Tagged Questions

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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2
votes
1answer
406 views

Force a program to consume at most x% of CPU time [duplicate]

Is there a way to force a specific program to use less than 100% processor time even when the CPU would be idle otherwise? Using process priority, we can adjust how much resources a given program ...
0
votes
1answer
794 views

Linux Mint 16 on HP Pavilion dv6 laptop - power management doesn't work

I installed Linux Mint 16 on my HP Pavilion dv6 laptop. On Linux, my laptop always seems to be under load (fan spins at full speed etc.) Is there any power management tool / driver that could help ...
0
votes
0answers
403 views

are APM levels (hdparm -B) and spin-down time (hdparm -S) different?

The man page referenced in this answer indicates that hdparm -S sets the spin-down time, while -B sets the APM level, and also suggests that -B is a hardware thing (implying -S is software?) However, ...
0
votes
2answers
160 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
0answers
84 views

win 8.1 can't sleep automatically after hibernating

There have been many post online about win 8.1 not entering sleep mode, my problem however only happens after I wake the device from hibernation (data saved to memory, power off). laptop: Asus eee PC ...
3
votes
2answers
5k views

How to disable Connected Standby in Windows 8?

I have a tablet that runs Windows 8 Pro. Microsoft came up with a new power mode that they call Connected Standby, in which evidently all non-Metro apps are suspended when the tablet is put in a lower ...
0
votes
0answers
179 views

HP 2000-bf69WM doesn't wake from sleep after downgrading to Windows 7

I have an HP 2000-bf69WM laptop that originally shipped with Windows 8. I have since downgraded it to Windows 7 Ultimate x64 SP1. I have installed all the drivers from HP's website for the laptop, ...
0
votes
1answer
77 views

Why is my computer constantly resuming from sleep?

My recently reformatted Windows 8.1 machine keeps resuming from sleep. This is an acute issue ever since I got my SSD (the reason for the reformat), as Hybrid Sleep is out and the system does true ...
0
votes
0answers
85 views

Games hang in “Balanced Power” mode

My PC specs: AMD FX-8320 @ 3.7 GHz (stock cooler), 8GB 1866 MHz RAM, XFX R9 280X (OC'd @ 1.25v), ASUS M5A97 R2.0, Corsair TX750. While playing games like Dead Space 3 and BF4 and other ...
0
votes
0answers
129 views

Sleep hard disk after X minutes of idle

I want to make two drives sleep after 15 minutes of idle (sdb and sdc) on Linux Arch. I have the idea that hdparm should be able to help me. I can put the disks into standby (hard disk spins down, ...
2
votes
1answer
32 views

Close programs when on battery

Is there a Windows application or a script that kills programs when my laptop in not plugged in (and preferably relaunches them when charging)? I have a few background applications that use too much ...
2
votes
2answers
1k views

Change Behavior of Linux Power Button

I have a headless linux mint machine that I use for a file server and other things. It's been working great for me for a few years, but there's one issue - my cat likes to hang out on top of it, and ...
0
votes
0answers
64 views

Disable 2 cores to meet 95w TDP

I have a Phenom II X4 965 BE CPU on a M5A78L-M LX/BR motherboard. The motherboard supports processors of maximum 95W TDP. The CPU is 125W TDP. So I disabled 2 cores of the CPU trying to avoid the ...
0
votes
1answer
597 views

OpenSuse 12.3 gpu fan speed

I won't go into the details of what I tried and simply explain what I want. graphics card: AMD HD 4870 So I'm usually working with Windows 7 and my gpu is at 54C with 30% fan speed when idle. Now I ...
0
votes
1answer
78 views

How to know which /proc file is used to set the backlight?

