Questions related to power management, particularly power saving measures.

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xubuntu 14.10 failing to sleep after inactivity - power manager error

After waiting well beyond my scheduled "sleep when inactive" time, the computer is still awake. I wiggle the mouse and unlock the machine to find an error notification in the upper corner, it read as ...
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9 views

Cannot boot to Ubuntu, Powercap/SELinux Issue

I am running Ubuntu (well, Lubuntu, really) on my home server, and all was tickety boo until a few days ago, when the OS stopped booting. Not being able to SHH in anymore, I hooked it up to a monitor ...
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7 views

Logind.conf HandleLidSwitchDocked

I've been trying to do a clamshell mode setup for my computer and I've seen many suggestions to use HandleLidSwitch=ignore. However this is not really what I want to do since I only want to keep the ...
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0answers
24 views

Battery discharges while AC is plugged in

I have a problem with my VN7-571G-56N0. My battery is discharging while the AC is plugged in. If i plug in the power cord, after i used the notebook with battery only, it charges it, but when i ...
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13 views

Suspend doesn't work after cloning SSD with Ubuntu to the identical MacBook Pro Retina

I have cloned the whole SSD (using the dd command) with fresh Ubuntu 14.10 installation from one MacBook Pro 15" Retina Mid 2014 to the identical MacBook Pro model (the old MacBook's screen was ...
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7 views

power indicator stuck after standby

As said, my power indicator gets stuck every time when my laptop wakes from standby (and I guess from STD, too), if I removed or plugged in the power adapter in the meantime. It displays the last ...
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0answers
11 views

My Sony Vaio VGN-N31M/W will not boot without the power cable plugged in

My Sony Vaio VGN-N31M/W only boots with the power cable plugged in. The screen simply hangs on the Grub screen, it loads when acpi is disabled but the laptop is then very slow and can not recognise ...
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23 views

Erratic battery behavior in Ubuntu 14.04

I have just made a fresh Ubuntu 14.04 installation on a Toshiba Satellite L735 laptop. When I turn on the laptop and it is plugged to the socket, the battery icon does not show ("Show battery status ...
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13 views

My laptop stops working when I open the lid after some period of time

Recently my laptop started to freeze when I reopen the lid after some period of time. The only thing that helps is to hold the power button for a few seconds and boot the laptop again. I have no idea ...
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1answer
21 views

Display battery percentage for mouse and keyboard

I've recently bought myself a new Logitech wireless mouse and keyboard set. To get these working in Ubuntu 14.04, I first paired them (unifying USB) using Winblows then I installed Solaar. The issue ...
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18 views

hdparm will not set spindown for disks 14.04 server

I have 4 HDD, one WD and 3 Identical generic brands. I have edited /etc/rc.local to change hdparm -B to 127 for the 3 generic drives (WD is unsupported and probably handles itslef) and -S to 180 for ...
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1answer
110 views
+50

Is it possible to disable a notebook's LEDs temporarily? (HDD, Power, Charging)

My question is whether it is possible to run a terminal command (or anything else) to disable a laptop's indicator LEDs. I have LEDs for CAPS, NUM and WiFi which are off anyway. But when it is dark ...
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1answer
38 views

How to put system to sleep instead of hibernate?

I am a newbie to Ubuntu, there doesn't seem to be any option to put the laptop to sleep instead of hibernate (suspend). Is there any way to put it to sleep instead?
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1answer
63 views

Power management and overheating

I have a HP envy 14. And dual booting windows 8 and Linux ubuntu 14.04. The problem is that it sometimes gets a little hotter than when booted with windows. Also I see that Linux "eats" the power. ...
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0answers
27 views

Can't suspend Ubuntu

I have an HP n008tu x360 laptop and whenever I click suspend from the menu the screen goes blank, the power button stays lit and I still hear the fan. On Windows, when I click sleep, I can't hear ...
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0answers
35 views

How to stop brightness changes (screen dimming) on low battery?

