Questions related to power management, particularly power saving measures.

learn more… | top users | synonyms (1)

0
votes
1answer
8 views

File swipped away after power faliure

We are bunch of guys (9) working on a project. All of us save our files to a single computer which has windows share enabled on the project folder. There is a problem of power cut out in our place and ...
19
votes
5answers
39k views

How can I control HDD spin down time?

I have 2 HDDs in my PC. Ubuntu is turning off the secondary HDD very quickly after about 15 minutes, which is short for me. I need to control this time. How can I do it? I tried GNOME power ...
0
votes
2answers
20 views

Ubuntu and battery life

Currently I'm using a Netbook (Dell Latitude 2100 non-touch scree) (2GB RAM, 1.6GHZ Intel Atom Processor, 60GB HDD, originally Win Vista Business, currently WIndows 7 Pro and a windows experience ...
0
votes
2answers
596 views

Docky is closing when I plug/unplug the AC cable

Every time I plug/unplug the power cable docky is closing. This thing is happening since I have updated to 14.04, also, my battery life seems to be shorter. I am using a toshiba satellite c55-A-1PX.
1
vote
1answer
31 views

Computer not suspending when inactive in the main log-in prompt

My computer is set to automatically dim the screen and lock after 10 minutes, and suspend after an hour of inactivity. That works fine - but only once I've logged in. If I switch the computer on and ...
17
votes
5answers
24k views

Ubuntu 12.10 “Turn screen off when inactive for: Never” still turns off

After a fresh install of Ubuntu 12.10, my screen still goes off after about ten minutes. I've been to the Brightness and Lock control panel. The Turn screen off when inactive for: setting is set to ...
0
votes
0answers
12 views

Ubuntu 14.04 upgrade won't suspend

I have upgraded to Ubuntu 14.04, since then my computer won't suspend. When I click suspend from the menu it just goes to a locked screen. It is using up my battery. I have to totally close down ...
3
votes
0answers
32 views

Ubuntu still shuts down after I plugged my charger in

On Kubuntu when my battery is dying and I plug my charger in, it says "All suspensions have been cancelled." On Ubuntu or more accurately, Unity-based distors, it still shuts down after plug in my ...
1
vote
0answers
12 views

USB 3.0 ExternalEnclosure Unmounts at random

Title says it all. I noticed the drive was unmounted, so I got to looking through dmesg and found: [31080.516164] usb 4-3: USB disconnect, device number 3 [31080.760493] usb 4-3: new SuperSpeed USB ...
0
votes
2answers
74 views

How to lock without turning the screen (monitor) off?

Due to a recent bug, each time my screen turns off, I cannot get it back on. Currently, the screen starts turning off after the computer is locked - which effectively means that I cannot lock my ...
0
votes
1answer
61 views

Horrible battery life with Ubuntu 14.04 on ThinkPad

I've purchased a Lenovo ThinkPad S540, which has according to Lenovo '9 hours of battery life'. I was really happy when I tested the device running Windows 8.1, and the battery worked for 6 hours. But ...
2
votes
1answer
4k views

login fails and returns to login screen

I run Ubuntu 10.04 inside VMware on a windows host. After a power outage I can no longer log into Ubuntu. I get to the login screen, which mysteriously also changed its color theme from the standard ...
4
votes
5answers
10k views

Power Management - Sleep / Wake up Server when accessed

I have a headless HP Proliant Microserver with ubuntu installed. This machine has samba shares on it serving media and I usually rdp or ssh into it. Now my issue is I want the machine to go into sleep ...
2
votes
2answers
650 views

Intel Corporation Wireless-N 7260 card dies randomly

On Ubuntu 14.04 32bit, after some up-time my wireless card stops working. Sometimes it helps to stop WiFi in the nm-applett (at the top right corner) and restart it to get a new connection to my WiFi, ...
2
votes
0answers
1k views

Keep External HDMI Monitor ON

I am running XBMC (Frodo) on an Asus U47A laptop (Intel Sandybridge graphics) with Ubuntu 12.04. The laptop is connected to an older Phillips 27" tube HDTV via HDMI. What I would like is for XBMC to ...
1
vote
0answers
73 views

Xfce power manager in Xubuntu 14.04 doesn't react to my choices

Okay, so I chose to make it so that when my laptop lid closes and I'm on AC (my power cord is plugged in) it will do NOTHING. But when I close my laptop lid .. it just suspends. I've tried it like a 8 ...
0
votes
0answers
43 views

Power management advanced tool

I'm searching for a tool that has a lot of configurable options. It should be able to detect events like cable plug-in/out, save many profiles and change options like CPU frequency, screen brightness, ...
2
votes
3answers
5k views

How can I disable usb-autosuspend for a specific device?

This is related to the issue discussed in this question. Summary: the mouse freezes when operating on battery since it is autosuspended after a certain time and needs more time to wake up. Disabling ...
0
votes
1answer
278 views

Could not stat the resume device file

I've copied one disk content to another disk and now when system boots I get this: resume: libgcrypt version: 1.5.0 resume: Could not stat the resume device file '/dev/sda6' please type in full path ...
-1
votes
1answer
22 views

How to make ubunu in power saver mode?

when i type this command in the terminal sudo aptitude install pm-utils to use power saver mode it tells me sudo:aptitude command not found what can I do to fix this ?
0
votes
1answer
33 views

What's the difference between putting display to sleep and switching off the display?

