Questions related to power management, particularly power saving measures.

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Ubuntu won't start after closing laptop lid

I am running Ubuntu 14.04 LTS on a Dell latitude e6430 laptop. Whenever I close my laptop lid or sometimes when I lock the screen before shutting the lid, when I open the lid again Ubuntu won't pull ...
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1answer
107 views

Critical battery action gracefully shutdowns instead of hibernating

Running Ubuntu 14.04LTS. Enabled hibernation and manually tested pm-hibernate successfully. I updated the values in the gnome power manager i.e. org.gnome.settings-daemon.plugins.power ...
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14 views

Cycle monitor power on Suspend/Resume

I'm trying to find a way to get my Ubuntu desktop to automatically turn off my monitor (actually a Sceptre TV) when it suspends, and automatically turn back on when it wakes. They are hooked up via ...
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0answers
41 views

Acquiring a wake lock

How do i aquire a wakelock on ubuntu phone? i tried with the usual android method: echo something > /sys/power/wake_lock but i get: -bash: /sys/power/wake_lock: Permission denied any help?
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55 views

USB wakeup does not work when lid is closed

I have a dell xps 13 9333 with ubuntu 14.04.3 LTS. I'm using this as a desktop computer, with an external monitor and USB keyboard. The system is configured to 'Do Nothing' when lid is closed (see ...
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108 views

Disable wifi power management

Problems: 1) Power management makes Wifi connection unstable. I need to disable it completely 2) My wifi doesn't automatically turns on after sleep. I should do it myself Info Laptop: Dell ...
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1answer
179 views

How do I set battery charging thresholds

I am new to Ubuntu and I don't speak computerese. I really don't! I have read the various threads on the topic and still can't work it out. I have recently purchased a Lenovo Thinkpad x250 and I ...
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1answer
107 views

Battery drains out in 24 mins (Ubuntu 14.04 on Lenovo Thinkpad x201i)

Hardinfo Extract | Battery -Battery: BAT0- State : charging (load: 186 mA) Capacity : 610 mAh / 5600 mAh (10.89%) Battery Technology : rechargeable (LION) Model Number : ...
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1answer
35 views

Poor Battery due to WiFI Intel 7260 Ubuntu 14.04

I am using a Lenovo T440 laptop, which has an Intel Dual Band Wireless-AC 7260 WiFi card. According to PowerTOP, the card is using about 9.5W power while the rest of the system uses less than a fifth ...
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0answers
66 views

Run *ONLY* `/etc/acpi/powerbtn.sh` when power-button pressed, and not *ANYTHING* additional

I want to run a custom script when the power-button is pressed. For a simple test, I put only a single line in /etc/acpi/powerbtn.sh. That line creates a file it_ran.txt in my home folder. There is ...
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0answers
11 views

Screen blank as soon as I stop moving mouse/keyboard

I just upgraded to Wily, and I'm having a strange issue. My screen is blanking (entering power savings mode), literally, within seconds after I stop moving the mouse or touching keys on the keyboard. ...
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1answer
33 views

Resume from Suspend closes applications

Just loaded Ubuntu 15.10 on my old HP E1 Vision and am very pleased with it. I have a minor issue in that if I Suspend using the power icon in the upper right corner of the screen, close the lid and ...
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0answers
21 views

how to enable(swith-on) usb-power in ununtu?

I am using sony vaio laptop , intel i5 processor which give me facility to charge my phone through one usb 3.0 port of my laptop even while my laptop is powered off. In windows sony vaio manager give ...
0
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1answer
96 views

Inspiron not waking up after lid open (Trusty)

I've installed Trusty (14.04.3 LTS) on a brand-new Dell Inspiron 13 (7000 series). Everything else seems to be working well, except that the laptop does not wake up after Suspend on opening the lid ...
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1answer
60 views

Keyboard of Acer Aspire A5943G not working properly

I have an Acer Aspire A5943G laptop, and its keyboard is not working properly. The keys SDGHM and some shift combinations produce either no characters at all, or just sometimes with wrong delay and ...
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0answers
47 views

