Questions related to power management, particularly power saving measures.

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1answer
54 views

How to remotely power on nodes on maas 2.0

I wonder if anyone minds instructing me how to remotely power on a node on maas since on maas 2.0 wake-on-lan is no longer available on power type options you were able to choose from at the maas gui'...
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0answers
18 views

Auto stand-by HDD at startup?

I have 3 storages in my NB: 1. SSD with Ubuntu 2. HDD for data like downloads, movies, etc. 3. HDD with Windows which I use just occasionally since I installed Ubuntu I want to restrict activity of ...
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1answer
283 views

Power meter ACPI000D:00: Ignoring unsafe software power cap

I get the following message on Ubuntu 14.04 during boot: power meter ACPI000D:00: Ignoring unsafe software power cap The message comes up shortly after the red/orange Ubuntu background appears and ...
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0answers
44 views

Can't hibernate 16.04 PowerEdge

I'm using LXDE on 16.04 via x2go. I have XFCE, MATE, LXDE, and Unity installed. The original install was 14.04 on an AMD Phenom x4, then I swapped the HDD into a Dell PowerEdge with a dual-xenon. I ...
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1answer
73 views

My HP laptop is over-heating after installing Ubuntu

I bought a new laptop a week ago (HP Pavillion 15-ab523tx) and I dual boot it with Ubuntu 16.04 along with preinstalled Windows 10. While running Ubuntu my laptop gets extremely hot.I read about it ...
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13 views

How to stop screen from sleeping after I lock my session? [duplicate]

First time posting here, so here goes ... I have Ubuntu 14.04 LTS and the issue I am having is that I want to prevent my screens from fading to black and powering down when I lock my session. ...
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0answers
22 views

MAAS custom power type

I would like to use MAAS in a custom environment. Actually, the servers are usual machines with netboot capability, however, the power (rack) controller is a linux box. I can login via ssh into the ...
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0answers
70 views

Ubuntu 16.04 Battery Drains to 50% in shutdown in 5-6 hours [HP pavilion Gaming Notebook]

I have a dual boot system with windows 10. I use ubuntu most of the time and in the night when i shut it down with 90%-95% battery. Next morning when i open up the laptop, the battery is drained to ...
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0answers
83 views

Ubuntu 16.04 saying battery discharging even after plugged in charger

I have plugged in charger and run following command: cat /sys/class/power_supply/BAT0/status It says discharging in both cases plugged in or plugged out. Even battery icon indicator is not changing ...
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0answers
156 views

Ubuntu 16.04 Black Screen After Suspend

I've seen this issue reported but have not seen a solution working for me. I did a fresh install of 16.04 and everything is working great. The only problem I'm having is when I close the lid on my ...
1
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1answer
76 views

Ubuntu 14.04 battery status unknown or 0%

I am using Ubuntu 14.04. Today all of a sudden when i turned on my laptop the battery was critically low and it logged off but i remember charging it to 100% the night before. When i logged on this is ...
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1answer
58 views

Freeze after closing lid. Suspend with pm-suspend works fine: Ubuntu 14.04 on Thinkpad T460s

When I call pm-suspend from a terminal, it works fine. But when I close the lid (on battery, which should suspend the system) and reopen it, the system freezes and the CPU spins a lot. By the way, I'm ...
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1answer
104 views

[TLP]-error: “tp-smapi = inactive (kernel module 'tp_smapi' not installed)” on thinkpad t460s

when I ask tlp for my battery status via sudo tlp stat -b I get the following status: +++ ThinkPad Extended Battery Functions tp-smapi = inactive (kernel module 'tp_smapi' not installed) tpacpi-...
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0answers
71 views

Insanely high battery discharge rate while charging

Having a strange issue with my battery meter in Ubuntu 16.04. I had the same issue in Debian, so it's possibly an issue with the battery itself, but let's see what you think. These are screenshots ...
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0answers
29 views

How To Have Record of Factors Affecting Parameters of Powertop?

