Questions tagged [power-management]

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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Change Windows 10 Power Slider programmatically

I want to set the Windows 10 power slider programmatically using poweshell or another CLI tool. I tried with the powecfg commande but it doesn't seem to affect the position of the slider. I tried ...
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Windows 10 server appears hung/asleep until user RDCs into the server

Background I have ten Windows 10 servers which are used to run regression scripts 24/7. There is another machine which has a controller software which sends scripts to be executed to the 10 servers. ...
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How can I figure out if my HDD is actually on or off now? Win10

I've set "Turn off hard disk after" value in the Power Options. But when I open my HDD in the File Explorer it happens instantly that's why I'm not sure if it's actually on or off at the moment. ...
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iMac G4 won’t turn on

I’m attempting to repair and old 2003 17” iMac G4 that won’t power on. It’s completely dead, no startup sound, fans don’t spin, nothing. I’ve tried the following so far: Attempted PMU reset using the ...
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Issues with Windows 10 Sleeping - USB Suspend Issues

My Windows 10 desktop computer won't go into sleep mode automatically after 10 minutes like I have it set to in the power settings. It will go into sleep manually if I choose it from the Start/Power ...
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What are the consequences of disabling “HID keyboard device is allowed to wake up computer”?

In Power Options - Advanced settings - Sleep - Allow wake timers: I have changed it to Disable for both battery and plugged in. This solution has been suggested to prevent the computer from waking up ...
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Windows 10 - apps shutting down when switching to battery power

I noticed for a long time already that some apps in my Windows 10 laptop (ASUS Zenbook) shut themselves down as soon as I unplug the power cable (switch to battery mode). Few examples of such apps ...
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how to enable adaptive brightness on windows 10?

I have a Dell Latitude 5590. The problem is Screen brightness does not adapt when it is plugged or unplugged. It is always the same. I manually reduce brightness when it is unplugged. And it remains ...
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How to force standby mode in OSX 10.13.6 if the battery level is lower than xx%

How can I set my PMSET Settings and force a Standby if the battery level is lower than 25%. Or just change the popup warning if the battery level is lower than 25%. (months ago I got a warning message ...
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Secondary Monitor Turning Itself on Shortly After Sleep

I've been Googling for a solution for quite some time now and most of everything I can find only relates to waking the computer. In my case, the my laptop (ThinkPad P1 Gen 2) turns off displays, the ...
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Windows System Idle Process - details on complex CPU power saving methods and other power-saving mechanisms [closed]

Wikipedia's article about System Idle Process states (emphasis mine): Later versions of Windows implement more complex CPU power saving methods. On these systems the idle thread will call routines ...
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OS Damage if PC Runs Out of Power in Sleep Mode?

If a computer is turned off using holding down the power button or loses power it could cause damage to the OS due to it not going through the steps it needs to take to shutdown properly. If a laptop ...
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HDMI Connection Keeps dropping when laptop unplugged from charging

I project my laptop's screen to my TV with an HDMI cable. So this problem started recently. If the laptop's not connected to the charging cable, the connection keeps resetting. If I plug the ...
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Windows 10 - CPU frequency at 0,4 Ghz and 100% CPU usage

I have following problem. Sometimes the CPU in my laptop has frequency changed to 0,4Ghz and CPU usage is at 100%. This can take few minutes and it takes at least 20-30 seconds to wake up laptop from ...
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Perf top reports symbol “__cpuidle_text_start” consuming 87% CPU time

I have powersave (C-states) disabled in BIOS and in the kernel config, however, CONFIG_CPU_IDLE is enabled, and related "__cpuidle_text_start" takes too much CPU time, while I am not really sure what ...
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13" Macbook 12 (2015) w/ Linux: Wireless (BCM43602) and backlight have very high power consumption sometimes

Running Gentoo Linux, custom-compiled kernel, on a 13-inch Macbook 2015 (12,1, model A1502). I've noticed that (according to powertop) power consumption of my wireless BCM43602 can vary from 1 watt ...
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Wake up laptop on AC while UEFI (BIOS) does not have that option

Been trying to setup my external monitor + laptop to act as a desktop (both to turn on with AC). Almost there - followed this thread which was massively useful, thanks all. Turn on Windows 10 laptop ...
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If I can't suspend an SSD-using machine, how should I conserve power when I'm not using it?

