Questions related to power management, particularly power saving measures.

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-1
votes
2answers
22 views

How to write a script to “listen” to battery status and alert me when it's above 60% or below 40%?

I want to make a tool that alerts when battery is below 40% or above 60% so I can start/stop charging accordingly. I know some tools alert when battery is low, that's not enough. Is there a tool ...
5
votes
5answers
8k views

Prevent screen turning off when watching video in XBMC

In 12.04, the screen never went to sleep while watching videos in XBMC. However after upgrading to 12.10 and changing no settings, it does. Is there any way I can prevent the screen automatically ...
3
votes
2answers
2k views

Ubuntu not is hibernating when lid is closed

I use Ubuntu 12.04 in my laptop. I'm trying to configure to hibernate when lid is closed. However, not is working. I did the following steps to solve the problem: I enable in ...
1
vote
1answer
34 views

14.04 LTS can't suspend anymore

I changed the "what to do when laptop's screen is closed" option under Power last night. It was at suspend and I switched it to do nothing. The problem is, I can't get it back to suspend anymore! ...
15
votes
1answer
2k views

Is there ongoing work in the kernel team to improve battery life under linux?

I have read in some forums that the kernel team is working on improving battery life and energy efficiency in Linux. Unfortunately our community really lags behind Windows and Mac in that regard. I ...
0
votes
1answer
82 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 ...
14
votes
1answer
6k views

How to change critically low battery value?

I would like my laptop to hibernate itself when the battery level is 10% to be sure it has enough power to complete the operation properly. Actually if I don't pay attention my laptop informs me it ...
6
votes
3answers
4k views

How to turn off screen (DPMS) together with locking session in KDE?

First of all, I'm aware a similar question for GNOME is asked here: "Switch off laptop backlight when locking screen". Objective I would like to turn off my screen on locking the session for power ...
1
vote
3answers
10k views

How to make my screen brightness not change when I plug my laptop in

I do not want my laptop to change brightness when my laptop power is plugged in or unplugged. I set my brightness based on how bright my surroundings are. If I am in a dark room, I set my brightness ...
25
votes
7answers
48k views

How do I completely turn off screensaver and power-management?

I looking for a method to turn-off the screensaver and powermanager but from the command line. I'm aware this can be done via the GUI screen - but can this be done via the command line or via some ...
0
votes
1answer
2k views

battery icon / power indicator not shown in menu bar after upgrade to 12.04

Since the upgrade from 11.10 to 12.04 the battery icon / power indicator is not shown any more in the menu bar. I went to 'system settings'-->'power' and tried to set 'show battery status in menu ...
0
votes
0answers
8 views

Set Brightness to 0 when lid closes

is there a way of setting the brightness level to 0 or blanking the screen when I close my lid (without suspending the system). I just prefer it that way, since I listen to audiobooks while driving ...
0
votes
2answers
27 views

let utransmission run even after lid closed?

How do I set my settings such that even if I close my lid (Laptop) My downloads don't stop or pause in utransmission I have set the setting in power options to not suspend after closing lid still ...
2
votes
1answer
55 views

Please explain the parameters 'noexpose' and 'cycle' in xset

I have been trying for a long time to prevent my screen from blanking every 20 minutes. I understand there are many interlocking layers of applications that can do this and it is not straightforward ...
2
votes
1answer
5k views

Enabling the power management for SATA link [duplicate]

After tearing down my laptop, I came to know that most of the heating issue in my laptop is caused by HDD. Powertop is also showing the same problem. I am seeing significantly cooling after activating ...
1
vote
2answers
123 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 ...
1
vote
1answer
97 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 ...
-1
votes
0answers
16 views

Ubuntu sleeps and wakes repeatedly on critically low battery state

When the battery is critically low it just suspends itself and wakes again automatically repeatedly in a loop. And i need to be like very very fast to click the shutdown button to turn down the ...
0
votes
0answers
26 views

Ubuntu 14.04: hibernate consumes power

Upgraded from 12.04 to 14.04 (not new install). In 14.04, enabled display of hibernate choice in power menu. This works as well as pm -hibernate. Followed the steps in ...
8
votes
4answers
13k views

