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.

learn more… | top users | synonyms

0
votes
1answer
183 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. ...
1
vote
1answer
390 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
votes
2answers
293 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
votes
1answer
1k 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
votes
1answer
92 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
votes
2answers
84 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
votes
1answer
73 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
votes
1answer
48 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 ...
6
votes
1answer
4k 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
votes
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
vote
2answers
3k 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
vote
2answers
401 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
vote
1answer
497 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 ...
1
vote
1answer
609 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
votes
1answer
203 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
596 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
votes
2answers
3k 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‐ ...
1
vote
1answer
167 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 ...
1
vote
1answer
132 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) ...
1
vote
0answers
216 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
votes
1answer
630 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 ...
2
votes
1answer
6k 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 ...
0
votes
3answers
657 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 ...
0
votes
0answers
952 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 ...
5
votes
1answer
4k 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: ...
1
vote
1answer
159 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 ...
1
vote
1answer
602 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 ...
0
votes
0answers
190 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 ...
0
votes
1answer
267 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 ...
2
votes
1answer
171 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 ...
1
vote
1answer
145 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 ...
0
votes
0answers
2k 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 ...
0
votes
2answers
870 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 ...
0
votes
0answers
45 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" ...
2
votes
0answers
184 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 ...
1
vote
2answers
568 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 ...
2
votes
1answer
149 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 ...
4
votes
3answers
3k 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 ...
1
vote
0answers
338 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 ...
0
votes
1answer
180 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 ...
0
votes
1answer
453 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 ...
6
votes
1answer
240 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 ...
10
votes
3answers
25k 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 ...
0
votes
1answer
329 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 ...
1
vote
2answers
2k 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 ...
0
votes
0answers
146 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 ...
2
votes
0answers
244 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 ...
-1
votes
1answer
715 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 ...
2
votes
2answers
72 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 ...