Solaris 11 using poweradm?

In Oracle Solaris 11.1, pmconfig had completely vanished, and poweradm is available instead. While pmconfig was still available, I used to... Auto suspend : Let my server suspend from 2 AM through 7 ...
0
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2answers
337 views

How can I get my Windows 8 PC monitor to power off like a phone?

Here is what I would like to happen (and what I mean by "like a phone"): I use my PC I stop input to the PC (therefore "idle") Some time passes (say 3 minutes) There is an indicator that the monitor ...
0
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1answer
2k views

ASUS N56VZ-S4209P Screen saver, Screen dimming,sleep/hibernation mode not working according to power management settings

I have a problem with my ASUS N56VZ-S4209P(Win8, I7-3630QM) laptop. If I use the fn+f7 command to turn off the screen it turns on by itself after a few seconds (the time varies between 1-10 seconds). ...
0
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1answer
110 views

Poweredge 2500 6C822 PDM Board Pinouts?

Okay, here's a strange one: I am trying to use an old Poweredge 2500 chassis to house a newer ATX-type motherboard. What I need to know is this: What are the pinouts for the 6C822 Power ...
0
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2answers
92 views

Are modern GPUs good at saving power when low-loaded?

What if I buy a super-duper-computer with 2 or more top-grade nVidia/ATi GPU boards and will mostly (above 80% of time) use it for simple browsing/office/coding tasks, will it consume a lot of power ...
0
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1answer
97 views

Pmset multiple repeating schedule pairs

Can the pmset bash command be used with more than one repeating action pair? For example: Wake or Power on at 13:00, Sleep at 17:00 and Wake at 18:00, Shutdown at 20:00 If not, is there an ...
0
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1answer
50 views

Server Power Management

I am making a single ssh server, and unfortunately, my area suffers from frequent weather-related power outages. This is going to be a bit of a problem if I want to have a server running unless: a) I ...
7
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1answer
7k views

How does windows “limit” the CPU (Power Options / Battery saving)

Can anyone explain how Windows effectively limits the CPU? Last time I tried some tricks to let my laptop not overheat, so I tried limiting the CPU to 70%. As for my suprise it stopped my laptop ...
0
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0answers
18 views

Windows 8 Notebook doesn't stay awake, unable to turn off Sleep Mode [duplicate]

I have an ASUS Pro64JQ notebook, running Windows 8 Pro (64-bit). Recently I noticed that it automatically goes to sleep mode after 5 minutes, even when I turn sleep mode off in the power management ...
1
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2answers
6k 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 ...
1
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2answers
620 views

Where are changes made by the PWRCFG.EXE command line utility stored?

Specifically in regards to the below part of another answer, is there somewhere I can manually set/edit what this utility is doing? Powercfg Command-Line Options In the command line you can type ...
2
votes
0answers
21 views

Let any exe prevent system sleep/hibernation in windows [duplicate]

Is there a way to have Windows system standby prevented in the event that a particular executable is still running? I know playing videos does this semi-automatically but I'd like to apply this ...
1
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1answer
638 views

Reduce WiFi power usage

I found that WiFi is draining too much battery power on my laptop. The system has Linux Mint 14 (32 bit) and runs with its default kernel, 3.5.0-17-generic. The driver in use is ath9k and runs on ...
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1answer
869 views

System cooling policy option is missing

I just bought a new Laptop (Sony SVT1311). The fan is always running and I would like to change some options to make it quieter. I know that Windows 7 has an option System cooling policy but I can't ...
0
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1answer
285 views

Computer hangs when resuming from sleep

My laptop (HP Pavilion g7-1075dx Fedora 17 64-bit) does not resume after I put it to sleep, about every third time. I can put it to sleep and wake it up two times or so, and the next time I try it, ...
0
votes
1answer
812 views

Why does my windows 7 go to sleep after two minutes regardless of power management settings? [duplicate]

My computer goes to sleep two minutes after being idle. I have checked power management options for unplugged and plugged settings and going to sleep, screen saver etc. are all put on never but it ...
4
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2answers
6k views

What do different values of hard drive's Advanced Power Management feature (hdparm -B) affect, except spin-down?

hdparm's -B parameter is documented as: Get/set Advanced Power Management feature, if the drive supports it. A low value means aggressive power management and a high value means better per‐ ...