Systems to manage power consumption, such as system suspension and hibernation, CPU speed adjustment, disk spindown, battery usage monitoring, …

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FreeBSD throttle cpu clock on high temperature

I'm using a laptop with bad cooling system, so my CPU sometimes hits very high temperature, and linux kernel is able to throttle cpu clock to cool it as I can see in dmesg: [22612.245243] CPU3: Core ...
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13 views

Run script on Gnome 3 suspend

I need to run a script on Gnome's standard suspend action (via top-right taskbar menu item, with Alt key pressed) Looks like Gnome doesn't use pm-utils, so I have no idea where to put my script
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5 views

Reduce CPU wakeups by cinnamon and i915

In order to reduce my notebook's power consumption I am using PowerTOP 2.5. hardware: Thinkpad W540 os: Linux Mint 17.3 Rosa kernel: 3.16.0-38-generic I noticed that cinnamon and i915 are the ...
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16 views

Detect power loss

Is it possible to detect loss of power on a laptop/desktop without an UPS? Obviously a computer without an UPS will shutdown at least almost immediately after being unplugged/having its battery ...
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7 views

upowerd consuming 100% cpu

upowerd is consuming nearly 100% of CPU. I am currently affected by this issue on both a Lenovo Thinkpad E520 and on a desktop PC running Core i7 and Asus Z170a motherboard. Both run Kubuntu 15.10. ...
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1answer
25 views

How to disable Wifi Power Save on Kali Linux

I am running kali with virtualbox and my wifi receiver is a usb adapter which is Asus N10 Nano. I made the settings on virtualbox for making the vb recognize my usb wifi adapter. It works but after ...
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31 views

What is the power dissipation of the CPU and how does it work?

I'm looking into TLP and there is this setting that I don't know what does it do: # Set Intel P-state performance: 0..100 (%) # Limit the max/min P-state to control the power dissipation of the CPU. ...
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22 views

Why does my Debian desktop no longer power off when told to? [closed]

sudo poweroff and sudo shutdown -h now used to result in my machine entering the shutdown run level and powering down. These days the machine goes through the shutdown procedure but the power is ...
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30 views

Battery never stops charging!

I have a Manjaro Xfce latest version. My laptop is a Lenovo Z500. I've recently noticed that my batter is always at %99 and keeps on charging. Is there a way to make it stop charging at 99%, or ...
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8 views

Phone battery charging

Smartphone's battery charges when it is linked to an USB port. Is there a way to make the process faster by modifying some parameters in Linux?
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17 views

Preventing battery from constant charging in Ultrabook

I'm running Debian Jessie (64-bit) on a newly-acquired Samsung Ultrabook NP900X3E, so far everything's working as it's supposed to. However, the battery life is okay, but not great. Therefore, I ...
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69 views

card reading killing my battery, on macbook pro running Debian

I am currently using a macbook pro but the operating system is debian 8.2 not os x I am using a macbook pro but there's this one device that's just draining a lot of power. This USB device: Card ...
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27 views

Is the current power management (battery) in Linux efficient enough like Windows? [duplicate]

I am actually traumatized by my experience in 2011 using Linux on bare metal in regards to battery. The laptop came with Windows 7 Home. I got around 4 hours when using battery. After 4 months, I ...
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10 views

HowTo Suspend / Sleep / Spin down disks in RAID - Creted by the debian installer?

I have created a RAID 1, with two disks using the debian installer. The RAID is used in my server. Due to the fact that it's a private server and I don't care about performance but more about ...
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77 views

Debian 8 hibernate and suspend not working

I've read these two official documentations on the matter: https://wiki.debian.org/Hibernation#Suspend_and_hibernate_configuration_in_Debian_Jessie https://wiki.debian.org/SystemdSuspendSedation I've ...
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100 views

Debian Jessie suspend problems - how to force system to use pm-utils instead of systemctl

I have an Acer Aspire One Netbook with a Radeon GPU, using the firmware-linux-nonfree (20151018-2~bpo8+1) drivers, which work fine except for hibernate and suspend. When resuming from either, the ...
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14 views

Thinkpad T61: Udev-rule not working

I'd like to create a special udev-rule to improve the batterylife of my thinkpad T61 by set the brightness to a low value if the power supply is unplugged and my laptop using the battery. Therefore I ...
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39 views

How do I enable laptop settings in debian?

