Questions related to power management, particularly power saving measures.

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13 views

How to disable automatic shut-down on low power (Ubuntu 15.04)?

So apparently there's a nasty bug on my laptop (an Acer Aspire 3810T) that makes Ubuntu freak out when plugging/unplugging power. Frequently, it claims the battery is at 0% when switching power ...
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0answers
10 views

Powertop systemd service failed to load

After my installing of powertop and calibrating it, I create systemd service with following text: [Unit] Description=Powertop tunings [Service] Type=oneshot ExecStart=/usr/bin/powertop --auto-tune ...
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0answers
14 views

intel pstate, turbo always on cpu temp is 60 and without only ~43

I have a problem with pState on my Thinkpad L450 with Intel 5200U (broadwell) + SSD. When I use pstate, the turbo mode is nearly always turned ON and my CPU fan is also always ON because cpu temp is ...
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0answers
29 views

Suspend/Hibernate/restore and Reboot problems 15.04 Dell Inspiron 3451

There are many posts and questions about problems with lid closing leading to operating system states which require hard reboots; these reports come from across multiple kernels and releases of ...
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0answers
8 views

Computer won't restore from monitor power saving

When monitor power saving mode is on and the monitor falls asleep, I can't wake it up and have to do a hard shutdown. I've tried pressing keys, moving and clicking the mouse, unplugging and replugging ...
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0answers
17 views

Problem with backlights in suspend ubuntu 15.04

i have problem with my backlights (i guess) when i put my laptop to suspend or closing the lid is goes everything in normal system will suspend but when i want to open up system will run but blank ...
0
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1answer
40 views

How to scale intel_pstate driver on Ubuntu 15.04?

I nearly tried all the solution to scale the cpu frequency but no success. I have Intel Core i5-3210m 2.5Ghz-3.1Ghz. I want to permanently set it to 1.6Ghz with no turbo boost to improve battery ...
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0answers
17 views

Heating, projecting and lid closing problems in Ubuntu Gnome 15.04

Ever since I upgraded from Ubuntu 14.04 to 15.04 in April this year, I have been beset by productivity-reducing problems. I had started off unable to get the login screen on booting which got resolved ...
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0answers
14 views

PC is shutting down although the battery is charged 50% of above

I'm using Ubuntu 14.04 the problem is when I am using pc with plug in for charging or without charging from starting time it working normally.But when I plug out the pc from charger when the pc is ...
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0answers
28 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?
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18 views

Ubuntu 14.04 can't fully charge battery with windows 8.1 dual boot

I have a Toshiba Satellite E45t-A4100 dual boot windows 8.1 with ubuntu 14.04. There was no problem with installation. Normally the battery will charge to 70%. Sometimes it will charge to roughly 80% ...
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16 views

Lenovo B50 power management

Lenovo B50 power management is not working with Ubuntu 14 and 15 versions when shutted down the laptop is still running while only the screen is switched off, same when restarting Regards John
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0answers
31 views

14.04.3 wakes up as soon as putting to sleep

I have Ubuntu 14.04.3 32 bit OS. I set my comp to sleep after 5 minutes of idleness. It was running OK until today. I should say that handling of power management is not reliable in Ubuntu. My system ...
1
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1answer
50 views

How to set up gnome-screensaver?

I am running Ubuntu GNOME 15.04 and I have install gnome-screensaver, however after doing some searches through my system, and my system settings, I am unable to find any configuration settings for ...
2
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1answer
44 views

Ubuntu 15.04 suspend halt

I have laptop Lenovo E540 with SSD + HDD Ubuntu 15.04 on SSD with UEFI, kernel 3.19.0-26-generic Nvidia GeForce 840M with driver 346.59 The problem When I suspend the laptop, i hear HDD heads ...
0
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1answer
31 views

Disable low battery notifications/warning on 15.04

I would like to disable the low battery warnings on Ubuntu 15.04. My laptop seems to have a faulty charge port or has trouble detecting the true charge of any battery I put in it, even brand new ...
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0answers
22 views

Battery charge limit and critical battery action

Ubuntu 14.04 lenovo z50-70 here. Here's my situation. I am using my laptop with the power cord plugged in at all times because i essentially use it as a desktop. Never leave the house with it and ...
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0answers
47 views

Battery percentage jumps down to 6% from 50% or 60%?

