Tagged Questions

Questions related to power management, particularly power saving measures.

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1
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0answers
248 views

Lenovo x1 carbon (gen1) battery life

I'm using an Lenovo x1 carbon (gen1) and have Ubuntu 14.04 and tlp installed. I'm really dissapointed about the battery life. Some people claim to have 6 hours ...
0
votes
1answer
92 views

How to set Ubuntu with Cinnamon to hibernate when lid is closed with external monitor?

If I have external monitor attached, closing lid won't hibernate my computer. In normal Ubuntu I could edit this in power settings but how could I set set my Ubuntu with Cinnamon to do this?
0
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0answers
24 views

How to disable Suspend and Hibernate functions? [duplicate]

I don't use neither suspend nor hibernate PC function at all. I do only shutdown and reboot. However it comes into my way sometimes, i.e. when I accidentally click on "Suspend" instead of "Shutdown" ...
1
vote
0answers
209 views

Black screen on resume after suspend, pm_test is fine [closed]

I'm using Ubuntu 14.04 on a Lenovo IdeaPad S205. When I resume from suspend-to-RAM, fan goes on but screen stays off. The computer does not respond to anything except a hard shutdown (press and hold ...
1
vote
0answers
84 views

Battery drain and over heating on Dell XPS L502X

I own a Dell XPS L502X and it works fine if is booted under "Windows 7". No issue(over-heat or quick-battery-drain) is observed while using the laptop. After the recent installation of Ubuntu ...
1
vote
4answers
1k views

Low battery life in Ubuntu 14.04

I did a clean install of Ubuntu 14.04, along dual booting Windows 7. I love Ubuntu but then suddenly the power went out and the next thing I know my battery ran out of juice in less than 30 ...
1
vote
0answers
72 views

Fan not working increasing CPU temperature

I have Dell Vostro 1014 laptop. I am using Ubuntu 12.04 LTS. The fan of my laptop is not working anymore and increases the CPU temperature upto 85 degree Celsius. I followed the solution given on this ...
3
votes
2answers
64 views

How to enable power failure notification?

I need to enable power(A/C) failure (off-line) and power on (on-line) notifications, like this notification I searched and tried to do that but i didn't find any successful articles. i use this ...
2
votes
1answer
172 views

How to disable the feature of automatic system shutdown in 60 seconds?

After pressing the physical power button on computer it's shown a 60 second countdown dialogue box: "This system will be automatically shutdown in 60 seconds" How can I disable this feature? The ...
0
votes
1answer
222 views

Power Button shutdown permission override

I realise there are several questions about Power Button options, but this is a little different. On my system, shared with my family, I have disabled shutdown from the device menu, users may only ...
2
votes
0answers
50 views

hp xw4200 fan speed

I just installed Ubuntu 14.04 on my old HP xw4200 workstation (p4 3.4 GHz, 3 GB of RAM, Ati FireGL 5200). The install worked without any issue and the system seems responsive. The problem is that ...
1
vote
1answer
67 views

Blinking moon of death since SSD upgrade on standby [closed]

I own a Lenovo SL510 (4G RAM) and I just upgraded it with a Samsung 840 Evo 120G. Previously I was using Ubuntu. Later on I switched to Linux Mint Nadia. At the very beginning (Ubuntu 10.10 I guess) ...
3
votes
1answer
453 views

Lubuntu 14.04: Cannot start Power Manager

I recently installed the Lubuntu Desktop and I can't start the Power Manager. It returns the question: Xfce4 Power Manager is not running, do you want to launch it now? but when I click Run, it ...
1
vote
0answers
58 views

Why the suspend is not even close to consuming 0 power? [closed]

Out of curiosity, I've measured power consumption of my computer on various states/loads. And guess what, suspend is not that energy saving as you may guess! It's far from claimed 0 or nearly 0 power ...
0
votes
0answers
84 views

Suspend fails to go to sleep

I have an Asus Zenbook Prime model ux-32A with kubuntu 14.04 and the suspend command does not actually suspends. when hit (either stop button or pm-suspend command) nothing happens. Below is the ...
1
vote
1answer
109 views

brightness not dimming on battery [duplicate]

On my Lenovo Yoga Pad 2 with Ubuntu 14.04 there is no option to dim the screen when in battery mode. There is one option "Dim screen to save power" but it doesn't seem to have any effect: How can ...
0
votes
0answers
88 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 ...
0
votes
1answer
256 views

Plugged in, battery not charging, not running down

This morning, after being plugged in all night, my Asus N550J, Xubuntu Saucy, showed 28% battery. When it is plugged in, it shows the Charging icon, yet the percent charge never goes up. When it is ...
1
vote
2answers
41 views

Power settings location?

