Questions related to power management, particularly power saving measures.

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5
votes
0answers
173 views

Prevent gnome power manager from showing keyboard battery

My gnome toolbar shows a battery indicator which is always wrong. I recently figured out why; as when clicked it shows both my internal battery status and my keyboard status as two separate items: ...
5
votes
0answers
2k views

How to disable automatic brightness adjustment in Ubuntu 14.04?

I am running Ubuntu 14.04 LTS on a Dell 3542 laptop. My problem is that screen brightness changes depending on content. I think this is called automatic (or dynamic) brightness adjustment, as I stated ...
5
votes
0answers
928 views

How to control of battery charging/discharging limits?

I'm running HP 530 laptop and Ubuntu 10.04. My old battery is died some times ago, so I have got the new one. I'd like to get possibility to change the limits when the charger starts to charge ...
4
votes
0answers
56 views

indicator-power status change delay

I recently migrated to 64 Bit 16.04 LTS from 32 Bit 14.04 LTS on my Toshiba L645 laptop. I am facing an issue with power indicator on the unity panel. When I change the power source to battery from AC,...
4
votes
0answers
485 views

Battery status not refreshing

It was working fine, but after upgrading Unity to last version, it is not refreshing anymore. The percentage and charging status remains on what it was on system startup. acpi command in terminal, and ...
4
votes
0answers
609 views

Lubuntu - xfce4-power-manager alternative

Can I uninstall xfce4-power-manager and set my suspend settings somewhere else? How would I be able to check my battery status? I would like to get rid of xfce4-power-manager because of my problems ...
3
votes
0answers
23 views

Battery Use Grouped By Application

Is there a way (other than powertop) I can see how much of my laptop battery's charge was used for each application over the current discharge cycle similar to how Android Marshmallow does?
3
votes
0answers
39 views

Ubuntu 16.04 failing to suspend and opening applications by itself

I have a very strange problem. After installing stock Ubuntu 16.04, I noticed that whenever I close the lip on my laptop and come back a few hours later, every application (on the launcher) is running ...
3
votes
0answers
76 views

Laptop dying during suspend after 2 hours. Suspend/hybrid not working

So I have a yoga s1 and recently installed ubuntu. Twice now when I close the lid and go into suspend the computer will rapidly drain power from the battery in the span of 2 hours then die shortly ...
3
votes
0answers
19 views

How to play sound before suspending laptop?

How do you configure Ubuntu 14.04 to play a short sound just before it suspends? I bought a laptop which I later found had no visible status LEDs when the lid was closed. On past laptops, I've had ...
3
votes
0answers
108 views

Why does my computer try to shut down when I plug in headphones?

Using Ubuntu 14.04LTS. Noticed that when I plug in headphones, a menu appears asking if I want to "lock, suspend, restart, or shut down." Is this normal? How do I fix this if it isn't normal?
3
votes
0answers
253 views

Laptop doesn't suspend when lid is closed - No state change

I have a problem about my laptop that doesn't suspend when i close lid. First the story. I bought a new Acer e3-112. It camed with win8.1 and i upgraded it to win10. Then i shrinked the hdd and ...
3
votes
0answers
206 views

Battery indicator disappears on connecting the power

I removed Unity and installed Gnome on Ubuntu 14.04. Now the battery indicator disappears on connecting power. The indicator-power-service appears to be there but it isn't working. On running it from ...
3
votes
0answers
351 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 ...
3
votes
0answers
2k views

How can I set a different screen timeout time when on battery than if I am plugged in?

Currently, Ubuntu 14.04 only provides a single option: "Turn screen off when inactive for: x minutes" that applies regardless of whether my laptop is plugged in or not. I want to change this setting ...
3
votes
0answers
864 views

Disabling suspend/sleep/hibernate on a headless Xubuntu

I'm running Xubuntu 13.10 headless via ssh and tmux. Whenever I leave the machine, making sure to have a tmux session opened, it will invariably crash after about an hour. The sign it has crashed is ...
3
votes
0answers
366 views

Ubuntu restarts on shutdown/hibernation commands, instead of shutdown

Friends, Whenever I am going to shutdown/hibernate my Ubuntu PC its restarting after completing their process. Mean to say if press shutdown button its shutdown properly and switch off the display but ...
3
votes
0answers
492 views

Secondary battery not found?

I've got a Asus TX300 running Ubuntu 13.04. This is a laptop tablet hybrid which has secondary battery in the dock. This battery is not detected by Ubuntu as far as I can see. Ran this while docked: ...
3
votes
0answers
201 views

How to tell if laptop was woken by rtc?

Say I set my laptop to wake every morning with rtcwake (e.g. echo $(date +%s 'tomorrow 08:00') > /sys/class/rtc/rtc0/wakealarm in a cron job or in /etc/pm/sleep.d/99-set-alarm.sh). Now, I'd like ...
3
votes
0answers
324 views

xfce4-power-manager keeps restarting after suspend

In a clean install of Xubuntu 12.04, the xfce4-power-manager keeps restarting after suspend. If i quit the program and restart it, it keeps restarting. If i quit the program and restartit a few ...
2
votes
0answers
40 views

How to enable “sleep after x minutes of inactivity” on Ubuntu Server 16.04 without third party software?

