Questions related to power management, particularly power saving measures.

learn more… | top users | synonyms (1)

0
votes
0answers
12 views

Conflict in Power Settings rating and Battery reading in menu

I have conflicting battery status readings when viewed in the dropdown user menu vs that shown in the Power Settings dialogue (which is the correct reading of the two). In fact, the status in the ...
0
votes
0answers
62 views

Ubuntu 14.04 power manager not working

The power manager has suddenly stopped working on my Ubuntu. It shows plugged in and 100% charged all the time. I'm using dual-boot with Windows 7 and the Windows power management tool is working ...
0
votes
0answers
75 views

Please help! Blinking orange lights on laptop, battery not charging

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 ...
0
votes
0answers
46 views

Suspend-resume-shutdown errors

System Description: I am running a laptop (Dell Inspiron 14-5447) with Linux kraftlj-Inspiron-5447 3.16.0-31-generic #43~14.04.1-Ubuntu SMP Tue Mar 10 20:13:38 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux. ...
1
vote
0answers
20 views

pm-suspend works, but clicking on “suspend” from GUI menu does nothing?

If I run sudo pm-suspend, it suspends correctly, and resumes too. No issues. But the OS timeout setting of "5 Minutes" from the "Power" menu in settings does not suspend the machine. Also, the GUI ...
0
votes
1answer
14 views

Power Management - OnSleep hook

Is it possible to have a script invoked when my PC decides to sleep or when it is put to sleep manually. What I am trying to do is to have a script that will take down my VPN and the SSH key, when ...
0
votes
0answers
64 views

Hardware incompatibilty HP proliant DL380 e Gen8 and pacemaker/corosync . Ubuntu 14.04 LTS

We have 4 servers HP proliant DL380 running Ubuntu 14.04 LTS. We have frequent kernel panics in all the servers at the same time, and we consider that are related to the way the these servers manage ...
0
votes
0answers
65 views

Ubuntu machine waking up immediately after suspend, need help solving it!

So I've Googled a bit and it seems this is a well known issue. I just need some assistance with my particular setup. I have Ubuntu 14.04 loaded onto a machine that I use as a Plex Server. I've ...
2
votes
1answer
76 views

Unable to revive computer from suspend mode in Ubuntu 14.04 on Thinkpad

I have recently installed Ubuntu 14.04 on my Thinkpad E440. Though I generally don't use Suspend option, but whenever by mistake I select that option, my laptop goes to low power state as expected. ...
0
votes
0answers
27 views

Problems opening Ubuntu 14.04 on my laptop (when using battery power)

I had Ubuntu 14.04 installed on my laptop, but for some time (possibly since before 14.04 was installed) did not use battery power, relying on the power adapter. I recently bought another battery and ...
0
votes
0answers
77 views

How to wake up my Laptop from sleep (suspend) when AC charger connected

In my area, electricity turned off for some periods, so I configured my laptop to goes to sleep when battery percent 10%, but I want it to wake up after AC charger is charging on. is there any way to ...
0
votes
0answers
74 views

Ubuntu loses network connection and dpms becomes re-enabled after unplugging AC adapter on Macbook Pro

On Ubuntu 14.01, when I unplug my AC adapter, the network connection is lost (even with connected to wired via eth0). Also, the dpms settings are lost. So even though I run "xset -dpms", that setting ...
0
votes
0answers
39 views

Ubuntu 14.04 LTS Keeps Shutting Down Following Feb. 2015 Updates

I've never had this problem before, but the Ubuntu 14.04 LTS keeps shutting down if I'm away from the keyboard for any meaningful length of time. This has been the case since the most recent Feb. ...
4
votes
2answers
205 views

Enable full performance on Sandy Bridge laptop

I have 2nd gen Intel i7 laptop. I use Thermald and tlp for managing battery life (they are great!). However, sometimes I don't care about noise and power consumption, and want the CPU to run at full ...
6
votes
1answer
159 views

Entirely disable suspension (at kernel level? - has to be independent of used DE and login state!)

Once again I need a workaround to deal with my almost broken notebook graphics card: It does not wake up after suspending! The Ubuntu 14.10 system is waking up, but the display stays off, so I have ...
0
votes
0answers
129 views

NVIDIA force GPU to AC performance state

I have a Dell M6800 and a K4100M and Optimus disabled on 14.04. When it is not on the official DELL 230W charger, the system will limit the GPU to lower power states. Even when just on battery, the ...
0
votes
0answers
103 views

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 ...
0
votes
0answers
28 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 ...
1
vote
0answers
80 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 ...
0
votes
1answer
130 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 ...
0
votes
0answers
44 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 ...
0
votes
0answers
18 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 ...
1
vote
0answers
42 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 ...
0
votes
0answers
32 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 ...
0
votes
1answer
69 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 ...
0
votes
1answer
77 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 ...
7
votes
1answer
155 views

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 ...
2
votes
1answer
54 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?
0
votes
2answers
134 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. ...
0
votes
0answers
42 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 ...
0
votes
0answers
100 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 ...
0
votes
1answer
74 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 ...
0
votes
0answers
30 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 ...
0
votes
0answers
28 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 ...
0
votes
0answers
45 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 ...
0
votes
1answer
130 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 ...
1
vote
0answers
22 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 ...
0
votes
0answers
14 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 ...
0
votes
0answers
68 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 ...
1
vote
0answers
255 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 ...
1
vote
0answers
24 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 ...
0
votes
1answer
61 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 ...
0
votes
0answers
99 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 ...
0
votes
0answers
9 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 ...
0
votes
0answers
75 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 ...
1
vote
1answer
152 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 ...
0
votes
0answers
77 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 ...
0
votes
0answers
36 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?
1
vote
1answer
70 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 ...
0
votes
1answer
42 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 ...