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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Screen brightness maxes out automatically when watching videos or playing games

The screen brightness maxes out automatically each time I am wath videos or playing games on my laptop (a Packard Bell EasyNote TSX66HR). What i have done recently: I bought new Samsung Evo SSD ...
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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 ...
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16 views

Overriding “The speed of processor 0 in group 0 is being limited by system firmware”

My Thinkpad automatically locks the CPU frequency to ~1,5Ghz while the adapter is plugged in without a battery, as described in this article. I don't care whether the adapter can support it or not ...
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1answer
35 views

Can the power button of a PC or laptop be remapped?

Forget for a second how bad an idea this would be. But is it possible to remap the power button of a PC or laptop to, say, print some message or anything other than managing the power? If not, why? ...
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0answers
30 views

All USB devices randomly stop working under Windows 8.1

As the title says, this problem (USB devices stop working) happens completely randomly – once a day, 5 times a day, or sometimes not at all. I have searched the event viewer after restarting every ...
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0answers
11 views

Laptop shuts down by closing the lid when plugged, not goes to sleep as it should

I have installed Debian 8.0 Jessie with Gnome on my HP ProBook 430 G2. The weird problem is that when I close the lid while laptop is plugged, it shuts down and does not go to sleep as it does when ...
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1answer
21 views

How can I change the description of a power plan in Windows 8?

I used the powercfg utility within windows to duplicate a power plan that my Samsung SSD software created and I would like to change the description of the new plan.
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4answers
14k views

Docking station power adapter is not recognized by my Dell notebook

At this morning, my laptop (Dell Latitude e6410) gave me this error. I didn't do anything, I didn't change anything. And I got this docking station just 2 month ago. I made a little research on the ...
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0answers
41 views

USB device loses power after 20 seconds Windows 8.1

Alright so I recently started using a Tritton Primer Headset, it worked fine for a day but since then the USB powered baseplate receives power for around 20 seconds then it drops to 0ma. After 20 ...
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1answer
41 views

PC restarts on power outtage despite having a UPS

Unfortunately where I live I do not have 24/7 electricity. My new PC rig which is considered to be a high-end(gaming) system is connected to a brand new APS/UPS that have these specs: DC-AC ...
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2answers
5k 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, it restarts. No blue screen, no hanging program, just ...
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1answer
21 views

How can I make windows reset the power plan to a chosen one after each restart?

After I start my pc every morning I don't want to check what power plan I am using and comfortably start my favorite game without worrying about whether I left a power saving power plan on. It could ...
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1answer
657 views

All USB devices go to sleep in idle mode on Windows 7

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 ...
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6answers
15k views

How to disable power to USB ports when laptop is in sleep mode

I have a Windows7 laptop with two external 2.5" HDDs and a cooling pad connected through USB ports. When I put the laptop to sleep, these devices are still powered on - the fan in the cooling pad is ...
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1answer
19 views

How to prevent hibernation during work hours

I have a laptop at work that I don't want it to hibernate during work hours. It may be running a program that will corrupt the current data if it hibernates. After work, it can hibernate until someone ...
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1answer
5k views

How to disallow USB devices to wake the computer by default in Windows 7

Every time I plug in a new mouse/keyboard or plug an existing one to a new USB port, I have to manually go to the device manager, go to the device's property page, and uncheck "Allow this device to ...
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1answer
29 views

Display won't turn off, Turns black Instead Lenovo ThinkPad W540

In my power setting, my display should turn off after a minute, when this amount of time elapses, the display is still on but showing black screen instead of turning off. How Can I solve this? ...
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2answers
42 views

Can't set Qualcomm Atheros AR9485 card power on laptop under Linux

I've been trying to set the power management on my wireless card. I looked at PowerTOP and I tried setting power management on the wireless card, but it doesn't work. When I tried using the command ...
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1answer
83 views

Linux Mint: Power Management does not turn off displayport monitor

I have two monitors connected to this system... one via displayport and one via DVI. When I go into the screen saver settings, I enabled Power Management and set standby, suspend, and off to 1 minute. ...
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1answer
231 views

Transcend MTS400 SSD crashes my Acer C720 Chromebook, how to disable SATA power management in Chrome OS?

So I upgraded my Acer C720P Chromebook with a larger Transcend MTS400 SSD. However this SSD has a firmware bug, because of which it is incompatible with SATA power management (ALPM). This Transcend ...
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2answers
338 views

Does speedstep and cstate affect user experience?

I have desktop running Windows 7 on Intel i5-750. After taking a look at the bios option I saw the SpeedStep and C-state were disabled. My question is - do they have any negative effects on the user ...
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56 views

Harddrive spinning down though time increased with hdparm

I have an external harddrive connected via USB. The usual method to set the spindown / standby time of harddrives seems to be using hdparm. So I run sudo hdparm -S 200 /dev/sdb and get /dev/sdb: ...
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29 views

How do I prevent an Asus Q301LA laptop from shutting down when I am actually selecting sleep?

I purchased an Asus Q301LA laptop about 9 months ago. It ran Windows 8.1 from the beginning, and worked flawlessly. But about a week ago it began having sleep issues. Whenever I try to put it into ...
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0answers
11 views

Change Energy and Power Usage Settings On Mate Desktop

I tried to change the energy settings on my Mate desktop but I find the GUI app rather poor and it lacks very important settings, such as: A separate setting for the timeout before entering ...
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26 views

Delay sleep/login page when closing laptop lid on Windows?