How to know which /proc file is used to set the backlight ? $ ls -1F /proc/acpi/ returns : ac_adapter/ battery/ button/ event wakeup xbacklight works. I use awesomeWM with Ubuntu 12.04, on a dell ...
1
vote
1answer
2k views

Something's turning off my hard drive

I have an Acer Aspire V3-771G laptop With Intel chipset and NVidia 650M Graphics, running Windows 8.1 pro. The laptop has 2 hard drive slots. A few weeks ago I installed an SSD in my laptop. I ...
0
votes
1answer
323 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 ...
1
vote
1answer
130 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 ...
0
votes
2answers
93 views

Win8 on laptop: lid turns off only the monitor

I have an Asus S400CA with Win8. When I'm home I access it with VNC. I'm trying to config its power settings so that, when it's plugged on AC, when I lid close it, only monitor is turned off and ...
1
vote
0answers
823 views

Wake-on-LAN stops working after a few hours

I have a Linux server (Ubuntu 12.04.03) which serves as the internet gateway for our LAN of about 15 PCs. That is, eth0 on the Linux server is the Internet, and eth1 plugs into an unmanaged switch (a ...
1
vote
0answers
59 views

Why deleting a file in windows re-spin / wake up / power up all the hard drives?

If I delete a file on HD 1, and HD 2 is sleeping (power down), windows spins it up for some reason. I'm using the regular recyle bin. Turning off the recycle bin for all partitions on HD 2 won't help ...
1
vote
1answer
3k views

Ubuntu 13.10 has no Suspend or Hibernate Options

I have a Lenova Yoga 2 Pro, and I have Ubuntu 13.10 installed. I am having some issues setting the power functions. At the moment I can not suspend or hibernate the laptop. So from Gnome 3.10 I have ...
1
vote
1answer
92 views

Laptop will not power from battery

I have an Acer Aspire 7551G that will not power from battery, the AC adapter must be connected for the machine to boot and as soon as the adapter is removed the laptop instantly dies. The contacts ...
0
votes
0answers
35 views

Ubuntu: Do not show display state when resuming from hibernation

I'm using Ubuntu 13.10 saucy on my laptop. The device is set up to suspend when the lid is closed, prompting for the password when resuming. However, when I resume, the last state of the display ...
0
votes
1answer
567 views

Wake-on-lan from S5 and prevent network card from turning off

I'm tired googling and looking through hundreds of forums, please help. OS: Windows 7 64-bit Motherboard: ASUS M4A77T/USB3 Onboard network card: Realtek® 8112L The problem is that network card keeps ...
1
vote
1answer
45 views

Is an event registered when a monitor comes out of Power Saving Mode?

I am using task scheduler to fire a program when someone logs in, unlocks the station, and I would like to do it when the screen turns back on prior to locking. IE the power savings turns off the ...
4
votes
1answer
1k views

Disabling AppNap for Terminal

How do I disable AppNap for Terminal? Get Info on Terminal does not have Prevent App Nap check box An alternative is to turn the NSAppSleepDisabled flag on, but will it actually work? $ defaults ...
0
votes
0answers
88 views

How to force Windows Battery/Power notifications to display over RDP sessions

I have fast machine with SSDs and when the low battery notification for 10% etc pops up, I don't always see it if I'm working in a full screen RDP Session. I've set my PC to hibernate on low battery, ...
0
votes
2answers
377 views

Windows won't sleep

My Windows 8.1 PC suddenly decided it no longer wants to go to sleep. If I explicitly put it to sleep then it stays in sleep mode, but it doesn't obey the power plan setting to go to sleep after 30 ...
0
votes
1answer
704 views

turning display off while playing video file in vlc player

Does there is any option or settings (native to vlc player or windows) to automatically turn off the display when playing a video in it.. Could be handy when want to listen only to audio and making ...
0
votes
0answers
79 views

Closing the lid of my notebook doesn't have any effect

When I close the lid on my Samsung 900x3c-A01 nothing happens, both on Windows and Linux... I've made double-sure all the OS' settings are correct, I even tried to set them up so they would shut down ...
0
votes
0answers
115 views

Reducing CPU load to absolute minimum

I have had a couple of things gone missing I believe stolen in my shared apartment and want to run my laptop constantly with a webcam attached, running webcam surveillance software to record/ take ...
2
votes
2answers
450 views

How to limit my CPU power programmatically on Windows 7?