Ubuntu 14.10 automatically adjusts screen brightness on low battery. It does so despite explicitly being set not to. How to prevent this behaviour? I'd like the brightness to stay on the manually ...
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1answer
30 views

Power management failure and /usr/bin/sudo must be owned by uid 0 and have the setuid bit set

A few days age I purchased a new laptop, Asus X751MD, and I installed the 64 bit Kubuntu version of 14.10. After installing some programs and restarting the computer, I got the power management ...
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0answers
14 views

power button on fluxbox: how to “intercept”

When I press the power button, my computer shuts off. No warning. It is a software shutoff (A "ubuntu screen" apears for a time). This is inconvenient for me, because the power button is the only ...
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10 views

inspiron 1720 ubuntu 14.04 no battery switch over after removing power. power indicator is at 52%

Basic problem: NO battery switch over after removing power. It just dies. My battery indicator is gradually going down - currently its at, 52%, over the last five weeks from 62%. All suspension ...
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34 views

Battery management on Ubuntu

It seems like battery management in ubuntu is not as good as in Windows (at least for me), The battery in windows last for longer time. Another thing My laptop is on charge most of the time, but ...
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0answers
26 views

Maas Check Power State - Error: Unknown power_type 'ether_wake'

I have etherwake installed and Maas can use it to power on the nodes, but it can't shut them down and the "Check power state" button yields the error: Error: Unknown power_type 'ether_wake'. Am I ...
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19 views

What is the difference between these power warning settings, and are they the only ones?

What exactly is the difference between percentage-low, percentage-critical, percentage-action when dealing with battery power on a laptop? What exactly does each of them mean? My current settings ...
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7 views

Run command as root when waking from suspend

The mechanical hard drive on my netbook keeps spinning up and down. That makes an annoying sound and is bad for its health. I run sudo hdparm -B 254 /dev/sda and that stops it untill a suspend/wake ...
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39 views

How do I determine exactly why my computer is unexpectedly shutting down?

For a while now, in both Ubuntu 14.04 and 14.10, my laptop shuts down suddenly and unexpectedly. This only happened when the computer was on battery power, and only when the power seemed to get within ...
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57 views

MATE - Missing Suspend and Hibernate buttons, pressing power button shutdowns system immediately

I'm on Ubuntu 12.04.5 with all updates and with MATE 1.8.1 from PPA. With recent update I can't suspend or hibernate from mate-power-manager. If I press the power button the system shutdowns ...
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0answers
19 views

System restarts whenever ethernet cable is connected (and system is not connected to power source)

I have a strange problem with my Ubuntu 14.04 system. If my laptop is not connected to a power source, and I plug in my ethernet cable, the system restarts. It's an AMD processor with ATI radeon ...
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1answer
44 views

laptop monitor brightness always maximum upon charging

My laptop monitor brightness is set to maximum whenever I connect it to charging. I have gone to the brightness settings and changed this, but the problem repeats when I charge my laptop again...what ...
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47 views

Battery percentage won't go up while charging

I have HP notebook with a healthy battery. Problem is that when I try to charge it, system displays time remaining to charge and also percentage of the charge in the menu bar, but it stays stuck on ...
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0answers
8 views

Command to sleep (put into low power state) and scheduled task to wake back up [duplicate]

I can use sudo pm-hibernate to put my laptop into a low power state, but I have to press the power button to turn it back on. Is there a way I can put it into a low power state that can then be turned ...
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42 views

USB external HDD spins down, but just from command line. I must be missing something

I have two different external USB 3.0 hard drives connected to my Ubuntu computer and none of them auto spin down after 10 mins. Funny thing, if I run a Windows 8.1 virtual machine and attach the ...
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1answer
54 views

How to temporarily disable sleep and hibernate from the command line

It seems like there are many ways in which a Ubuntu's settings can be permanently manipulated to sleep when desired as long as predetermined conditions are met. However, these are more permanent ...
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0answers
33 views

Openbox and xfce4-power-manager

I am using Ubuntu and openbox. When I start up, I see the normal login screen like when using unity and it connects to Wifi. I have selected openbox from the dropdown list and it remembers this ...
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34 views

Is there any way to make the system not to suspend while a download in progress?

