Questions related to power management, particularly power saving measures.

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22 views

How can I wake up my computer from suspend?

After the latest update, my machine isn't waking up from suspend, and I have to hard-reboot it. This only happens sometimes, and I can't tell under what exact circumstances it happens. I think it's ...
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0answers
11 views

Action on low power when computer is sleeping

I usually suspend my laptop. But I don't know what my netbook does when the power is critically low and it is sleeping (maybe it turns on and performs poweroff process or it just stops power supply of ...
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0answers
20 views

Acer Aspire power management

I'm working to fix my Acer Aspire One netbook so that power management is working. Currently, it goes to "suspend" when either the lid is closed or it is idle. However, it must still be using ...
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0answers
31 views
+50

Automatic wake from suspend when power restored to laptop

I'm using a Chromebook with Ubuntu 14.04.2 LTS installed as an embedded system of sorts. I've figured out how to have it automatically suspend when disconnected from power by adjusting the power ...
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19 views

Disable USB port

currently I have a pcDuino3 running Lubuntu 12.04 and I have some usb devices attached to it. I was wondering if it is possible to disable power to specific USB ports. I have looked at other methods ...
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0answers
30 views

How to use UPS with Ubuntu 14.04

Hello I have a UPS but can not see what procedure the battery and how to remain percent spending. Here I attach some photos looks like the battery of Ubuntu 14.04 The battery once it exists, and ...
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2answers
51 views

14.10: Battery indicator stuck on 64%

Yesterday I saw that when I plugged my laptop the battery indicator still showed me that I was on battery life instead of direct power. The percentage was 65% and after a few hours on power the ...
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0answers
14 views

How to disable SSD power down when suspend to sleep?

I have a laptop with a brand new SSD. And I read hint about disabling hibernation (I don't use it) and even let the SSD powered on while in sleep mode. The latter activates Active Garbage Collection ...
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1answer
46 views

External USB hard drive, WD Elements, not power off itself

I own a Seagate Free Agent external hard drive for last 4-5 years. After plugged in and finished with file transfers I will click menu 'Safely remove'. Then it will gracefully shut down itself, ...
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1answer
39 views

How can I tell Ubuntu 14.10 to do nothing when I close my laptop lid?

The issue is solved temporary using the method in this forum, but only if I have fresh boot, if i suspend my laptop and wake it again, Ubuntu will ignore my rules, and suspend when i close the lid. ...
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0answers
16 views

System no longer shuts down or wakes up from suspend after enabling hibernate

I recently tried to enable hibernation in Ubuntu 12.04 for my Acer-Aspire-S3. This resulted in catastrophic disaster--the laptop no longer shuts down correctly (it freezes at the Ubuntu logo) nor ...
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0answers
10 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 ...
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0answers
33 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 ...
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0answers
41 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 ...
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0answers
28 views

Power-management issues

I need some assistance debugging my power-management issues on my laptop (Dell Inspiron 14-5447). I'm having some sporadic issues with different components going into or coming out of suspend. I ...
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0answers
12 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 ...
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1answer
10 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 ...
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0answers
36 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 ...
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0answers
41 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 ...
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1answer
62 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. ...
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0answers
14 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 ...
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0answers
54 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 ...
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0answers
69 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 ...
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0answers
33 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. ...
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2answers
134 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
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1answer
129 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 ...
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0answers
75 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 ...
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0answers
60 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 ...
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0answers
20 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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0answers
35 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 ...
1
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1answer
101 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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0answers
31 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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0answers
14 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
25 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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0answers
23 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
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1answer
38 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
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1answer
43 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 ...
6
votes
1answer
138 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
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1answer
48 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
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1answer
109 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
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0answers
37 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
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0answers
69 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
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1answer
42 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
20 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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0answers
18 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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0answers
41 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
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1answer
71 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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0answers
20 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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0answers
11 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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0answers
58 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 ...