Questions related to power management, particularly power saving measures.

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What is wrong with the power management of my Aspire One 756

My Acer Aspire One 756 (AO756-2894) doesn't want to charge the battery. The battery might be dead. However plugged in and without the battery it seems to remember the state of charge of the battery ...
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26 views

How do I optimize Ubuntu for usage as a guest (in virtualbox)? [on hold]

How can I optimize ubuntu for usage as a guest? For example, how do I turn off all energy management? (Ubuntu guests will shutdown on low battery when the host is just fine.)
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0answers
23 views

Laptop fails to suspend or hibernate, wakeup detected in Ubuntu 14.04

I installed Ubuntu 14.04 with gnome on my Thinkpad T410. To my surprise, it didn't have any option to suspend/hibernate the current session. So i installed pm-utils and also added extension which ...
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0answers
7 views

System goes to suspend mode on plugging out charging

I am using ubuntu 12.04 LTS. Whenever i plug out my charger, i see Low battery notification (even when my laptop is fully charged) and then my system goes to suspend mode. Please let me know if this ...
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1answer
30 views

How to save battery life in Dell Vostro 3446 (Ubuntu 15.04)

I have both Windows 7 and Ubuntu 15.04 on my Vostro 3446. I noticed that when I'm on Windows 7 I get easily 4-5 hours of battery life but when I'm on Ubuntu, it barely lasts 1.5-2 hours. I cam across ...
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0answers
12 views

MAAS Power-on problem IDRAC IPMI 2.0

I'm currently having a problem in getting MaaS (v1.7) to properly provision a Dell PowerEdge R630 server. The MaaS vm itself is able to detect the server automatically, and once the dell server boots ...
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0answers
26 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 ...
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2answers
40 views

How do I turn off battery charging in Ubuntu?

I mainly work on AC power. Therefore Windows has the below utility to improve battery life for my scenario by disabling battery charging: How do I achieve this in Ubuntu? Thanks in advance!
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22 views

What is the proper/recomended way to handle laptop power management in Ubuntu?

I have seen many power management utilities/methods for Ubuntu. These are few of them: TLP CPU Power Scaling indicator-cpufreq cpupower Using powertop command Using laptop-mode-tools Intel i915 ...
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1answer
58 views

Does Ubuntu 14.04 save laptop battery?

Does Ubuntu 14.04 save battery on my laptop HP ProBook 4540s? My search revealed the following: When working on ac then the command cat /proc/sys/vm/laptop_mode returns 0, and if the battery 5. This ...
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1answer
21 views

How can I get a visual indication if I muted audio and the battery power is running out?

Is it possible to show a flickering or something else to indicate the shut-down process is nearby instead to get my attention with beeps? Ubuntu Gnome here.
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0answers
16 views

Xubuntu automatic suspend doesn't work

When I set xubuntu on my Asus Eee PC 1015BX to suspend after 15 minutes of inactivity, after that time I get "Power Manager not authorized" notification and it doesn't suspend. I had the same problem ...
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0answers
12 views

Is it possible to turn off Thinkpad dead battery led indicator?

I have old Thinkpad T61 with ubuntu 14.04LTS. Battery is completely dead (orange light is blinking all the time). But I don't want to replace it. I would like to turn off that indicator? Can it be ...
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0answers
30 views

Ubuntu 14 LTS server going to sleep/shutdown

We recently transitioned from Ubuntu 12 to Ubuntu 14 server installations and started to notice that the servers are occasionally go to sleep after couple of hours to days intermittently. ...
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1answer
23 views

Changing the command executed using suspend/standby in 14.04 LTS

I had some problems with my Thinkpad X200T not suspending under 14.04 LTS, after trying different solutions, it seems the easiest fix is to just execute sudo pm-suspend How would I go about making ...
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2answers
185 views

Black screen on laptop lid open after update to 15.04

I suspend my laptop by closing the lid, but when I open it my screen stays black, when I should be prompted to enter my xscreensaver password. The screen is "on" because I can switch TTY using ...
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1answer
55 views

Wireless Power Manager Problems in Ubuntu 15.04

I've only recently upgraded to Ubuntu 15.04 from 14.04 and I noticed, unlike 14.04, my wireless power manager was turned on by default. It turns off ok with the sudo wlan0 power off But is back on ...
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1answer
54 views

how to make hibernate work on 14.04?

