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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741 views

No power save on external hard drive - How to implement?

I recently bought a new 3.5" USB external hard drive which I thought had a power save feature on it, but it turns out that it doesn't. So whether it's being used or not, it spins, which wouldn't be a ...
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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
83 views

Script to put Windows 8 to sleep and wake up in 5 seconds

How can I put Windows 8 to sleep(standby) and then wake up in 5 seconds? I know I can use psshutdown -d to sleep, but then how can it wake up on a timer?
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227 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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0answers
298 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 ...
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81 views

Making Windows 7 ignore the first click/keystroke when screen is off

I find this functionality very convenient in OS X, any way I can get Windows 7 to behave similarly?
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897 views

Dynamically disabling cores in a power-efficient way?

I am looking for a mechanism to dynamically disable cores in Linux in order to minimize power consumption. Unfortunately, disabling cores using the following simple approach actually increases power, ...
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0answers
2k views

How to force laptop mode on/off

root@vi-notebook:/home/vi# laptop_mode start force Laptop mode enabled, not active How to start laptop mode? It starts successfully when AC adapter is removed, but not by explicit command. The ...
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8 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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39 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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41 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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54 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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22 views

Windows Vista computer won't power on when connected to router

In all of my years of supporting PCs, I have never seen this. Here's hoping y'all have an idea. My client has a home PC running Windows Vista (long story as to why he hasn't upgraded). He has a ...
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9 views

How to perform certain tasks when switching from/to Power Saver mode in Windows 8? (Disable services etc)

How can I disable certain services and terminate certain programs automaticly when I let my laptop go into power saver? And then automaticly restore them when I go to "performance" mode again? If ...
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228 views

Avoiding sleep when lid is close and no one is logged in

I've an old Dell Latitude laptop that I've converted to CentOS 6.5. As this is going to work like a server (i.e. no one will use it directly) I've changed from UI the power management option to ignore ...
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38 views

minimum allowable CPU speed

How can I determine the minimum allowable speed for my CPU to run the computer. Having the option to reduce the CPU to 0 is not logic nor allowable in Win8. Even if you set the Max. processor ...
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0answers
1k 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 ...
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80 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 ...
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96 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?
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47 views

Can I prevent Windows 7 from restoring my brightess setting when the power state changes?

I have a question regarding Windows 7. I have set different values for the screen brightness when on battery and when on AC power (in the power plan settings). If I manually change the brightness of ...
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0answers
524 views

Battery alarms and notifications don't work in Windows 8

It's about some months that I have a strange problem with my laptop battery. In the past, whenever my laptop went about 10% of battery, my operating system Windows 8 showed a notification alarm to ...
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89 views

Windows should display warning when on battery

I have purchased my first laptop recently. But, the problem is many times I forgot to connect it to power supply. Due, to which all of my battery get exhausted and I get warning when it is only 10% ...
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73 views

Linux : governer set to userspace in kernel but is always set to ondemand after the system's booted

I am using the 3.2 Linux kernel on a custom ARM board with Debian Wheezy. My kernel config. for power management is below. I want the system to default to the userspace governer (which the kernel ...
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199 views

How to create power profile with power.cfg in Windows 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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281 views

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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0answers
309 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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469 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 ...
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469 views

Windows 7 hangs after going into sleep a second time

I've searched everywhere around Google and can't figure out why this is happening so I decide to ask here to see if anyone has a problem like this. Like it says in the title, whenever I sleep ONCE ...
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0answers
80 views

No monitor after Windows 7 update

I recently installed Windows 7 on a Toshiba Satellite laptop. After updating, my machine would start but the screen remained off. I was able to fix this by connecting an external monitor. The ...
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616 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 ...
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0answers
223 views

How to find out which program prevents monitor going to sleep on Windows XP?

On a machine running Windows XP I have the problem that the monitor often does not enter standby/sleep mode. I guess this is caused by some program that is running, because it reliably works if I ...
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0answers
759 views

Wired network adapter doesn't function properly when starting Windows

Every time I start my computer, my wired network adapter stops working - this includes a cold start and resuming from sleep. If I head over to Network and Sharing Center and click Troubleshoot ...
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304 views

Disable External Wester Digital MyBook from spinning Down

I have this external hard drive for my cloud; and it constantly spins down. I do want it to do so. How do I disable this at the hardware level? I am able to disable this on my seagate drives at the ...
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344 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 ...
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147 views

Display automatically shuts off while watching videos

Whenever I'm watching a video streamed over the web, my display will auto-off due to not touching the mouse or keyboard. How can I configure the computer to not timeout like this while watching a ...
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0answers
646 views

Errors reported by “powercfg -energy”

Running "powercfg -energy" under Windows 7 command line, I received a report with following three errors: System Availability Requests:Away Mode Request The program has made a request to enable Away ...
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1k views

Can't disable wake-on-mouse

I have Windows 7 installed on Asus M4A785-T MBO. In BIOS, power settings are set to S3 (ACPI), and there is no S4 option. Wake on (lan, keyboard, mouse, etc.) - all of these are disabled in BIOS. ...
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959 views

Fujitsu Siemens V6535 laptop doesn't wake up - crash when going into standby?

I'm having trouble with my laptop (Fujitsu Siemens model V6535). It runs Windows 7, and after I upgraded from Vista I've noticed something that makes me really angry. When my laptop goes into ...
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400 views

Wake On LAN behaviour - works intermittently

When I send WoL packets over my network the specified boxes tend to wake up the first time I send the packet each day, but if I turn the box off then subsequent WoL packets tend to be unsuccessful. ...
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27 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
9 views

Forcing full CPU frequency despite not having the correct power adapter

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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0answers
28 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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10 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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0answers
24 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
33 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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198 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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23 views

Screen brightness

I bought a new Core i7 HP Pavilion 15-r122ne with Windows 8.1 preinstalled and Nvidia Graphics. I am new to Windows 8. When I am using laptop on battery and I launch different apps or pages the ...
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77 views

“No Battery is Detected” but battery works

The Question: How do I get my battery to be detected again? My system is dual boot Windows/Linux. On Linux, for a while, the system claimed that the battery was always at 15%. Now, it says there's ...
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16 views

Strange behavior checking disk power state

After sending the command to put a traditional hdd drive to sleep, via hdparm -y , I get a very strange behavior: If I execute this command: while [ 1 ]; do smartctl --nocheck standby -i /dev/sdb ...
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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 ...