How to stop screen going black after 10 min

My OS is Lubuntu 13.04. After 10 mins of inactivity the screen goes black. What I did to stop it without effect: uninstalled xscreensaver completely in power setting I set to never blank the screen ...
0
votes
0answers
49 views

Ubuntu 14.04 does not recognize my battery

For the last 3 years I've been using a Samsung notebook. I was using Ubuntu 13.10 until 2 weeks ago. Then I decided to format and install Ubuntu 14.04 LTS. Everything was working great, until the ...
0
votes
2answers
30 views

Excessive Power Consumption by ethernet socket

Recently I have been having problems with power consumption in Ubuntu, I am not exactly sure when this started but roughly about two weeks ago. Idle my laptop used about 9-10W of power, or at least it ...
0
votes
1answer
39 views

How to avoid the automatic disk check every 30 reboots? [closed]

It it has to do a disc check from being powered down 30 times like that.I have to do it that way cause it wont power down regularly and I'm running Linux ultimate edition x64 2.3. I know its out dated ...
3
votes
2answers
62 views

What exactly is TLP doing that default system config wouldn't?

All the info about TLP on the surface looks more like advertisement and marketing to me, I can't see any detailed comparison to default configurations. What are the precise differences compared to ...
1
vote
1answer
81 views

suspend error on 14.04 LTS

I've looked around and seems like various problems around suspend are wide spreaded for 14.04 release, nevertheless I haven't seen exactly my problem reported, nor my laptop model mentioned. So, the ...
1
vote
1answer
63 views

Power ON after lid open

I have re-installed Ubuntu 14.04 on my Sony SVF1521 laptop. When I open lid, automatically turn ON power. I checked Power setting I didn't found any option for disabling this action.I didn't use any ...
1
vote
2answers
310 views

Alarm clock from suspended mode

I want my laptop to wake up from suspended mode in the morning and alarm me to wake up using my mp3 file. How do I do it? I tried apmsleep, but it doesn't work cause my PC doesnt have "suspend to ...
3
votes
5answers
4k views

Brightness control doesn't seem to work on a Toshiba Satellite M115 laptop

I have Ubuntu 12.04 LTS on a Toshiba Satellite M115 laptop. The brightness control doesn't seem to work with the "brightness and lock" setting or fn+f6 and fn+f7 (which usually works in Windows). How ...
2
votes
2answers
663 views

How to prevent suspension when a program is currently running?

Is there any way to make Ubuntu 12.04 understand when it should suspend or not in terms of the software that is currently running? For example, if I am installing something and it takes more than 10 ...
0
votes
1answer
78 views

The 'resume after suspend' problem

I recently moved back to Ubuntu. And it has seriously improved. Everything is so smooth and fast. Except, I have this issue, like so many others, I cant wake up after suspend while on battery. With ...
0
votes
0answers
28 views

Suspend broken: pm-suspend fails due to /sys/power/* being a Read-only file system

My System 76 laptop running 14.04 won't suspend. Running sudo pm-suspend fails with the following in /var/log/pm-suspend.log: Running hook /usr/lib/pm-utils/sleep.d/94cpufreq suspend suspend: ...
0
votes
0answers
61 views

problems resuming from suspend on macbookpro11,1

I've installed ubuntu 14.04 on my new macbookpro (11,1), and I'm having power-management problems. The biggest one is that after suspending by closing the lid, when I open it, it either never wakes ...
0
votes
0answers
41 views

Battery & Fan Issue

System ASUS N56VJ Ubuntu 14.04 - 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Issue: Sometimes when I start up my laptop, the fan turns on at full ...
0
votes
1answer
48 views

Black display after wake from suspend via closing the lid

I have bought a new HP 15-G002AX notebook recently, with Processor: AMD A8-6410 APU with AMD Radeon R5 Graphics × 4 Graphics: Gallium 0.4 on llvmpipe (LLVM 3.4, 128 bits) I am using ...
0
votes
0answers
88 views

xfce4-power-manager not updating; ACPI finding an unknown battery but working fine?