I'm having some trouble suspending my Xubuntu 19.10 machine that only uses an SSD for storage. However, I still want to be able to save power when I'm not using the system. How can I do this? Below ...
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Does swap size have any relevance to suspend to RAM?

I'm having some trouble suspending my Xubuntu 19.10 machine and I've recently heard a suggestion that I might need more swap. Currently I have about 1GB of swap for 8GB of RAM, which I've heard is a ...
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Have `Power mode (on battery)` revert to a default upon wake-up?

I just learned that on Windows 10, I can double-click the battery icon on the lower right corner of the desktop and access a control for the CPU performance when running off the battery. I will only ...
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157 views

Windows - Check if the monitor is powered on or off (check with software)

So I turn off my monitor (it's connected using a VGA cable and I turn it off with its power button) and I connect to my PC (Windows 10) from another device, mostly using AnyDesk, but TeamViewer is ...
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Battery shows 5% remaining after 8 hours of charging and sometimes says “Battery not detected.”

Some Observations The computer runs as expected when it is plugged in. After charging overnight (about 8 hours), the battery life is at 5%. Sometimes, the battery task bar icon says, "Battery not ...
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Cinderender NEM prevents computer from going to sleep when not rendering

ArchiCAD bundles a rendering software called Cinerender. When I keep ArchiCAD open my computer never sleeps and according to the Activity Monitor (see screenshot) this is caused by the Cinerender NEM ...
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323 views

Run script when power button pressed

When I push the power button, I want to run a script. For the sake of this scenario, say file.sh. So when I push the power button, I want to run file.sh and only file.sh. Most of the solutions I ...
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(Windows 10) Can a script be used to change the preferred graphics adapter for a certain application?

I have a 4k screen on my laptop, so sometimes certain desktop applications like Chrome take more GPU power to run than my integrated graphics is comfortable with. I want to be able to run apps such as ...
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255 views

Windows Sleep is Fake (YouTube plays for hours while “Sleeping”)

I have a habit of turning off my computer (sleep not shutdown) while I'm watching youtube. When I do this the computer pretends to sleep by turning off the screen, and even the hard-drive and "...
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VM does not have Sleep settings

I have Windows 10 Professional and Hyper-V. In one of the VMs, running Windows 10 Enterprise Evaluation, the Sleep setting in the Power Options is as follows: It does not have Sleep after and ...
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My HDDs are spinning randomly. How can I find out what is using them?

I run Windows 10 from an SSD, but the computer has 2 HDDs as well. Sometimes, they wake up (or at least one of them does) for no apparent reason, and don't go to sleep again, despite the fact that I ...
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573 views

Power management settings in Windows 10 (and BIOS)

I always found the power management settings and energy saving options very confusing since there are more than one. The first one being the dialog you can open from your taskbar. There is no ...
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Hybrid shutdown (fast startup) stopped working

My system in Windows 8.1 Recently the hybrid shutdown stopped working for me. The hybernation works just well, but when doing hybrid shutdown (it is enabled in the settings) or via shutdown command, ...
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Why can't an external keyboard or mouse wake up Windows 10?

In the device manager, I tried enabling the ability to wake up the computer but that tab (Power management) is not available for both external keyboard and mouse. I read that they might not support it....
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How to force Ubuntu to hibernate on low power as in MS Windows?