My Ubuntu is 14.04 on Thinkpad T400. I try to run the following command for hibernation: $ sudo pm-hibernate It flashes and then return back to normal. Running pm-suspend-hybrid also ...
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2answers
90 views

What does “inactive” mean in “suspend when inactive for xxx mins”?

In system settings -> Power, what does "inactive" mean in "suspend when inactive for xxx mins"? If my laptop am running a hours long backup program while i am sleeping, is that considered ...
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2answers
18 views

What is the difference between the various methods of suspending in 14.04?

Are the following ways of suspending 14.04 the same? Choose menu for suspend close the laptop lid cover run pm-suspend. What are their differences? Any suggestions on when to use which?
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1answer
20 views

How is “thaw” different from “resume”?

In power management, what is "thaw"? How is it different from "resume"? Thanks.
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2answers
52 views

Why is my system not waking up from suspend?

I freshly installed Ubuntu 15.04 sharing a preexisting home partition (Mint 17.1). However, in neither Mint or Ubuntu the computer is waking up from suspend mode. The status LED keeps blinking and the ...
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0answers
81 views

Laptop with Ubuntu Mate 15.04 screen dimming after 10 seconds

I watch movies on Youtube, Popcorn or XBMC and after 10 seconds when I have my laptop disconnected from power the screen dims. I know that there is an option in dconf-editor for longer timeout but ...
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15 views

Power plugged in/out starts suspending my usb Mouse

After system update of laptop (ubuntu 14.04) It starts suspending my usb mouse whenever i plugging in/out the power supply . If i plug out the mouse from usb and plug in againg then it starts working ...
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0answers
23 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 ...
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0answers
53 views

Battery will not charge past 59%. I have no access to Windows or lenovo softwares anymore [duplicate]

I have an Ideapad Touch u430 that came with AOE licence. As it was recommanded, I used the Energy Manager to enable the Economy mode (I don't remember the exact name) that makes your battery stop ...
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0answers
61 views

Need to press the power button twice for Ubuntu 15.04 to boot

I have a dual boot set up (Windows 7/Ubuntu 15.04). I've recently upgraded from 14.04 LTS to 15.04 and since then, I have to press the power button twice. The first time it goes to GRUB without any ...
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1answer
51 views

CPU frequency limit to 2000 on battery

I want set frequency to 2100 in battery mode but it have limit to 2000. I ran tlp ac and change CPU frequency with indicator-cpufreq to 2100 (and also check Performance) then check frequency with ...
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0answers
230 views

Reduced battery life with ubuntu 15.04

I'm using a Lenovo Z-5070 Ci7. I had a battery life of nearly 4 hours when I was using Ubuntu 14.04 LTS. After updating to Vived Vervet (15.04) my battery life is reduced to nearly 2 to 2.5 hours. ...
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1answer
156 views

Wireless power management turns back on in 15.04

I have turned off power management for my wireless. I did that in /etc/pm/power.d/wireless. When I try to connect to a network, the power management turns back on. So the connection fails. I try: ...
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1answer
73 views

How To Get Rid of This? Ubuntu is Definitely Consuming More Power Than Windows! [duplicate]

System details: Intel Core i5 2.50GH, Nvidia, 2GB RAM, 32bit O/S for both Linux and Windows. Well I have been using Ubuntu 14.04 LTS for nearly 1 week. I have noticed whenever my laptop runs on ...
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0answers
24 views

Unable to discover USB external HDD after entering power management

I have a USB-HDD attached to my box. The USB HDD will not be discovered by my linux after entering power saving. I already turned off the power saving through the command line tool, hdparm. However, ...
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1answer
51 views

Cant Change power profile ubuntu 15.04

I was using following command to change graphics card power profile in Ubuntu 14.10 got from Radeon HD 6950 temperature is way too hot. echo low > /sys/class/drm/card0/device/power_profile But ...
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0answers
87 views

Vivid Vervet freezes after waking from suspend

After upgrading to Vivid my laptop (Lenovo y5070) freezes when waking from suspend. I cannot get a tty shell and after shutting down and rebooting with the power button, the mouse pointer is ...
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1answer
270 views

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
16 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
23 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
56 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
196 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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1answer
2k 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
184 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 ...
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1answer
82 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
59 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
41 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
17 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
23 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
38 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 ...
3
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1answer
157 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
40 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
29 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 ...