Questions related to power management, particularly power saving measures.

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High number of interrupts on Ubuntu 15.04 on Dell XPS 13 2015 (9343)

In powertop I noticed a high number of interrupts 'INT3432', which I think would be either the touchpad or sound card. I am concerned on the effect on the power consumption and battery life. FYI I ...
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0answers
7 views

What is difference beetwen dim screen and screen energy saving?

What is difference beetwen dim screen and screen energy saving? I see these setting in power managment panel
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1answer
16 views

Disable faint of display Ubuntu 14.04

I want to know there is exist some way to disable faint of display brightness when I don't connected to energy network(I use notebook). I have already set on both pages Brightness and Supply to do ...
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0answers
14 views

External Drive automatically remounted and not powering down after detaching with udisks

Well this question may seems similar to these link: 1. How to prevent USB Drives from auto-remounting after remove. 2. USB 3.0 hard drives don't spin down when "safely removed" from ...
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0answers
64 views

Xubuntu 15.04 goes into sleep after powering up

Upgrade from Xubuntu 14.10 to 15.05 (Update history : 13.10 -> 14.04 -> 14.10 -> 15.04). The upgrading worked well. After rebooting the machine (Dell Inspiron 6000 - 10 years old) went automatically ...
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0answers
205 views

Message {1.079026} ACPI PCC probe failed; starting version 219

I am running Ubuntu 15.04 (Vivid Vervet) with 3.19.5-031905-generic #201504211114 kernel and GNOME Shell 3.14.4 on a Samsung NP370R4E laptop. When I boot up, I see [1.079026] ACPI PCC probe failed ...
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1answer
43 views

Ubuntu 15.04, pm-utils do not look into /etc/pm/power.d/ anymore, what instead?

Since upgrade from 14.10 to 15.04 my custom script which I used to setup proper thermal profile mode for my laptop ceased to work, which I believe is because pm-utils do not respond to AC/BAT ...
1
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1answer
24 views

Automatic switching between performance and powersave mode on plugging in/out the power supply

Recently I've been trying to investigate why my laptop is so slow. I found out that it runs at ~600Mhz, regardless of the power supply being plugged in or not. Note that it's Intel i5-2540M nominally ...
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0answers
24 views

Cannot shut down/restart without using the power button

I cannot get it to shut down/restart without clicking on the options multiple times and even then it won't without pressing the power button. System: Host: patrik-Lenovo-G50-45 Kernel: ...
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0answers
25 views

How do I stop the lock screen from dimming to black?

I've spent a ton of time searching for this on Google, and I still can't seem to find it. Please read fully before answering, because the majority of the answers I'm finding are about preventing ...
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0answers
28 views

How to increase battery life? [duplicate]

I just got my laptop and it came with windows 8.1 with which the battery life was pretty good but since I installed Ubuntu 14.04.LTS the battery life has been reduced. I want to know if there's a way ...
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0answers
13 views

suspended HDD spins up before system suspend

I'm booting Ubuntu 14.10 from the SSD ("sdb") in my notebook. As a second drive I have an HDD ("sda") which is kept on standby via entry in /etc/hdparm.conf: /dev/sda { poweron_standby = on ...
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0answers
16 views

Execute script on power supply connected

I am looking for a method that will call a script when the power supply is connected, or the battery state becomes "Charging". I will not accept answers involving any type of cron or loops. I know ...
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0answers
60 views

No Suspend option in Cinnamon after migration to Ubuntu Vivid 15.04 [closed]

Suspend was working perfectly until right before the migration to Ubuntu Vivid 15.04. I had the Suspend menu option, and the computer would suspend when the lid close. Right after migration, my ...
3
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0answers
21 views

USB Audio Problem [closed]

I have a Corewind WiFiG25 board based on the AT91SAMG25 400 MHz following Arm processor running Linux 3.6.9 built using Buildroot. I am attempting to play mp3 files using mpg123 connected to an ALSA ...
2
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0answers
42 views

Does Systemd read /etc/pm/…?