So I have been having this problem with Ubuntu since ages, most of the time I face the situation of power loss and hence when I try to get the system back on, I have to start a completely new session ...
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Laptop won't sleep when lid is closed

I have ASUS ROG and it won't go to sleep when I close the lid. I can still hear the music playing. I checked "Choose what closing the lid does" and I have "sleep". My old laptop sleeps automatically ...
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21 views

Tool to define Wake On Lan Patterns

I would like to set the Wake On Lan Pattern Match for my desktop's NIC. Currently I can wake it using the WOL Magic Packet. Even between subnets. But I would like to wake up my desktop using TCP SYN ...
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29 views

Prevent Linux system from going into sleep while process/shell is active

When i run apt-get upgrade, it works for few minutes (a lot things to download), but then system goes to suspend (according to behavior setup with KDE->Powersaving settings). I am looking for a ...
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219 views

Keep Ethernet USB Adapter On While Laptop Sleep or Hibernate

I tried to remotely wake up my Windows 10 laptop by connecting an Ethernet cable from my Raspberry Pi to an Amazon Basics Gigabit Ethernet USB Adapter, which I plugged into the USB 3.0 port of my ...
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61 views

How to deactivate USB power management for every device per batch/periodically?

In "Control Panel" → "System" → "Device Manager" → "Universal Serial Bus Controllers", it is possible to deactivate "Allow the computer to turn off this device to save power" within "Power Management"....
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Ethernet driver Power Mangement bug workaround

I think I have found a bug in the Power Management settings of the ethernet drivers in Windows 10 (see: Control Panel / Device Manager / Network adapters / %my ethernet card% / Properties / Power ...
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Keeping Windows accessible for remote desktop

I have a Windows 10 PC that I would like to maintain accessible to remote desktop connections, at all times, no matter what. However, I can't seem to figure out the right combination of settings to ...
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61 views

Update Orchestrator Wakes PC, Won't Return to Sleep

Windows 10 laptop keeps waking and will not return to sleep. Checking the Even Viewer, the apparent cause is the Update Orchestrator Service waking it up. This is fine, except that it doesn't put the ...
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479 views

PreventUserIdleSystemSleep Process on a MacBook Pro

My girlfriend's Macbook Pro appears to no longer go to sleep when closing the lid, so that the battery depletes really fast. As I'm no Mac expert, I looked around, and learned to look at the processes ...
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hdparm APM settings not working with external hard drive

I'm using hdparm on my external hard drive on raspbian to change the time until it enters standby. However the drive still goes into standby way too early (sometimes after as early as 5 minutes). I'...
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168 views

Keyboard prevents PC from sleeping; how to debug/solve?

My self-assembled PC fails to enter sleep mode. I managed to track it down to my trusty Logitech G15 (v1) keyboard; if I disconnect it or if it replace it with another keyboard, the PC does enter ...
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High Power Usage For Low Performance Programs Are Causing My PC To Freeze

My power usage often spikes causing my PC to freeze or lock up even for programs like Google Chrome or Discord and I have no idea why. Below are my PC specs: GA-B450M-mATX Gaming Motherboard. ...
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How do I make windows suspend for some time then wake up (like rtcwake)? [duplicate]

I want to make Windows 10 sleep/suspend for a while and then wake up. I can do this on Linux with rtcwake. What is a similar utility for Windows?
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My windows rearrange whenever my monitors wake up

Computer has two monitors. One on PCI-Ex video card and one on the onboard video. The PCI-Ex card is primary both in the BIOS/UEFI and in Windows. I tend to leave a lot of windows open all the time, ...
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394 views

What is “Energy Lake”?

My Phoenix AwardBIOS setup utility offers an enabled/disabled option for "Energy Lake function", with default being disabled. In a year 2009 document Intel® Desktop Boards BIOS Settings Dictionary I ...
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489 views

From a power consumption POV, how does a new typical NUC CPU compare wth an IVY bridge CPU?

I understand has put Intel focus onto increasing the efficiencies of their CPUs, but I'm unsure how to interpret this in the wider context of a desktop CPU. I am looking to replace my laptop with a ...
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61 views

Power management issue or network connectivity

I'd like to have your advice, folks. It's in my business environment and I am assigned to fix the issue.I have PC running Windows 10. It's on LAN but not in domain. Every night it should 'copy' a ...
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95 views

How do I control which power plans are “preferred” and which are “additional”?

In Control Panel\Hardware and Sound\Power Options, some power plans are "preferred" and some are "additional". I want to make an "additional" plan into a "preferred" plan. How can I do this?

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