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 create power profile with power.cfg in widnows 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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67 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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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
84 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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28 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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20 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' ...
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1answer
31 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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61 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 ...
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81 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 ...
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29 views
Wake on LAN stopped working - why?
Wake on LAN stopped working for me, without any configuration change I remember.
Based on what I remember, when I shut down my laptop when WOL still worked, the LAN-Port's indicator LED stayed on ...
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140 views
WDC Green WD20EZRX IntelliPark and number of platters [closed]
Is there a reliable way to tell by looking at drive serial number other codes to determine whether this drive (2TB version, WD20EZRX) has 2 x 1TB platters instead of 3 x 667GB platters? I would ...
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175 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). ...
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ASUS x54hr Radeon HD 7470m Can't set powerstate with aticonfig --list-powerstates [closed]
mnrl@mnrl-K54HR:~$ aticonfig --list-powerstates
aticonfig: unrecognized option '--list-powerstates'
aticonfig: parsing the command-line failed.
I can use powerplay in amdcccle but i need to control ...
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1answer
45 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 ...
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2answers
34 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 ...
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35 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 ...
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1answer
34 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 ...
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Windows 7 - Laptop Sleep when removed from Docking station
I have lenovov T420 laptop (Windows 7), and use Docking station with Display , KB and Mouse connected to Docking station. Generally I Keep Laptop closed and use only the extended display.
When ...
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230 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 ...
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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 ...
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2answers
196 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 ...
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2answers
77 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
...
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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 ...
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how to avoid Centos wifi network from going to sleep
I've installed Centos 6.3 on a home computer to act as a server to do use for tests, git and so on.
The server doesn't have access to a UTP connection so I've set it up to connect to my wifi network ...
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1answer
146 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
147 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 ...
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1answer
43 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, ...
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1answer
119 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 ...
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2answers
346 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‐
...
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1answer
83 views
Why do I keep blowing my PSU?
Yesterday I blew two PSU's on my machine. It's a Corsair box, and the first PSU was high spec (Antec 750W Gamer). The second was just a bog standard PSU.
Both blew in the same power point. I have a ...
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1answer
63 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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125 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.
...
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1answer
93 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
235 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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106 views
opensuse 12.2 64 bit on i5-2410M laptop; can't use fancontrol, sensors-detect won't find it
The fan speed increases and decreases with temperature, but it's always on (even on battery, at temperatures as low as 39ºC).
Because of this I looked up how to have fan speed control under linux, ...
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3answers
200 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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192 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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1k 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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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
70 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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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
77 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
83 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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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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434 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
173 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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1answer
31 views
Does Windows drain more battery power when patched? [closed]
I've just reinstalled my windows 7 and noticed that the battery consumption is much lower. I already have installed all software that runs on startup. I also tend to keep my pc clean so I'm now ...
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44 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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102 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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122 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 ...