I have Xubuntu 14.04 and I am running it on an EeePC. Where in the world are my power settings? I've looked everywhere. I found this in my files, but I don't know how to open/use/install it. ...
1
vote
0answers
69 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 ...
1
vote
0answers
79 views

What disadvantages come with using TLP?

I use Ubuntu on desktops and laptops and am making a custom script to set things up for my school. I just discovered TLP to improve power comsumption for the laptops and want to include it in my ...
2
votes
1answer
462 views

Docky: crash when plug/unplug power cable

Docky keeps on crashing every time I plug in or unplug the AC cable. I tried solving the problem following the instructions on this website. It worked fine for the suspend crash but when I try the ...
-1
votes
2answers
532 views

Cannot shut down Ubuntu 14.04 [duplicate]

this is my first time using Ubuntu 14.04 version. I'm not sure what I've done, but I can't shut down my laptop. But if I log in as the guest, then it will shut down if I press the button and I'm not ...
0
votes
0answers
40 views

Hotkey Fail After Suspend

Problem The hotkeys are Lenovo Thinkpad E440's Functions hotkeys (Fn+Any F). It works normally when PC turned on. It goes to a problem when I do sudo pm-suspend command. After suspended and resumed, ...
1
vote
0answers
53 views

Is There a Way to Force Lid State to Open

My Lenovo X1 Carbon Laptop with Ubuntu 14.04 has a problem where the screen and keyboard stopped working. It does work if I use an external monitor and keyboard. I think the reason for this is that ...
-1
votes
1answer
292 views

overheating when using ubuntu14.04

I installed ubuntu 14.04 in my asus intel i5 laptop. The laptop is heating up to a high temperature quickly which I never seen when using the windows. Can anybody give a solution?
1
vote
0answers
67 views

How can I change power settings automatically while running VLC in Xubuntu 14.04 64 bit

I am using Xubuntu 14.04 64 bit. I usually play video using VLC media player. The problem I am having is, after 10 or 15 minutes computer turn off its display, even the video is running in the ...
1
vote
0answers
44 views

During halt system hibernates on lid closed

I use xubuntu 14.04 64bit on Lenovo g510. I disabled hibernation on lid closed in xfce power manager. On lid closed: do nothing. It works. I can close and open the lid and system is not ...
0
votes
0answers
76 views

Diagnose complete system hang 12.04 dell xps 13

I occasionally have a complete system hang on my Dell XPS 13 Developer Edition laptop (the one that comes with Ubuntu pre-installed). There's complete system unresponsiveness, CPU seems to go to 100% ...
0
votes
0answers
86 views

Turn off screen when inactive ONLY on battery power

In the "Brightness and Lock" settings there is a nice feature to automatically turn off the screen after a period of inactivity, but I only want to do this on battery power. When plugged in, I always ...
1
vote
1answer
485 views

How to improve battery life on Samsung 13.3” Series 7 Ultra (NP730U3E-S01AU)?

Recently I've bought a Series 7 Ultra Samsung ultrabook and decided to change the OS from originally installed Windows 8 to Ubuntu 14.04LTS. However, it's difficult not to notice great decrease in ...
1
vote
0answers
154 views

Toshiba resume automatically after suspending in Ubuntu 14.04

I have a Toshiba L845 and i when i suspend ubuntu it wake up 2 seconds later. Here you are some info. cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic.efi.signed ...
3
votes
0answers
129 views

Laptop battery always discharging

I have a fully up to date Ubuntu 14.04 on my Asus X550DP laptop. My problem is that the battery is always discharging. When I plug the AC adapter in, it charges battery up to around 96% and stops ...
0
votes
0answers
32 views

problems with my laptop when I turn machine

I've recently connect my laptop on another place in my house. When my laptop is booting, I saw this message: i915_bdw:exports duplicate symbol i915_release_power_well (owned by i915) hda_intel Error ...
1
vote
2answers
257 views