The application powertop can show about power consumption. However, I would like to have a record about processes which affect those parameters because they change without my wish, most probably ...
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0answers
56 views

Cannot hibernate Ubuntu 16.04

I'm trying to enable hibernation on my Asus G501 but it doesn't seem to be working. I've followed a number of online resources like this one: https://help.ubuntu.com/lts/ubuntu-help/power-hibernate....
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1answer
289 views

Ubuntu 16.04 LTS black screen after suspension on Dell [duplicate]

I have a Dell Inspiron 15R with Intel® Ivybridge Mobile Graphics. I upgraded to Ubuntu vanilla and the latest version (16.04) few days back. Each time I close the laptop lid with the power source ...
1
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1answer
67 views

Samsung Battery Life Extender - limit battery charging to 80% under Ubuntu

Some of you may have used Easy Settings app that's provided by Samsung for Windows OS. Similar Samsung's tool for Linux OS distributions isn't available. I missed Battery Life Extender function the ...
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0answers
77 views

Pm-hibernate - doesn't work, or create log file

Preliminary ubuntu 16.04 dual boot on a disk that also runs windows 10 hibernate works in windows 10 swap partition is the same size as RAM Problem When I run sudo pm-hibernate from the terminal ...
0
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1answer
43 views

echo 1 > /sys/bus/pci/slots/$4/power bash: /sys/bus/pci/slots//power: Permission denied

On typing echo 1 > /sys/bus/pci/slots/$4/power, I get this error: bash: /sys/bus/pci/slots//power: Permission denied Here is the output of lscpi -vvon my system: 02:00.0 Multimedia controller: ...
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0answers
1k views

Ubuntu 16.04 won't shutdown

On my MSI GS60, when I try to power off Ubuntu 16.04 LTS the laptop will not shut down. Reboot works fine though. I have removed the quiet splash parameters for grub so I can see the output. When I ...
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0answers
30 views

Is there a way to disable sleep of a remote computer from command line?

It's an Ubuntu 12.0.4 computer that I have access only through ssh. How to prevent it from going to sleep?
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1answer
80 views

Battery information is wrong

I have replaced the battery in my laptop with a lower capacity battery than what was previously inserted. Ubuntu hasn't calibrated the battery metering system, and so the statistics & percentages ...
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0answers
27 views

Bluetooth loses connection with mouse in 14.04

recently i bought Thinkpad bluetooth mouse (OA36414) however, the mouse lose connection from my laptop (ubuntu 14.04) from time to time which troubles me a lot. I have read this enter link ...
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1answer
141 views

Ubuntu drains battery very fast on 16.04

I have Dell XPS L502X I have installed SSD of kingstone 120 gb After that i have i have installed ubutu 16.04 and my battery drain very fast at 100% charging work 1 hour and 13 minutes while in ...
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0answers
29 views

How to disable Bluetooth devices from turning off due to inactivity in 14.04

I am fairly new to Ubuntu. I know in Windows OS you can disable Bluetooth power management, which disables the devices from turning off/going to sleep. I would like to disable that for Ubuntu 14.04 ...
0
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1answer
221 views

Kernel build 4.4.0.22 decreases battery life (16.04 LTS)

My battery life was fine when I installed 16.04 LTS (clean install) on my Lenovo z51-70, but after a regular software update or build to kernel, from 4.4.0.21 to 4.4.0.22, it has almost halved (1.50 ...
0
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1answer
102 views

How to configure power managment with tlp?

I have a similar issue like this user, that is my hard drive overheats. I'm running Ubuntu MATE 15.10, which has tlp, and I've read that they should not be installed together. So is there a way to ...
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0answers
23 views

Power Failure on Software RAID 10: is automatic resync enough?

I had a power failure on a server (Ubuntu 12.04.3 LTS ) with a raid 10 array. When I restored the power, in dmesg there was the message: md/raid1:md1: not clean -- starting background reconstruction ...
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41 views

Authenticate to suspend?

Fresh install of LUbuntu 16.04 on a Compaq CQ58 (El cheapo AMD C60 laptop from Wal*Mart, bought on Black Friday 2012.) I walk away from it and it's supposed to suspend. I come back to an ...
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2answers
572 views

Laptop won't suspend on 16.04 (Kernel 4.4.8)

So I had Kubuntu 16.04 which had been upgraded from 15.10. Always worked fine and slept when I closed the lid. I installed Ubuntu (switched from Kubuntu) (clean install, formatted root partition) 16....
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0answers
23 views

Restrict waking up from suspend to specific buttons only

I have an Acer Aspire notebook with 16.04 installed on it. Currently when I suspend, it wakes up on basically everything, including: opening the lid pressing the Power button pressing any keyboard ...
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0answers
86 views

HP Probook 450 G3 does not suspend when lid is closed on ubuntu 16.04 [duplicate]

I have a small problem - my laptop does not suspend when the lid is closed. This only occurs on ubuntu 16.04. On previous versions of Ubuntu the suspend function worked fine. The power settings are ...
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0answers
128 views

Ubuntu 16.04 Won't Power Off

I own Asus E402S Laptop, and it's not shutting down. It only stays at the "Ubuntu" logo. I've tried this link for solution. 00:00.0 Host bridge: Intel Corporation Braswell SoC Transaction Router (...
1
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3answers
229 views

In Ubuntu 16.04, which ACPI Global State does Suspend result in?