I have just installed debian jessie and have installed laptop-mode-tools. However, looking on the Laptop Mode Tools page, not only is there a plethora of options, but it also says this software should ...
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1answer
225 views

Trouble changing backlight brightness (/sys/class/backlight folder empty)

I have a small embedded system that I am working on that needs to be able to reduce its brightness for power saving reasons. The screen is connected by LVDS with separate Inverter Power Output ...
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369 views

Gnome 3: how to set power button to shutdown instead of suspend?

I am using GNOME 3.18.1 on Arch Linux 4.2.5-1-ARCH x86_64 on a Dell E6530 laptop. Since I installed this OS years ago, the power button on my laptop has always led my OS to completely power down. ...
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27 views

How to automatically load a new VID&PID to module usb_serial

I have a 4G module that requires me to run echo '03f0 581d' > /sys/bus/usb-serial/drivers/generic/new_id after every startup/resume to make the modem visible. How should I make this automatic? ...
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1answer
110 views

Prevent USB hard drive enclosure from powering off after inactivity

I have successfully used 'hdparm' to disable APM (Advanced Power Management) on external USB hard drives. Now I've come across a USB hard drive enclosure that itself turns the installed hard drive ...
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1answer
79 views

How to disable fade to black for the fullscreen console

After a while of inactivity the fullscreen console fades to black until I press a key. I want to disable the fade to black on my fullscreen console running in a VirtualBox. I'm running Debian 8 ...
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71 views

Triggering Linux shutdown on power failure

I have an embedded Linux system (currently running Angstrom) with supercapacitor hardware to provide time for writes to complete and avoid corrupted filesystems when external power is removed. ...
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160 views

Laptop battery doesnt raise from 59% (ie showing wrong battery stats )

iam using LinuxMint-17.2 Lenovo z500 fixed Nvidia gpu issues (installed bbswitch successfully ), also fixed Screen backlit issue iam only left with this battery issue Battery indicator is not stuck ...
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37 views

Laptop does not work without power source

Installed manjaro linux to the laptop today and discovered that it is not working with disconnected power source. Here is dmesg output: And upower -d: Manjaro 15.9, kernel 4.1.8, Cinnamon DE (if ...
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159 views

Ubuntu Server monitor goes to sleep in 10 minutes [duplicate]

Is there a possibility to disable the monitor sleep in Ubuntu server 14.04? After 10 minutes my monitor goes to sleep. I've already tried several options, from ...
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6 views

How to allow hibernation on Linux mint 17 [duplicate]

When I press the power button and the window with power options(shut down, log off, etc) shows, it doesn't include hibernation. I know hibernation is different from suspension, so how do I allow my ...
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37 views

How to prevent closing lid events when system hibernates?

I'm using Linux Mint XFCE 17.2 (V-init), kernel 3.16. When I choose hibernate or shut down in xfce-logout dialog and close the lid immediately - notebook suspends. But it should ignore lid event for ...
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1answer
100 views

System event on AC adapter insert or battery unplugged?

Does Ubuntu 15.04 (or maybe just Linux in general) have any sort of measurable event that fires when a laptop's AC power is disconnected and the unit flips over to battery power? I would like to ...
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71 views

Xubuntu 14.04 does not suspend; instead it freezes and blanks the screen

For the past 2 weeks, ever since I've updated my kernel to 3.16.0-48-generic, my suspend option in the xfce4-session-logout popup fails to work most of the times. The screen switches off, but the ...
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137 views

Install powernap on debian?

I just read about powernap here but don't know how to install it.. Download and untar was simple: axel https://launchpad.net/powernap/trunk/2.20/+download/powernap_2.20.orig.tar.gz && tar ...
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poweroff nvidia gpu

lspci result: $ lspci -nn|grep -iP "NVIDIA|Radeon" 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn PRO [Radeon HD 7850] [1002:6819] 01:00.1 Audio device ...
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1answer
165 views

Lenovo Laptop won't charge above 59%, Elementary Os Freya (Ubuntu 14.04 LTS based I hope)

When I had windows I used lenovo energy managment and set the battery to charge up to 60% only as it recommended it to me. Yesterday I switched to Ubuntu and now I have this problem. It would be great ...
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1answer
58 views

Which distro to switch to (laptop) [closed]

I switched to Linux Ubuntu 14.04 from Windows 8.1 about a month ago because I wanted to get more out of my laptop (Lenovo Flex 2). I have been trying to either solve or ignore some issues that I have ...
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62 views

tuned on fedora 22 - setting different alpm policies for specific devices

I'm trying to configure alpm to max_perfomance on my system disk, medium_power on my data disks and min_power for backup disks. I tried various variations in tuned.conf but the result is that the last ...
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1answer
31 views

Why doesn't copying large files prevent Linux from going into power saving mode?