I recently upgraded my Asus S56CA Ultrabook and unfortunately my battery indicator in xfce4 stopped working. However, the battery indicator in the system tray is not updating at all. If I start the ...
1
vote
1answer
57 views

Why is my wireless network adapter acting in a strange way? (Ubuntu 14.04)

I have a laptop with Intel Centrino Advanced-N 6235 wireless network card, and I'm on Ubuntu 14.04. For almost a week I have had a strange problem with my wireless card. When I plug in the power ...
0
votes
3answers
572 views

How do you control how hybrid suspend works?

I would like hybrid suspend to act a certain way. If I add the code # Always use suspend_hybrid instead of suspend if [ "$METHOD" = "suspend" ]; then METHOD=suspend_hybrid fi PM_HIBERNATE_DELAY=XX ...
0
votes
0answers
32 views

How to find out what's wrong with my battery?

native-path: BAT0 vendor: ASUSTEK model: M50--24 power supply: yes updated: Vi 08 aug 2014 21:42:17 +0300 (30 seconds ago) has history: ...
8
votes
2answers
4k views

13.10 hangs on waking from suspend except when suspended from console

I know waking from suspend is an issue, but this looks like a separate bug. When I suspend 13.10 on HP Pavillion dv6 (AMD 6770M/fglrx 13.10.10) from x, it suspends normally but freezes when waking. I ...
0
votes
0answers
42 views

How can I make my PC hibernate when idle? 14.04

I see that this was asked some time ago for 11.04. The answer there didn't help since the answer used gconf-editor to find a key called /apps/gnome-power-manager/actions/, which doesn't exist when I ...
4
votes
4answers
7k views

Keep Ubuntu Server running on a laptop with the lid closed?

I decided to use my Eee PC 1001HA as a home server. I have it connected through Wi-Fi to the router, running Ubuntu Server 12.04. Everything works fine except this annoying problem: when I close the ...
1
vote
4answers
107 views

Laptop Battery Draining Too Fast. Laptop is too hot

I have HP ProBook 4540s with CPU Intel(R) Core(TM) i3-3110M and GPU AMD Radeon HD 7650M and Intel(R) HD Graphics 4000. (Intel® Ivybridge Mobile also.) OK, the problem is that the laptop is getting ...
2
votes
1answer
1k views

Monitors won't sleep (power management) if synergy or synergyc? is running

Similar question to Monitor won't enter power save mode , however I only experience the problem under synergy. Screensaver settings work, but the monitors never go to sleep. When synergy is not ...
2
votes
0answers
48 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 ...
-1
votes
0answers
78 views

Ubuntu 14.04 wrong battery level causes OS to hang

i'm runnig Ubuntu 14.04 on Dell E5540 laptop (i5-4200U). i suspend and resume a lot. once every other day i see this behavior: i suspend, everything is normal. i resume, but i'm taken to my desktop ...
2
votes
2answers
3k views

Ubuntu 12.04 LTS drains my Samsung Series 9 900X3C ultrabook's battery extremely fast. Is there anything I can do to fix that?

The title basically says it all. My Samsung Series 9 900X3C ultrabook's battery is in the deep red around barely three hours after disconnecting it from the power - and during most of that time the ...
1
vote
1answer
20 views

Can I change actions upon inactivity and timeout for that from command line?

How do I set the policy about what action should be taken if the computer is inactive for some time. This can be easily done from GUI, via Power Manager. I am trying to do this from command line. I ...
0
votes
1answer
84 views

Resume from suspend requires hard reset [closed]

Most of the threads I've found relating to this problem state that the machine powers up but the screen remains black. Not so in my case. The problem I am experiencing is this. When testing the ...
1
vote
1answer
52 views

Ubuntu 12.04 comes out of hibernate/standby randomly on Dell XPS 13

I have an ubuntu 12.04 laptop and it comes out of hibernate or standby randomly. For example, yesterday I selected hibernate, closed the lid and put it in my computer bag. 24 hours later, it is ...
1
vote
1answer
104 views

Lenovo X1 Carbon with Ubuntu 14.04 wakes from suspend by itself after 3 hours

My machine seems to wake up from suspend by itself, at irregular intervals. Causing the power to die out, and machine turn off. It is quite the annoyance, when the machine is in my case and it wakes ...