Is there any way to set the system not to suspend while a download in progress but only turn screen off?
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1answer
49 views

SED (self encrpyting disk) is crashing on system resume

I have asked this question before (here and here ) My problem is that my Self Encrypted Disk (SED) have to NOT spin down even on suspend! I have tried this, but it did not work and the disk spin ...
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1answer
28 views

How do I get my power indicator to reliably warn me before shutting off my laptop?

A while back I was having trouble because my power indicator for my laptop running Ubuntu never warned me when the power was about to go off. That was when using Ubuntu 14.04, and to be honest, I ...
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1answer
90 views

Screen dim while brightness set to max on Xubuntu 14.04 everytime display turns off

I used to have an issue where every time my laptop would return from suspend, the screen was fully dim (as if brightness was at a minimum) even though the brightness setting was set to maximum - so I ...
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1answer
30 views

USB Power Saving Settings

I have a USB weather station. If the screensaver kicks on (blank screen and lock), data from the weather station stalls out. I can lock the screen manually and I have no issues at all with the ...
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0answers
97 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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0answers
58 views

Battery efficiency issue in Ubuntu 14.04

I have an HP Probook 440 G2, with an intel core i5-4210U processor. I have dual boot windows 8.1 installation. I get approx 5+ hours of battery backup in Windows 8.1 and approx 2+ hours in Ubuntu. My ...
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1answer
91 views

how to disable charging in ubuntu when battery level is above 80 percent?

I tried various tutorials to stop charging laptop battery but it is not working on my Lenovo laptop. I tried following commands: sudo apt-get install tp-smapi-dkms sudo modprobe tp_smapi ...
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1answer
144 views

How to set hibernate/shutdown timers? XFCE power manager not having an effect in Lubuntu

I like to fall asleep listening to internet radio or a streaming video. I would prefer to have my computer go into hibernate mode an hour after I've become inactive, not 15 minutes after. I would ...
0
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1answer
63 views

Charging only ever reaches 95%

I am using Ubuntu 14.10. And my computer is always attached to an AC power source thus it is always charging. But I have noticed that my battery says it is charged when I click on the battery icon in ...
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79 views

Confused about Light Locker/Power Manager settings in Xubuntu 14.04

In Xubuntu 14.04, Light Locker and Power Manager settings are different control panel views, however, there are screensaver settings inside Light Locker's one. Anyway, there's no screensaver options ...
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1answer
44 views

Energy Saving on Ubuntu PC's (not Laptops!) [duplicate]

Can I use software designed for power saving on laptops on Home PC. (not a laptop) Or maybe someone could suggest alternative tools designed for saving power on PC desktop? What are the other steps ...
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0answers
89 views

Power Management

I'm running Ubuntu on an Acer Aspire V Nitro - VN7-571G laptop. The battery should last for 8.5 hours with Windows 8.1, but with Ubunt the battery drains in about 3 hours. Acer has no drivers for ...
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0answers
42 views

Laptop Brightness not remembered on Power Plugged in

On Ubuntu 14.10 Utopic, using a Samsung Notebook laptop, I can change the brightness correctly and it is remembered upon wake from sleep. However my problem is that when my laptop is on battery and I ...
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34 views

How to dump selected iwconfig outputs to text files? (to analyse Tx-power, bit rate, link quality, etc. for EMF reduction)

BACKGROUND I've read about Electromagnetic Field (EMF) pollution and I want to protect myself. I have a not bad solution for my smartphone, now decided to tackle WiFi. It appears that power of the ...
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0answers
29 views

Macbook 9,1 Ubuntu 14.04 keyboard issues on resume

I have read many similar post and tried nearly all post to no avail. Screen and keyboard illuminates; but no keys actually work. (I tried the F6 trick too) Trackpad does allow me to move the ...
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2answers
239 views

Laptop freezes whenever I unplug/plug in AC adapter

I have a Samsung Series 9 laptop, model NP900X4C. For a long time now this laptop has had issues with the battery and AC adapter, like this, which got fixed about six months ago: ...
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3answers
166 views

How to shut down Lubuntu immediately with the power button instead of a logout method dialog prompt

I would like the computer to shut down directly after I press the power button. At the moment, Lubuntu opens a shutdown method dialog box when I press the shutdown button. I suspect I can simply ...