I want to be able to close my laptop lid, but not have the laptop got to sleep for a set amount of time (e.g. 5 minutes). If I open the laptop in that time, it bring be back to where I was without a ...
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0answers
97 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 ...
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0answers
36 views

My laptop doesn't turn on after properly shutting down

I've been using an HP Pavilion g6-2289x for one and half years. It was working fine so far. One week ago it started behaving quite strangely. When I shut down my laptop after use, and tried to start ...
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1answer
20 views

Is it possile to set time before windows disable device for energy saving purposes?

I have a tablet-pc with Windows 8 and dock keyboard. Windows disables dock keyboard after ~10 seconds of downtime by default. I want to increase that time to 60 seconds at least. Is it possible ...
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2answers
429 views

Computer hibernates when I tell it to sleep

Problem When I tell my computer to sleep, it hibernates instead of sleeping. This occurs regardless of whether I tell it to sleep using the button on my keyboard or using the UI. Interestingly, when ...
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3answers
2k views

How to prevent a Windows 7 PC from sleeping when CPU usage is over X%?

I often leave the PC running into the night to process video files, so it shouldn't sleep while it's working but it would be nice if it went into sleep when it's done. During the export the CPU is ...
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8answers
946 views

What are some good practices for making sure my laptop battery serves its full life?

Basically, I'm looking for some do's and don'ts. Is it bad to keep my laptop plugged in when I'm not using it (majority of the time)? Is it bad to plug it in once I've finished using it (with it ...
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0answers
42 views

Computer crashing when I play games

Specs: Intel Core i7-3930k Corsair H70 CPU Water Cooler 16Gb DDR3 G.Skill 4x4Gb 1600Mh 120Gb Intel 520 Series SSD 2Tb WD Caviar Green WD20EARX SATA 6Gb/s 64mb Cache SATA3 AMD Radeon R9 ...
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1answer
249 views

Can I prevent my Windows laptop from waking up when the lid opens?

My laptop (a Lenovo Thinkpad W530 running Windows 7) regularly wakes from a sleep state in my bag, draining battery and overheating badly (even when I make a point to leave the fans unobstructed by ...
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1answer
28 views

How to wake a linux server when the temperature drops to certain value?

I've been tasked with a weird problem, sending a server into sleep mode when a certain core temperature is reached, and then waking it when it cools back down to a different temperature. I can handle ...
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1answer
52 views

Reduce power usage while computer is “off” [closed]

Recently I bought a device to measure the wattage from devices. To test the apparatus I measured 6 watts from an IKEA LED light bulb which was supposed to produce 6 watt usage and a few laptop ...
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0answers
23 views

Ethernet (but not web) controlled power switch [closed]

It's common to find a "remote power switch" or "web power switch", example http://www.ambery.com/pr2reposwweb.html , which is controlled by a web interface. We need to control a power switch ...
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1answer
57 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 ...
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3answers
7k views

Lenovo tools for windows 7: can't re-enable wireless

Consider a netbook - Lenovo S10e with Windows 7 and the S10 Lenovo power management tools. Machine has factory BIOS. Fn+F5 is the key combo to toggle the wireless radio on/off. The tool allows the ...
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2answers
1k views

Want to throttle CPU on Windows 7 desktop, but it is ignoring Max CPU setting in Power Options

I want to be able to substantially throttle down the CPU on my desktop, which due to space constraints is in our bedroom and the wife is suspending it each night because of the fan noise. I've tried ...
2
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1answer
33 views

How to make server power settings apply even when computer is activated by WOL

I have a computer with 9 hdds as a storage server in the next room for me and my family (movies and such) connected to the router. The computer is without keyboard and monitor, all works fine, but in ...
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1answer
62 views

Samsung monitor not going into power saving mode

I have recently bought a Samsung LT24D390 TV monitor, which I connected to my computer using a HDMI cable; the video card is a GeForce GTX 560 Ti, the O.S. is Windows 7 x64. The monitor works as ...
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1answer
6k 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 ...
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204 views

How to fix Ubuntu 14.04 suspension - abruptly suspends and after manual suspension unsuspends

I had a problem when I closed my lid the desktop did not suspend so I read this post however this did not help so what I did is to rollback now my files looks as attached below. However now I have two ...
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1answer
50 views

UBS 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 ...
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1answer
31 views

Boot computer on bringing it to power

I'm trying to reach following: I have a multi master/slave power point. My computer is plugged in into the master slot. The whole multi power point is plugged in into a radio power point I can ...
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0answers
56 views

Wake on LAN cause computer wake up immediately after shutting down

I've installed Ubuntu on my Dell PC, and i want to use Wake on LAN. But here i encounter a weird problem. The computer will wake up immediately after shutting down. Here is what i've done: The ...
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1answer
586 views

What is the “known hardware incompatibility” that disables PCIe Active State Power Management? How do I fix it?

I'm on Windows 7. I just ran a Power Efficiency Diagnostics Report through powercfg -energy and I got this error: Platform Power Management Capabilities:PCI Express Active-State Power Management ...
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1answer
62 views

Windows 8.1: How to tell power management to ONLY TURN SCREEN OFF when closing the lid?

I was expecting to find another option in my laptops power management when I close the lid, but all I found is those 3 options: Do nothing Sleep Shut down In an old ThinkPad running Windows 2000 ...
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1answer
108 views

Keep dual-monitor settings in Windows 8.1 after closing laptop lid

I've got a Dell XPS 15 laptop connected to a (rather old) Dell 2408WFP monitor via HDMI. I want to use only the monitor when I'm at my desk, so I've set Windows to show the desktop there and switch ...
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1answer
327 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 ...