So, as the title says, I have checked Power Stats in Ubuntu and Energy when Full and Energy (design) are the same which is 37.2 Wh but the percentage is funny with actual battery life left in my ...
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0answers
18 views

Absent power status indicator

I have no power status indicator on my top unity panel. All of the suggested solutions to restore it doesn't work for me. Also there is no power usage statistic in unity-control-center -> power ...
1
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2answers
28 views

Logitech Mouse power saving

Is there a way to put my Logitech wireless mouse to sleep after a while? When using windows if I don't touch the mouse for something like 5 min it is turned off automatically and when I touch it again ...
0
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1answer
51 views

Battery not fully charged (it shows 100%)

Ever since I upgraded from ubuntu 12.04 to 14.04 I've been noticing that the battery does not last as much as it used to. The bar indicator shows that it is fully charged but I ran tlp-stat and I got ...
0
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0answers
27 views

Recently installed ubuntu 15.04 replacing windows 7, on thinkpad edge e430. unresolved battery issue?

tlp stat result: tp-smapi = inactive tpacpi = active i have tried (Lenovo ThinkPad Edge E430 Battery Problem), but this battery works fine on windows with think power manager. let me know if ...
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0answers
33 views

Issues with upgrade 12.04 to 14.04 (battery drain, freezes…)

I've been using ubuntu 12.04 for over a year without any issues with my laptop (MSI GT70.) It has an integrated intel graphics card and an nvidia GTX 870M. Therefore, I have been using the bumblebee ...
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0answers
14 views

Preformance profiles? How? 15.04

I'm experiencing a problem when using Linux (Ubuntu gnome 15.04 for now, but it does not matter what distro or DE to use). If i launch several applications my laptop stops charging, and starts to use ...
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0answers
12 views

Fan Periodically Overspeeds When On AC Power

My laptop is a Dell Inspiron 15R 5520 and for a while I have noticed that when it is on AC power, its fans will temporarily run at max for several minutes before returning to normal operation, and ...
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0answers
43 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 ...
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0answers
15 views

Screen Switches Off And Also Kills Downloads

Im using Ubuntu 14.04 on most of the default settings. By default the screen switches off after 5min and "dims to save power". I have unchecked the lock checkbox so when I return to my computer I dont ...
1
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0answers
50 views

Ubuntu Aquaris 4.5 battery sometimes runs down quickly when not in use?

Checking the battery use for the Ubuntu phone Aquaris4.5 it shows an almost flat line when not used (wifi enabled, otherwise all the battery saving settings used) Occasionally (3times in the last ...
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0answers
28 views

Why does ubuntu freeze sometimes when I shut my laptop screen

I own a Lenovo Y50 running Ubuntu 15.04 64-bit and sometimes when Ii shut the screen the login screen is displayed after I open it back up again, but it is unresponsive and I can't do anything from ...
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0answers
13 views

fan off + system slowdown in battery mode

If my laptop runs on the battery, its fan is off/silent and the system sometimes slows down till complete freeze. I believe it's somehow related with power management. For comparison, when I run an ...
1
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1answer
26 views

How to down tune power consumption on laptop home server

I recently got a new laptop, so I decided to use my old one as a home server. The problem is that it's rather power-hungry and I would like to make it more energy-efficient. Would it be a good idea ...
0
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0answers
23 views

Ubuntu 14.04 with Asus Q550LF sleep mode issues

I recently installed Ubuntu 14.04 on my Asus Q550LF and for some reason I have issues with sleep mode. When I put my computer in "suspend mode" or when I shut it sometimes the screen won't work again ...
1
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1answer
35 views

Software Updater removed laptop-mode-tools after upgrading

After upgrading today to 14.04.3 via terminal, the Software Updater removed laptop-mode-tools saying it was an old package. Has laptop-mode-tools become obsolete in 14.04.3 or should I just ...
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2answers
29 views

when i close my laptop lid my secund screen requiers password when set to do nothing

I'm new to Linux using Ubuntu 14.04.2 LTS 64-bit and using a Fujitsu lifebook a series. When I close my laptop lid while trying to watch a movie on my TV with the HDMI cable. the screen requires my ...
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0answers
26 views

Suspend to disk on ASUS eee pc 1005 HA under kubuntu 15.04

I just switched from openSuSE to kubuntu last week. I have only one problem with it on my eee-pc 1005HA: When I suspend to disk, it does not switch off by itself as it should. Waiting, until the ...
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0answers
18 views

How to detect the method which woke the computer?