Asus UX31 ultrabook suddenly shuts down when below 50% battery

I've heard over the years that this computer had issues with the BIOS settings but that by 13.10 it had been cleared. It never used to happen on 13.10 but now that I'm on 14.04 it started showing ...
0
votes
2answers
514 views

Battery Power when running Ubuntu 14.04 LTS in dual boot

This is only a general question in order for me to get a better idea of my dual boot (windows 8 & Ubuntu) systems. I noticed that every time I run Ubuntu (which is becoming more often) the ...
1
vote
2answers
985 views

overheating and battery drain MacBook pro

I have just installed ubuntu Gnome 14.04 in a Macbook Pro 13" mid 2012, and I have some problems with my laptop. I have already installed TLP and macfanctld, but my MacBook still have the problem, ...
15
votes
1answer
369 views

What actions does Ubuntu trigger when battery is low?

When the battery is low, the screen gets dimmed after a few seconds already. This appears to be some special power-saving mode, and might be related to the time in ...
0
votes
1answer
179 views

Power off bluetooth: the LED indicator is still ON, is the radio module turned off?

I would like to have a Bluetooth adapter powered off at the startup, but at the same time to be able to turn it on when I need it. I have found this advice: Add rfkill block bluetooth into ...
0
votes
0answers
183 views

Weird behavior after upgrading to kernel 3.13.0-29 generic (3.13.0-29.53)

I'm already aware of another weird behavior which is if I time my laptop to shutdown while the lid is closed, if I try to boot it up again after its shutdown, it looks like its starting up and ...
1
vote
0answers
116 views

Laptop goes to sleep right after boot with lid closed and external monitor connected

The issue is following: laptop (HP6570p) with Kubuntu 14.04 installed, lid closed, external monitor is connected. Reboot. Laptop shows KDM login screen for a seconds and immediately goes to sleep. ...
10
votes
2answers
4k views

Does Ubuntu Touch consume less power than Android? [closed]

One of the problems of new OSs is power consumption. That is because power and performance requires a lot of tweaks and experience with the kernel, drivers and OS code-base on one hand, and a lot of ...
1
vote
1answer
524 views

xset: unable to open display

for the longest time after about 5 minutes my screen would blank out. Now the screen will go blank after 5 minutes but then 2 seconds after that it will light up white and keep the laptop ...
0
votes
0answers
82 views

Modify power / sleep setting via command line SSH

I want to change the power management sleep via SSH for a logged in user I set the value sudo -u user dbus-launch --exit-with-session gsettings set org.gnome.settings-daemon.plugins.power ...
2
votes
2answers
64 views

How to simulate closing the lid?

I have probem with my laptops monitor. When I move my laptop, sometimes screen goes white, blank. Then I have to open and close lid. It is very annoying because when I open it its moves and turn white ...
0
votes
0answers
36 views

Lubuntu resumes from standby half a second after going to sleep

So, I installed Lubuntu 13.10 on a Toshiba Satellite C855D-S5900, then I upgraded to 14.04. Whenever I tell it to sleep, or when the xfce4-power-manager tells it to sleep, it does so for about half a ...
0
votes
2answers
79 views

Broken package ubuntuone-control-panel-qt

An interrupted installation of updates resulted in ubuntuone-control-panel-qt breaking and now I cannot install or update anything. There seems to be an error in python2.7 - ImportError: No module ...
3
votes
1answer
186 views

Run a Script when Power Button is Pushed

I'm trying to run a script once I push the power button instead of having my machine turn off. I'm running Ubuntu Server 13.04, but any answers also need to work on Server 14.04. I've looked at ACPI ...
0
votes
1answer
37 views

Permanently end processes

The point is that i installed xubuntu and at one point i get on the screen one light bulb increasing and decreasing the light on the display (laptop) so i found in task manager that it is this ...
0
votes
1answer
144 views

The fans are noisy

I have an ASUS laptop that works fine: fast, no overheating etc. My problem is that the fans always run. I find this very annoying because in a silent room they are really loud How can I control ...