Do systems using systemd read and execute scripts in /etc/pm/sleep.d/ ? I'm starting to concluded the answer is that systemd ignores these scripts. If this is true what is the replacement? Update: ...
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2answers
30 views

how to control what opening the laptops lid does

my laptop's lid is a little broken and when i put it in it's bag it'll be open while i'm handling it and then it get's out of the suspend mode, how can i change what opening the lid does, i only found ...
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0answers
24 views

Ubuntu sleeps when power cable is removed

I just installed Ubuntu 14.04 on a Macbook 5,2. It works fairly well except that when the power cable is unplugged the desktop logs out, prompting the password menu and in less than a second the ...
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0answers
15 views

In battery mode disable apm hard drive sleeping?

I am using Ubuntu 14.04 LTS. I want to disable advanced power management level up to 255 when my laptop is in battery mode. At this moment amp change it to level 1 and it's very hard to deal with. ...
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0answers
14 views

Gnome Blank Screen Power Setting Option

I am using Ubuntu Gnome 14.10 and I am having problems with the blank screen option. I expect Gnome to blank the screen and lock my computer when I close the lid. However, it somehow suspends the ...
0
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0answers
20 views

HP battery not charging (works when removed/reinserted)

I've tended to have a problem with my battery on my HP sleekbook 15 on my ubuntu 14.04 installation. After going into hibernation or shutting down, when booted up, the battery is not charging... It ...
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0answers
20 views

Losing wireless networks on battery power 14.04

Running Ubuntu 14.04. Using a Dell Inspiron 5520. I assume this has to have been asked somewhere before, but Google has not been showing me any love whilst looking for a solution. If my computer is ...
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2answers
66 views

Power management for wireless unable to turn off in Xubunu 15.04 Vivid

I have tried everything that i can find on this site as well as the internet to turn off power management for the wireless card. ----------------My Current Conf-------------------- ...
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0answers
8 views

Change hard drive apm setting - spin down [duplicate]

My external USB hard drive is spinning down very fast (after about 1 minute). I remember I changed once the power management configuration which is inside the disk (Setting in flash ROM or something ...
0
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1answer
17 views

Ubuntu not shutting off [duplicate]

So I just installed Ubuntu 14.04 and it won't shut down after updating, I have to manually shut it down by holding the power key, it happens when I either try to restart it or shut it down. Anyone got ...
0
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0answers
41 views

Toshiba Satllite e45t Ubunut 14.04 - Heats up quickly, low battery life compared to windows 8.1

I bought a Toshiba Satellite 45t recently with factory windows 8.1. Did the usual UEFI and secure boot disablement and proceeded with installing Ubuntu 14.04 - dual boot with the Windows. Three days ...
1
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1answer
20 views

Is used content of memory saved to disk during suspension?

When suspending 14.04 on a laptop, is the used part of the main memory saved to the disk? I.e. is suspension save-to-ram or save-to-disk? If yes, saved to the swap partition or other partition? ...
0
votes
1answer
20 views

Setting to High Performance

When I had Windows 8.1, there was a power option for "High Performance" which allowed higher performance at the cost of power supply. Is there a way to set my power option to "High Performance" on ...
0
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0answers
19 views

Power management issues on my laptop

Yesterday I figured out that my System76 laptop isn't charging at all when it's both plugged in and turned on. IMHO it should charge at least a little so that when I grab it on the way out the door in ...
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0answers
18 views

Lid closing behavior Ubuntu XFCE

I'm running Ubuntu 14.04 with XFCE 4.12. With this configuration, I cannot get the lock screen when the lid is closed. Ideas?
1
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1answer
21 views

Notebook suspends only once

My ASUS U38DT performs suspend (after closing lid or choosin option) only once after reboot. Second time at the same session suspend doesn't happen. Wed Apr 1 00:21:45 MSK 2015: performing suspend ...
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0answers
43 views

Ubuntu 14.04 LTS battery indication wrong when unplugged

I just installed Ubuntu 14.04 LTS on my Asus R500V. When I used Windows 7, my battery would last for over 3 hours, but with Ubuntu the battery drains quickly per my battery indicator. Now the ...
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3answers
183 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 ...
0
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0answers
16 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 ...
2
votes
1answer
79 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 ...
2
votes
2answers
99 views

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 ...
0
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0answers
37 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
52 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 ...
1
vote
2answers
99 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 ...
0
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0answers
27 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 ...
0
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2answers
127 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, ...
1
vote
1answer
61 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
18 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
11 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
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0answers
59 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
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0answers
70 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
45 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. ...
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0answers
19 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
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1answer
12 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
60 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 ...