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

4
votes
1answer
548 views

Ubuntu - application-specific power management

I listen to lots of music while doing non-computer related stuff and my laptop falls asleep after 30 mins, as per my power settings, so I have to go back to the laptop to wiggle the mouse every now ...
1
vote
1answer
30 views

How can I make my laptop hibernate/sleep when the charger is removed?

My laptop doesn't have battery. I'm using it with direct power supply. So the problem is that whenever the electricity goes off or when the charger is unplugged, my laptop shuts down and my work is ...
0
votes
0answers
32 views

Setting Closing Lid action via Powercfg command not working

I want to be able have closing the lid do nothing using a batch file. I see this post change lid option and have followed it but closing the lid still puts laptop to sleep. I am using command powercfg ...
0
votes
1answer
275 views

USB devices not waking PC from sleep on windows 8.1

I have a new build based on MSI H97M-g43 motherboard. None of USB devices are able to wake the PC back from S3 sleep. Two methods that do wake up the PC are the power button and wake timers. The usb ...
2
votes
2answers
963 views

How do I make my Geforce GTS 250's power save mode stop causing audio stuttering?

Whenever my GTS 250 enters its power save mode via Powermizer, downscaling its frequencies, my audio stutters. This affects both my onboard audio and my Audigy Soundblaster 2 ZS. Changing Windows ...
0
votes
0answers
29 views

Disable “Turn off Display After…” in Windows 7 Enterprise

Apologies if this query isn't very clear, it's my first time posting. I'm on a laptop as a user on Windows 7 Enterprise. I have full admin rights on my machine and the network but still cannot figure ...
1
vote
1answer
595 views

Effects of Nvidia graphics card aperture change

I have laptop with nvidia 8200M G.In BIOS setting I can adjust the aperture size from 64 MB to 512 MB.This change reflects as increase in the available RAM. Considering that I don't play ANY games as ...
4
votes
1answer
327 views

Why won't PC laptop completely power off after upgrade to Windows 10?

I have recently upgraded from Windows 8.1 to Windows 10 and it appears that it mostly successful. By and large I'm pretty happy with the upgrade however there is now a problem with turning off my ...
2
votes
1answer
3k views

Win XP Screen saver / power management not working

I have a PC running Win XP, and even though I have the power management set to turn off the monitor after 10 minutes, and I have the windows screen saver set up, many times they never kick in. I come ...
2
votes
2answers
703 views

How to run commands when mac is idle and when it resumes

I want to run script when my mac is idle (for example after 5 minutes or screen saver start time is also ok) and when I resume it from idle state. I know that I can write daemon using ...
0
votes
2answers
3k views

How to use MacBook Pro with external monitor / keyboard / mouse while running on battery only?

I'm using my MacBook Pro like a desktop sometimes. But for some reason, when I unplug the Power Supply, it is impossible. The MacBook Pro immediately shuts off. When I turn it on by hitting any key on ...
1
vote
0answers
252 views

Windows 7 on 1st Gen Macbook Pro (Q4-2008), power management problems

I have the first generation macbook pro, purchased Q4 2008. I've been trying to run Windows 7 and can get it all installed great with the BootCamp 3.1 64 bit drivers however ... power management isn't ...
1
vote
0answers
901 views

Effects of enabling DVFS in a CPU

I came up with this energy regulating software called Granola while reading at Ghacks.net I downloaded and installed the software but you need to enable the DVFS function in the CPU. I booted up and ...
0
votes
3answers
1k views

Turn off backlit keyboard when computer goes to sleep

I just bought a backlit keyboard from a not so known brand. It doesnt have any good drivers. My issue is when I put my computer to sleep or even turn it off, all the leds underneath the keys stay on. ...
2
votes
1answer
328 views

Power states in Windows

Does anybody know or have a link to documentation on how the Power Manager of Windows, determines to go to the ACPI power states S1-S4? Are there any settings that can be configured? I know that by ...
0
votes
0answers
9 views

brightness settings gone, how do I take it back?

I have ACER laptop with Windows 8, after I change it to Windows 7, my screen brightness controller are gone (Not in power options). I tried going to the device manager, then I click monitor and it ...
5
votes
0answers
371 views

How can I stop my laptop waking from suspend as the lid is closed?