I'm hoping to write a script that will, in the middle of the night, turn a suspended computer on and cause it to immediately hibernate. I'm well aware of the "hybrid suspend" options available, but I ...
0
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0answers
20 views

Ethernet port doesn't work when laptop plugged out of AC power

Currently, I have 3 OS installed on my Disk, Windows 7 Ubuntu 15.04 Kali Linux (Recently installed) The problem persists before installation of Kali Linux that, When I've booted into Ubuntu, ...
1
vote
1answer
63 views

Is there a wireless controller that can wake Ubuntu, or at least keep it from sleeping?

When I play games in Steam, my computer doesn't recognize that I'm mashing buttons and it goes into sleep/suspend mode. I don't want to disable power management or use wake on LAN. Is there any other ...
0
votes
1answer
21 views

USB and PCI devices taking a LOT of power

So I ran powertop on my laptop and saw that I have a lot of devices that are draining power on full speed the whole time according to the program. As you can see there a lot of things taking 100% ...
1
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0answers
19 views

hibernation at critical battery level not work

I use this tutorial (hibernation enable) to put my Ubuntu 14.04 in hibernation. All works well if I put my notebook in hibernation manually. But I need at critical battery level it's put to ...
4
votes
1answer
49 views

Advanced power options for lid closing

I have ubuntu 14.04 installed on my dell e5440. What I'm trying to do is to make my computer suspend when I close the lid when I'm plugged in and hibernate when on battery power. What I've managed so ...
0
votes
1answer
38 views

tp_smapi on the Lenevo Thinkpad T440p (or just battery thresholding)

I'm trying to get the tp_smapi module working on my Thinkpad T440p for battery thresholding with tlp. However, when I run sudo tlp-stat -b it returns tp-smapi = inactive (kernel module 'tp_smapi' ...
0
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0answers
52 views

Ubuntu 15.04 suspend loop bug

I'm having the same bug as listed here: https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/1450013 and here: When I install Ubuntu 15.04 the computer hibernates but changing to ...
1
vote
1answer
44 views

Battery suddenly not charging anymore

I have a relatively new ASUS F451MA. I had already updated the BIOS to the latest version before the problem appeared. I have opened up my laptop and tried to reset the battery by taking it out and ...
0
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0answers
113 views

Ubuntu 15.04 Suspend not working. System resumes automatically a few seconds after suspend

System properly suspends when clicked on Suspend but Wakes up automatically after a few seconds even without pressing any key or power button. sudo pm-suspend also not working anymore. sudo ...
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0answers
54 views

Network Card Refused to change power state after resume from suspend in 14.04, worked fine in 12.04

The ethernet wouldn't work after resuming from suspend, this was not the case in 12.04 after upgrading to 14.04 it happens all the time. Looking at the dmesg output after coming out of suspense it ...
1
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0answers
38 views

I want to charge an iPod while in Suspend

Sony Vaio VGN-FW250j Intel Core 2 Duo P8400 dual boot Win 7 / Ubuntu 15.04 I am able to suspend and hibernate this laptop in both OSes. Ubuntu will not allow me to use the USB ports to charge my ...
1
vote
1answer
27 views

Suspending when CPU idle

I am using 14.04 (Trusty). I have Power -> Suspend when inactive for 2 hours. This works fine if I am logged in and then walk away. But if I am not logged in, it never suspends. Moreover, I understand ...
5
votes
1answer
85 views

Notebook wakes up from Standby

I have an Acer Aspire V5 Notebook with Ubuntu 14.04 installed on a SSD an Windows 8.1 on a HDD. I experience that my Notebook wakes up from standby randomly after a certain time (can be a few ...
0
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0answers
27 views

battery is not being charged or used

My battery is 89% charged, but as soon as I pull out the power cord from my laptop the laptop electricity supply is killed (and the computer shuts down). Here are my battery stats: So basically, ...