So how do I know it's not working? Well on my MacPro, I set it to go to sleep after 15 minutes of inactivity. The monitor turns off and then the fans and all lights turns off. This doesn't happen on ...
2
votes
0answers
69 views

How to force powersave to a slower CPU speed on ubuntu 16.04

I have a system76 laptop running ubuntu 16.04 the fan constantly comes on unless it's on powersave mode and the cpu MHZ is running around 1000hz. The issue is the powersave mode doesn't always take ...
2
votes
0answers
41 views

Laptop doesn't suspend after closing lid

None of the solutions on here have worked for me. Recently I've installed Lubuntu. I'm getting used to DE (switched from GNOME), however, I have a problem with the power management (Lubuntu uses xfce4 ...
2
votes
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 ...
2
votes
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 ...
2
votes
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?
2
votes
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 ...
2
votes
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 ...
2
votes
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 ...
2
votes
0answers
209 views

Problem shutting down or restarting after suspend.16.04

Yesterday I noticed when I went to restart my laptop, it wouldn't. The computer is a brand new Dell XPS 13 9350. After looking into some things I noticed that it would only happen (Not shutting down) ...
2
votes
0answers
75 views

Power Suspend inconsistently working

I have a Ubuntu 14.04 desktop. I rely on the power suspend to suspend my system when I am inactive for longer than 30 minutes. For some reason, this doesn't always work. I came to my system ...
2
votes
0answers
67 views

Is there any GUI for Intel P-state fine-tuning?

I like using indicator-cpufreq, but I'd also like to use Intel P-state, as it sound like promising. The problem is, you can't really control it's behavior. I've tested it a lot and came to conclusion ...
2
votes
0answers
293 views

15.10 - Ubuntu does not power off on shutdown

I have been around the internet trying to find the answer and no solution given has worked. I have disabled quiet and splash from /etc/default/grub so I can see the output. When shutting down, there ...
2
votes
0answers
162 views

Laptop instantly wakes from sleep/suspend when battery is low

I have an EliteBook 2570p with Ubuntu GNOME 15.04 installed. When the battery is low I can suspend the computer or put it to sleep, but it wakes up right away. For example, sometimes I am working on ...
2
votes
0answers
47 views

Disconnect a laptop charger in software?

Short of the question: Are there any particular mechanisms to temporarily switch the charger input on a laptop on or off in software? In particular I am looking at a Dell Inspiron E1505 in my case. ...
2
votes
0answers
38 views

How can I execute a script when my laptop failed to suspend

My laptop occasionally fails to suspend, resulting in it burning up it's battery (and sometimes getting roasty-toasty in my bag). In dmesg I usually see this entry: PM: Some devices failed to ...
2
votes
0answers
92 views

Ubuntu 14.04 turns off after unplugging the charger

I have problem with my Ubuntu 14.04. Every time I unplug the charger, the system is shutting down. It occurs only, when the charger is unplugged from computer, but not when unplugged from the power ...
2
votes
0answers
163 views

Gnome 3.14.4 won't blank the screen / suspend the system due to inactivity

I installed gnome-shell and ubuntu-gnome-desktop on top of Ubuntu and now the automatic suspension doesn't seem to work (I've been using GNOME now for some time and I'm not 100% sure if it worked at ...
2
votes
0answers
504 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 ...
2
votes
0answers
597 views

Card reader draining power on MacBook running 14.04

I'm using 14.04 on a MacBook Air 5,2 (mid 2012, 13"). I just recently noticed powertop listing the built-in card reader to drain massive amounts of power: Power est. Usage Device name 6.68 W ...
2
votes
0answers
65 views

Ubuntu still shuts down after I plugged my charger in

On Kubuntu when my battery is dying and I plug my charger in, it says "All suspensions have been cancelled." On Ubuntu or more accurately, Unity-based distors, it still shuts down after plug in my ...
2
votes
0answers
306 views

Battery Icon does not work properly for dual batteries

I have two batteries for my laptop, one is the built-in battery and the other comes from keyboard (X1 Helix if you want to know how that works). The way it works is: laptop draws power from bat1(...
2
votes
0answers
59 views

Determine which device resumed PC from suspend

I'm running Ubuntu 13.10 as a HTPC and have configuring the PC to resume from suspend in order to record scheduled live TV programs. This part works fine. What I want to do now is determine what ...
2
votes
0answers
511 views

Prevent resume from suspend on lid open for 14.04

I'm running Ubuntu 14.04 on an Asus n550jv. I had this problem in 13.10 also. I want to disable resume-from-suspend when the laptop lid is opened. The traditional answers to this involve echo "LID" &...
2
votes
0answers
130 views

Hack Battery Preference for Gnome 2 MATE on Ubuntu 13.10

I am using Ubuntu 13.10 on my 32-bit computer. However, I missed the Gnome Desktop Environment so I installed MATE 2. I have encountered a problem with the battery preferences. I don't want to put ...
2
votes
0answers
119 views

How to temporarily disable Xfce monitor power off via bash

I have set up my monitor to go off after some minutes of inactivity, but when watching an internet stream in a browser this is unwanted, thus I'd like to have bash command that to disable (and later ...
2
votes
0answers
728 views

fglrx and the broken atieventsd daemon (+maybe improve your battery life for AMD card owners)

I've been playing about with these things lately, and discovered a couple of things about the fglrx driver on Ubuntu that I thought worth sharing in the context of a broader question. The atieventsd ...
2
votes
0answers
1k views

Very long shutdown delay on 13.10

Whenever I shutdown or reboot, there is a very long delay (several minutes) before the system will shutdown. I was getting a nm-dispatch signal 15 so I thought the problem might be with network ...
2
votes
0answers
177 views

Simulate AC Power Plug/Unplug

can someone tell me how can I simulate AC power plug/unplug in Ubuntu 13.10? I would like to create a script, that do something when AC power is plugged/unplugged, but is really annoying to plug/...
2
votes
0answers
577 views

Battery indicator stuck at 98% percentage

Ubuntu 13.10 64-bit, used to work fine but lately battery applet with percentage says 98% at boot but doesn't drain (though obviously battery is draining). How can I reboot the applet/make it work ...