Occasional Macbook pro suspend failure when closing the lid

I'm running Ubuntu 14.04 on a 2012 Macbook Pro, and every now and then when I close the lid, instead of suspending like it usually does (and corresponding to what I have set in settings), the screen ...
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0answers
46 views

/etc/pm/power.d settings ignored in kubuntu 15.10

I'm trying to improve power consumption in my laptop. I've took the suggestions from the awesome powertop utility, and put them in a script called: /etc/pm/power.d/10evert When I manually run the ...
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1answer
94 views

Wierd Lid close/open and suspend problem

I have an old Thinkpad W510. The pm-suspend works, the lid close then suspend does not. After some searching, I found the following solution. create /etc/acpi/events/lid (there's no lid related ...
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1answer
169 views

Set i915 to low-power /Reduce thermal throttling

Samsung NP550P5C S02 i5-3210M GT 650M Ubuntu 14.04 Gaming (especially in wine) and bumblebee/primusrun severly degrade performance after a few minutes due to powerclamp throttling! This is extremely ...
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2answers
844 views

Fan is constantly running after 15.10 update

Updated to Kubuntu 15.10, after that the fan is running constantly. I've installed tlp, fancontrol, etc. Sensors show a CPU temperature of only 50°C. I've got a GT620M but run the offical nvidia ...
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100 views

New battery is stuck at 72%, says it is charging, but unplugging the charger will shutdown the computer

I just bought a battery for my Alienware M14x r2 laptop. It is a 1 x 8 Cell. I plugged it into my laptop, and the percentage automatically showed 72%, and charging. The charging percentage has not ...
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61 views

how do i unrestrict battery charge percent on a lenovo running ubuntu

i recently bought a Lenovo z51, and later used the battery management program that came with it to reduce the max charge to 60% i have since than installed Ubuntu 14.04 and uninstalled windows. i now ...
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0answers
35 views

After installation of TLP I have notice a increase of 5 up to 7 seconds on boot in xubuntu

I have intalled TLP on xubuntu and I notice a increase of time btw 5 up to 7 seconds on boot time according dmesg output and I have now some ACPI Warnings on boot, I'm attaching my dmesg output and my ...
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1answer
89 views

Locate power-hungry USB device seen in powertop

The battery life on my Dell XPS 13, while never great, has gotten seriously bad lately. Using powertop, I've noticed that there seems to be some sort of USB device drawing quite a bit of power. ...
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25 views

Notebook starts when plugged in, no power button needed

One week ago my notebook (Dell inspiron 640m) starts as soon as I plugged in to electricity or I insert the battery. I do not need to push the power button. This is not a normal turn on, in fact it ...
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0answers
22 views

Screen isn't locked when going to hibernate in Lubuntu 14.04

My '''Lubuntu 14.04.3 LTS''' offers me a ''Power Management'' dialog in the settings. The title of that window is "PowerManagment for XFCE" (not lxde!). In there I enabled "Lock screen when ...
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2answers
92 views

How can one force the laptop batteries to charge beyond their recognized limits?

My thinkpad has two batteries delivering approximately 200Wh. However the main battery is aging a little, losing its capacity, or so the battery is telling me. What I wish to accomplish is to ...
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0answers
79 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 ...
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0answers
34 views

Possibility to Limit Processor Utilization by %?

This question refers to the feature in Windows Power Settings that has 2 options: Minimum processor utilization: 0% Maximum processor utilization: 100% Since the default Power Options in Ubuntu ...
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0answers
15 views

Sleep buton no longer works on U12.04

I had and still have setting to show pop-up window when sleep button on my keyboard is pressed: gsettings get org.gnome.settings-daemon.plugins.power button-suspend = 'interactive' gsettings get ...
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0answers
62 views

Nothing happens when I close the lid or press power button

I just installed on Ubuntu 14.04.3 on my laptop (Lenovo Thinkpad X230). Everything works fine except: closing the lid pressing power button while the computer is on does nothing, even though I ...
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0answers
74 views

How to disable EEE in TG3 Driver (disable energy efficiency ethernet)?