I have an Alienware M17x with Kubuntu 14.10. When I suspend to RAM and close the lid, very often it will wake up after a few seconds of sleep. Sometimes not. I get the feeling it's related to how ...
2
votes
1answer
2k views

Windows 7/ATI graphics: GPU fan speeds up when display goes into sleep mode

I am using Windows 7 Professional 64-bit with an ATI Radeon HD 4870 video card with latest drivers (Catalyst 12.4). In normal desktop Windows use, the fan of my video card powers down and is so quiet ...
1
vote
1answer
288 views

Why is my monitor turning off after inactivity when power settings tell it not to?

I'm running Windows 8.1 Pro and a Radeon HD 6670 with the latest ATI drivers. I've noticed lately (maybe within the past month or two) that my HDMI out will turn off after not being at the computer ...
1
vote
3answers
6k views

What could be causing windows to fail to sleep or hibernate, and revert system settings?

I am running Windows 8.1 on my system (Dell e6520) and the symptoms are this: My PC won't sleep or hibernate. It the screen turns off, but the fans just run and run, and after a little while, it ...
2
votes
4answers
2k views

Does a cable internet connection remain active during a loss of power in the apartment building?

I live in an apartment building in Czech Republic, Europe. I have a cable internet connection with a static IP connected to an Ubuntu server I set up. Recently out building lost power, though the ...
3
votes
0answers
782 views

Windows 7 won't wake when opening lid

I've got a Samsung Series 5 laptop running Windows 7 SP1 Home Premium, fully patched. It used to wake up from sleep by opening the lid, when I would put it to sleep by closing the lid. Unfortunately ...
1
vote
0answers
390 views

Sempron 3500+ never clocking up (always at 800MHz)

According to CPUID CPU-Z and Windows Vista resource monitor the AMD Sempron 3500+ (1800MHz) in this Packard Bell Easynote SJ51 is never clocking higher than it's lowest speed. It's running at 52C so ...
1
vote
2answers
1k views

Does Laptop's Battery Condition Power When On AC?

I doubt about this, but still want to hear what others think. UPS condition power but does laptop's battery condition power?
5
votes
4answers
1k views

Laptop waking up from sleep because of “power button”? (Windows 8.1)

My computer is brand new but has a serious problem - it wakes up from sleep mode on its own in the middle of the night, usually a couple hours after I put it into sleep mode. This problem is ...
0
votes
1answer
398 views

Which parts can I remove from server to reduce power coonsumption

I have a 4u IBM server for home use and it consumes 480w. It has 4 X Quadcore CPU and 128GB RAM & CD Drive I want to reduce the power consumption so i want to know that if i remove 2 x Xeon ...
0
votes
1answer
50 views

Disable Wi-Fi on GA-F2A88XN-WIFI motherboard?

I'd like to disable the wi-fi hardware (and maybe also bluetooth) on my Gigabyte GA-F2A88XN-WIFI, for power saving purposes. I did not see an option in the BIOS. On the software side, I've already ...
0
votes
1answer
633 views

HDD randomly turns off and then on

I have problem with my SATA HDD - it shutdowns itself from ocassionally, and then almost immediately turns back on again. It's system drive and the only one in my PC. I've disabled turning hdd off in ...
0
votes
0answers
34 views

Laptop power plan keeps going into 'Power Saver' mode

My Dell Vostro laptop keeps switching to Power Save mode whenever its on battery. It happens due to a custom Dell Energy Save mode program. The same can be disabled by killing the program from Task ...
0
votes
2answers
520 views

How to wake a sleeping laptop

I have an old compaq pressario CQ61 that's getting a bit old and I'm trying to convert to a media server. I want to put it by the TV and leave it mostly alone, and manage remotely (via RealVNC). Now ...
0
votes
1answer
513 views

Advanced Power Management in Compaq laptop

I reinstalled Windows XP in my Compaq Presario V2000, and now the "standby" and "hibernate" options are no longer available. I tried scanning for new hardware, to no avail. In Device Manager, there is ...
1
vote
1answer
998 views