This problem happened to me when copying backups from an SSD to an external SSD. As suggested in the answer there, I had to change my power settings to set "suspend when inactive" to "never" in Debian ...
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1answer
366 views

NMI received for unknown reason 20 — Do you have a strange power saving mode enabled?

I am using Debian GNU/Linux 7.8 (wheezy). While running my MATLAB program today, I got this message in terminal. Message from syslogd@sas21 at Jul 18 16:40:49 ... kernel:[1747708.091929] Uhhuh. NMI ...
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253 views

Huge battery drain during suspend to ram - 12%/hour - nvidia card doesn't turn off

UPDATE: So I tracked down the issue. It seems the nvidia card powers up right before suspend. This is expected bbswitch behaviour: [ 4195.214014] bbswitch: enabling discrete graphics But for ...
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144 views

How to switch power save mode between PS Poll and UAPSD (WMM) modes in CLI?

I'm trying to figure out if there are any chances to switch on/off U-APSD power save mode at my laptop. Currently I found a command to switch power save mode on/off: root@host # iw dev wlan3 set ...
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56 views

Set computer to suspend after a certain time when not logged in?

I realize that you can set the power preferences for when to shutdown, suspend, and spin down hard disks and so on. However, I find that seems to only work when I've logged in and then leave the ...
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1answer
409 views

Battery indicator problems after installing and uninstalling kubuntu-desktop package on Xubuntu 15.04 x64

A few weeks ago, I decided to get adventurous and install different interfaces on my Lenovo T420 running Xubuntu. I decided to jettison Kubuntu after trying it out (just not my style) and kept Xubuntu ...
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194 views

Why does my MacBook CPU get hotter under NixOS than under Mac OS?

I have a dual boot MacBook (late 2008) with Mac OS 10.9 and NixOS. I observe that under similar conditions, with only one or two applications open and not doing any computations, the CPU gets 5-10 °C ...
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2answers
189 views

How can I reduce my Laptop's power consumption when running Linux?

I just installed Linux on a laptop of mine (it's Lubuntu 15.04 on a Lenovo X201, Core i5 M540, 2GB mem). I'm currently seeing 21580 mW power draw with a couple of apps open (Firefox with a few tabs ...
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Screen blanks at login screen

On Linux Mint 17.1, the screen blanks when left idle. To stop this from happening, I have checked all the obvious candidates on the Power Settings and Login Window screens. Can anyone help me ...
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212 views

Disks (in usb enclosure) keep waking up even when not mounted

Setup I have USB enclosure (Buffalo DriveStation Quad) containing four drives connected to my nas server (ubuntu server 14.04). The enclosure is configured to JBOD mode, so I'll see all the disks in ...
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112 views

Is my MacBook Air sleeping under Debian Jessie?

I frequently notice the Apple logo lights up relatively briefly when the lid is closed on my MacBook Air running Debian Jessie. If I suspend with the lid open then the lock screen briefly appears and ...
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0answers
348 views

Lenovo T440s battery status unknown, but charging?

I'm trying to configure my Lenovo on arch linux. The last thing I need to do is get the battery 100% working. Right now it appears that the main battery's state is unknown: ...
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18 views

Set the cpu frequency upon resuming from suspension?

On Ubuntu 14.04, I hope to set the cpu frequency upon resuming from suspension, so I created a file /etc/pm/sleep.d/20_cpu_freq with content: #!/bin/bash case $1 in resume) ...
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1answer
256 views

Can I read settings in BIOS without restarting Ubuntu

Can I read my bios settings under Ubuntu without restarting? For example, I'd like to check the sleep settings in my BIOS, S3 (suspend) or S4 (hibernate). As of now, I can't hibernate, and am ...