I have read the post on "What is suspend". However, I would like to know exactly which ACPI Global State does pressing the Suspend button lead to. Can someone explain this? Specifically, how do I ...
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0answers
271 views

Lenovo z50-70 “dust removal” (reverse fan) on Energy Manager with Ubuntu?

I have a Lenovo z50-70 and under Windows 8.1 and Windows 10 I had the "Lenovo Energy Manager" software with a "dust removal" function, that basically made the fan turns backwards to shoot the dust ...
0
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1answer
43 views

Running xfce4-power-manager as daemon with ubuntu 14.04 and awesome

I'm running default ubuntu 14.04 in combination with awesome WM 3.5.9. To enable proper suspend when I close my laptop lid I enable xfce4 after login through the following awesome command which makes ...
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0answers
54 views

Ubuntu Touch - setting the low battery warning level and behavior?

I had always assumed that if a battery is full, and a smartphone is connected to a charger, then the phone would simply disconnect power from the battery charging circuit once the battery is full, and ...
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0answers
33 views

Thinkpad T410S Suspend Problem

I recently bought an old Thinkpad T410S and everything was fine until recently occured a problem with suspend. When I press Fn+F4 (suspend button), laptop turns off screen, but do not suspend and ...
0
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1answer
59 views

How to set hard drive spindown while plugged into AC power on Ubuntu Server 16.04

I have created a personal file server running Ubuntu server. My only problem is figuring out how to have its hard drive spin down after x minutes. I managed to read the 20hdparm file and it states it ...
0
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0answers
44 views

Install perf at 4.5.2 kernel

Does perf affect battery life? At 4.5.2 kernel stable in 16.04 LTS the TLP output states: /sys/devices/system/cpu/intel_pstate/min_perf_pct = 18 /sys/devices/system/cpu/intel_pstate/...
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0answers
201 views

how to setup cpupower at boot time in Ubuntu 16.04?

Ubuntu users! I have a Intel computer running basically as a HTPC machine for years 24/7 and at a certain point in time the Linux kernel started to use the intel_pstate driver for my i7 Ivy Bridge (I ...
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0answers
17 views

How to install power utility?

When I shut my laptop screen, and again when I open it, there's nothing on screen. Again I have to press the power button and start Ubuntu again. What should I do?
0
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1answer
348 views

How to change Power-Button to Suspend in 16.04?

I know the answer here about How do I modify the options for the power button? However, the dconf-editor is completely different than in previous versions. There is no Settings-daemon. It looks like ...
2
votes
2answers
456 views

Poorer battery life after kernel upgrade: 4.5.2 (16.04 LTS)

When I first installed 16.04 LTS, at kernel 4.4.0, I had a decent battery life of about 3 hours average, but I upgraded to 4.5.2 to solve the suspend problem and some other issues, and now it's less ...
2
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0answers
44 views

How to prevent sleep/keep screen on when on USB power for Ubuntu Touch devices?

On Android devices, there is an option Settings > Developer Options > Stay awake when charging which keeps the device ON (prevents sleep) even if the device is not touched, when the device is ...
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0answers
36 views

Ubuntu 14.04 - Battery charging issues

My problem is that the battery won't charge. In the last few days I've noticed that my PC recognizes that I've put my AC adapter and starts the charging animation in the upper right corner off the ...
2
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0answers
47 views

Session closed instead of shutdown

Shutdown from taskbar, but instead session is closed. Why? I have to "poweroff" in terminal. Desktop computer running Ubuntu 16.04, recently upgraded from 15.10 (not sure, but I believe also ...
1
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2answers
48 views

How to shutdown system if not charging

I am using Ubuntu 14.04 LTS. My battery is not working, i.e. it provides backup for around 5 minutes. Now when I download stuff, it sometimes takes around 5 - 6 hours. And I can't just hang around the ...
0
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0answers
31 views

putting a battery status icon into my stalone

I'm running Trusty-tahr using fvwm, so I don't automatically get access to the battery status icon that's available in the standard ubuntu desktop manager. I'd like to put the standard icon into my ...