I can easily set the eee to off (0) by using ethtools, but it doesn't stay disabled after a reboot - how do I make it permanent? Do I have to rebuild the driver with the EEE flag?
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37 views

My ubuntu not powering off version 14.04 hp laptop

I am having hp laptop. i installed Ubuntu 14.04. The problem is it is not shutting down. i need to press power button to shut down. i tried almost all steps like changing /etc/default/grub, installing ...
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0answers
55 views

Laptop will not hibernate when battery is critical

My laptop does not hibernate when the battery is critical. I tried the suggestions in several posts with related or similar titles. These included ensuring that pm-hibernate works modifying the ...
1
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1answer
87 views

Can't disable power management in Kubuntu 15.04 Desktop

I'm having trouble with my Kubuntu 15.04 (Plasma 5) installation. I'm running it on my desktop, so I don't have a battery, only AC. The problem is, that Kubuntu locks the screen after about 15 ...
0
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1answer
162 views

Nothing happens when I close my laptop lid or press the power button (Kubuntu 14.04.3, Thinkpad X250)

I'm on Kubuntu 14.04.3 on a ThinkPad X250. I tried to configure what happens when I close my laptop lid or when I press my power button in the "Configure Energy Saving" dialog in the "System ...
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0answers
38 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. ...
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0answers
42 views

How to enable password request after hibernate | Ubuntu 14.04

1: I do not see the hibernate option in my power menu, I do see hibernate in my login screen power options but not when I log in (NB: pm-hibernate works flawlessly). I have edited ...
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0answers
71 views

How to restart Ubuntu box (14/15) on power loss, after after soft shutdown via 'apcupsd'?

Hello Ubuntu community - I've searched the forums, and scoured the internet, without resolution to this issue. I'm running Ubuntu 15.10 (formerly 14) on an Intel NUC (5i), connected to a Back-UPS ...
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0answers
22 views

sleep when power off, wake when power on

I have an old laptop and I want to use it as local server Battery is working, and I wonder if it possible to put laptop computer to sleep when power is off and wake it back in when power is on ? ...
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0answers
25 views

Dual display. Software dimming

I got a difficult question. I have a dual display setup. I sometimes watch a movie from the left screen and always have to reach for the power button to shutdown the right display during the movie. Is ...
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0answers
30 views

MAAS ubuntu 14.04 on Cisco UCSM power problems

I'm trying to install maas on UCS cisco but when i set "power type on UCS Manager Cisco" and than press on commission node the log show me this message: Failed to power on node — Node could not be ...
4
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2answers
173 views

Kernel panic 1/10 times after resume from suspend

I have a HP Notebook 15 running Lubuntu 15.04. On occasion after closing the lid and having my laptop suspend, I get kernel panic when I resume. Caps lock is blinking, and the screen locks - I have ...
0
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2answers
171 views

Xubuntu 14.04 fails to resume from hibernation

Not a crucial issue, it's just annoying when it happens. My computer has a great chance to fail in resuming from hibernation. When it happens, the console prints the following info and then hangs: ...
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0answers
379 views

JBL Charge 2 troubleshooting

Alright so I have a JBL Charge 2 and I had it charging for a day or two when I noticed it was blinking, so I unplugged it. I turned it on and it was fine and then I might have hit the phone icon ...
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1answer
45 views

Hibernate when lid is closed laptop 14.04

I need to hibernate the laptop when the lid is closed. Currently there is only suspend option is available.
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0answers
143 views

pm-suspend won't work

When execute pm-suspend, I got I/O error. And after checking other similar posts, didn't found a solution that fix the issue. The OS on pc: The pc has dual operating system: win8.1 mint mate 17.2 ...
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0answers
28 views

How to set power_profile at boot in 15.04?

I'm using 15.04 and trying to set the power_profile in /sys/class/drm/card0/device/power_profile to low at boot time, but whatever I try it's always high after a reboot. I'm using the following ...
3
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1answer
63 views

Auto-off screen only on battery power

This has been asked many times, but never answered. 14.04 Currently there is a function to automatically switch off the screen after the computer has been idle for x minutes. This setting will ...
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0answers
94 views

How can I reset usb port after over current draw?

I am powering my Raspbery pi with my USB2 port on my ubuntu laptop. Periodically, the USB power goes into over current protection and shuts down the port. I can reboot, and the port gets re-enabled, ...