Whenever I run a CPU-heavy activity (like compressing a big set of files into an archive for example) my CPU switches to its full throttle (maximum frequency) and shuts down of overheat in less than a ...
-1
votes
1answer
1k views

really disable power save in linux wifi

I've got a laptop with an Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34) (using iwlwifi kernel module). Although power_save (a module parameter) is disabled, I can see 802.11 ...
1
vote
0answers
76 views

Disable screen power save mode when external monitor connected

I have a laptop with a HDMI connector (NVidia gfx), is it possible to stop the screen from going into power save mode only when I have something connected to the HDMI connector?
-2
votes
1answer
69 views

How effective is to blacklist GPU to avoid power consumption? [closed]

I blacklisted my NVIDIA graphic card by putting it in /etc/modprobe.d/blacklist.conf, I would like to know how it reduces my power consumption
0
votes
2answers
293 views

On windows, how to force application close upon going to sleep

Is there a scripting possibility or application, free or commercially avaible, that would allow me to set up windows to close a partuicular application before it goes to sleep mode?
0
votes
2answers
2k views

Underclocking Haswell for power saving

I have been reading up on Intel's new Haswell processors, and it seems that the K-series is designed for overclocking. But what if I want to underclock? Do I still need to buy a K-series processor? ...
1
vote
1answer
852 views

powercfg.exe not working properly

os:Windows 8 pro x64 build 9200 (fully updated) I want to change the closing lid function through command line with powercfg.exe, so I gathered the required GUIDs and executed the following command: ...
-1
votes
1answer
40 views

manage hardware power supply

How can I manage power supply? (if it's possible of course). Since my charger doesn't supply the needed energy, I need to reduce/remove power from some devices in order to let my processor run full ...
0
votes
1answer
4k 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 ...
1
vote
1answer
569 views

extract power plans from saved registry

I need to restore Windows 7 power plans. I saved full registry on an old PC (also Windows 7), that PC is not available any more. How can I extract power plans from the saved registry?
1
vote
1answer
234 views

Power scheme not applying in Group Policy

I've created a new GPO and created a power scheme under computer configuration. I've disabled the User configuration part of this GPO. In this power scheme I have the action selected to create a new ...
1
vote
2answers
434 views

Low processor performance after removing and then plugging the power cord

It's really confusing. When plugged in, everything is lagging. On battery everything goes smooth, three times as fast. I looked into power options, set everything to default and tried the three ...
3
votes
1answer
1k views

Off vs standby. Which is better for an office laser printer?

At an office where I work, there is a Samsung CLP-310 laser printer: The staff turn this off every evening. Right off -using the hard power switch on the back. They are trying to reduce their ...
1
vote
1answer
60 views

PC turns off abruptly [closed]

I had to press my PC's power button for about 60 to 90 seconds to turn it on. After it boots it works for about one hour. After this hour the monitor goes blank. Power and hard disk LEDs are ok with ...
1
vote
2answers
326 views

Is it safe to add or remove any type of device while in sleep mode?

Is it safe to add (plug in) or remove (unplug) any device while Windows is in sleep (a.k.a. standby, a.k.a. suspend) mode? What type of devices can be added or removed in this manner? Can you do this ...
2
votes
0answers
45 views

Is it possible to use IGP and Dedicated graphics like nvidia's optimus? [duplicate]

Pretty much like the title says. I'm curious if it would be possible to use my dedicated graphics card for gaming and other intensive tasks, while using my IGP for general usage to get power usage ...
2
votes
2answers
2k views

Execute a command if Linux is idle for 5 minutes

I would like to execute a command such as notify-send 'a' if my Linux machine has been idle for 5 minutes. By idle, I mean the same thing a screen saver that gets activated would use to define ...
0
votes
1answer
136 views

How can I view events that cause laptop screen to turn on from standby (but not sleep)?

On a Windows 7 laptop, is there a way to see exactly what device or process triggered the screen to turn on? I'm referring to the "screen off" mode where the notebook is still on, but the screen has ...