HDMI and power saving mode

As documented in this question, I recently bought a new Samsung monitor and connected it to my computer using a HDMI connection; this monitor just doesn't seem to support any power saving mode: it won'...
3
votes
2answers
13k views

Enable Lenovo's “conservation mode” on boot

I have a Lenovo Z50 laptop with Lenovo's Energy Manager installed. Inside the manager's settings menu is an option to enable "conservation mode", which keeps the battery charged in the 40-65% range ...
0
votes
1answer
664 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. ...
13
votes
7answers
51k views

Windows 7 Goes to Sleep in conflict with Power Option Setting

My Del Dimension E521 running Windows 7 puts itself in sleep mode each night -- despite the fact that I have chosen a power option that specifies NEVER Each morning I find the monitor blank and I ...
0
votes
1answer
1k views

Windows 10 changes power management settings

I have a Dell Latitude E5450 running windows 10. I have some problems with my fingerprint reader. Now and then, after a reboot or suspend, the fingerprint reader is not working. Each time when that ...
6
votes
4answers
6k 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 ...
7
votes
4answers
3k 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 ...
0
votes
1answer
29 views

How can we know that our laptop model has capabiliy to protect against overcharging the battery, and is able to set preferences?

How can I know that my laptop model has the ability to protect against overcharging the battery, and whether it has a menu to setup the preferences? Example: this is my model, Lenovo G40 I am ...
0
votes
0answers
258 views

windows 10 restarts after waking from sleep mode

I'm using windows 10 on My asus ROG g750Jw. My lap doesn't wake up from sleep mode.any ideas and fixes much appreciated. I've attached the energy report below Power Efficiency Diagnostics Report ...
1
vote
1answer
2k views

How can I disable a CD drive without any special software?

I have a Lenovo w510 laptop. When it came, its CD drive was powered off; I right-clicked it and enabled power to it. Now I want to power it off again, without using any software. Does anyone know ...
3
votes
3answers
518 views

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 ...
0
votes
0answers
18 views

Lenovo X201 battery management shuts down prematurely

Something is not working with the Lenovo Power Manager software/hardware on my X201T tablet. The computer always shuts down when I am on battery and still have 1.5-2 Hours left of battery life ...
0
votes
0answers
42 views

is it possible to “reset” the counting mechanism of power manager for battery maintenance (Lenovo)

Lenovo thinkpad provides a power manager software that allows for battery gauge reset. It's a hunch but it seems that there is a counting mechanism every time I "perform reset". In early days when I ...
1
vote
1answer
67 views

How to power on ThinkPad T440P from usb keyboard?

How can a ThinkPad T440P be powered on from a USB keyboard? I haven't found any settings in the BIOS for it. I have the keyboard, mouse and 27" monitor with displayport. I use it as a desktop and I ...
0
votes
0answers
103 views

How to have my laptop go to sleep when unplugged while lid shut? (Don't want it to go to sleep when closing lid and plugged in)

I've got a Lenovo Yoga 2 11 running Windows 10. I currently have it set to stay awake when the lid is closed and it is plugged in, and that is working exactly as intended. However, if the lid is ...
0
votes
1answer
85 views

How should you set power management settings in Windows 10?

I've noticed since switching to Windows 10 Professional (clean install) that the power settings seem to be causing some odd issues. I've noticed that even though the system is set to never hibernate ...
8
votes
5answers
25k views

Should I turn off my PC when plug/unplug external display?

Should I turn off my PC when plug/unplug external display? Some people don't do that, but I think this is required to keep safe your equipment. Am I correct in thinking this?
1
vote
0answers
183 views

Computer doesn't shut down, hibernate or sleep

After the Windows 10 upgrade my PC (HP Pavilion 15n-000sq) won't shut down, hibernate or even sleep. Whenever I choose one of these it just goes to a black screen but everything is still running and ...
1
vote
3answers
19k views

My laptop will not sleep when I close the lid

I've tried to look into everything I know of but this has stymied me. I have a Lenovo Thinkpad Edge 15" currently running Windows 7. The laptop will not enter sleep mode when I close the lid. When I ...