When I mess with my power options, I have the options: Put display to sleep when computer is inactive for: Switch off display when computer is inactive for: What is the difference between ...
0
votes
0answers
23 views

Automatic Screenlock keeping screen on, ignoring timeout setting

I'm on a Macbook Air 4,1 running 14.04, with surprisingly minimal trouble so far. However there is an issue with the screen - when I set the 'Lock' on, in 'Brightness and Lock', when I close the lid, ...
1
vote
2answers
2k views

Do I need to add a boot parameter to work around this kernel power bug on a Sony Vaio VPC-EH1S0E?

If i with dmesg | grep -i aspm have this: [ 0.503709] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it [ 0.673564] ACPI _OSC control for PCIe not granted, disabling ...
0
votes
1answer
72 views

Go to sleep based on screen activity

So, the behavior I want is: 1. Screen goes blank when inactive for [specified time]. 2. Computer suspends when screen is inactive for [specified time 2]. With the default setup, these two can be ...
0
votes
1answer
37 views

How to consume less power in ubuntu?

I noticed when I installed Ubuntu that it consumed more power, so I want to know how to reduce power consumption.I want the steps please.
85
votes
11answers
66k views

How can I tell Ubuntu to do nothing when I close my laptop lid?

I would like closing the laptop lid to be a no-op. How can I do that?
2
votes
2answers
457 views

xfce4-power-manager does not open

I recently changed my DE from Unity to XFCE. I really enjoyed it, but the power manager doesn't work. When I try to open it from the settings menu, I get the following error: Unable to connect to ...
0
votes
1answer
19 views

Ubuntu server detecting electricity outage?

I am in the planning stage for setting up my server and have some doubts. Firstly my network is something like this: One parent PC connected to the internet and 3 other child PCs which are not ...
4
votes
4answers
500 views

Shut down acts as restart?

I've installed Ubuntu (almost all latest versions), when my Acer Aspire V5-471 is want to shutdown from Ubuntu, it acts as restart/reboot. Refer to edit 2 for releases tried and edit 1 for tried ...
1
vote
0answers
359 views

Lenovo G480 has a 64°C temperature, should I worry? [closed]

My Laptop is a Lenovo G480 (20157) and came with Windows 8 pre-installed. I cleared it out and made Ubuntu 14.04 (LTS) my primary OS. Everything is awesome except the heating problem. My laptop burns ...
0
votes
0answers
27 views

Hibernation works only when connected to AC power

Please help me understand this part of syslog when I try to wake up from hibernation. My specification - 4 GB of RAM, 8 GB of linux-swap, intel core i5-4200U, NVIDIA GeForce GT 750M. The problem is ...
-1
votes
1answer
25 views

how to increase MaxPower of specific usb port

it takes long while to charge mobile phone by usb port. how do i specifically increase MaxPower of usb port ? this cmd help to understand MaxPower of usb port root@ROHIT-PC:/home/rnztx# lsusb ...
-1
votes
2answers
306 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 ...
3
votes
4answers
8k views

The battery indicator in Unity panel not showing up

I installed Ubuntu 12.04 with Wubi. Well after being completely dazzled with the amount of free content in the Software Centre, I decided to go deeper and start messing with settings. Well after ...
6
votes
2answers
770 views

How do I get a wireless USB keyboard to to wake Ubuntu 13.10 from suspend?

My PC with Ubuntu 13.10 is set to suspend after 30 minutes of inactivity. Up until it suspends I can resume working at any time using my Logitech K400r wireless USB keyboard. The OS defect/problem ...
-1
votes
0answers
23 views

When I leave my laptop lid open, how do i may it so that it doesn't suspend? [duplicate]

It just keeps blackening out when I'm afk for 10 minutes or so. How can I stop that?
3
votes
1answer
46 views

Prevent machine from sleeping when SSH connections are on

I am trying to save power by switching desktops to suspend mode when they are inactive. But many desktops are also accessed via SSH by their owners. There is a wakeonlan solution deployed to enable ...
0
votes
1answer
42 views

Simulate power button using command?

When I hit the power button on my laptop (Ubuntu 14.04.1 without any modifications), I receive a pop window saying Goodbye, what would you like to do? Lock Suspend Restart Shutdown How can I get ...
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
0answers
63 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 ...
-4
votes
2answers
152 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 ...
3
votes
1answer
194 views

Ubuntu wakes up automatically after suspending

I'm having this problem since Ubuntu 12.10/13.04 i think, now I have 14.04 and the problem stills. When I click the suspend button, the Ubuntu suspends normaly but after 1 or 2 seconds it turns on ...
0
votes
0answers
4 views

Wake up command as ordinary user

Yandex disk cloud drive daemon started via ~/.config/autostart/Yandex.Disk.desktop. It works well except the PC waked up after suspend. Yes, I work with /etc/pm/sleep.d scripts when I need to do ...
0
votes
1answer
3k views

Xubuntu 14.04, Power Manager, Screensaver

When my computer is inactive, I keep getting a black screen and the screen goes into locked mode asking for a password, even though in Power Manager I have "Never" set for actions and monitor and ...
0
votes
0answers
70 views

14.04 - Laptop screen goes blank when lid shut

I'll be totally honest, I have googled this question...I have read responses...but I'm still pretty confused...anyway... So, anyway, I want to hook up my laptop with HDMI to my TV...that part works ...
6
votes
5answers
9k views

Prevent screen turning off when watching video in XBMC [closed]

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
70 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
133 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 ...