Questions related to power management, particularly power saving measures.

learn more… | top users | synonyms (1)

0
votes
0answers
21 views

Customise Suspend operation or create custom power option?

So basically I am using Ubuntu saucy salamander and I would like to be able to wake it from suspend over wireless. I can already do it when it has a wired connection but this doesnt really fit my ...
0
votes
1answer
108 views

Mouse turns off after a few seconds (Ubuntu 13.10, Windows 8.1) [duplicate]

I tried lsusb and I can see my mouse in the list. I tried for foo in /sys/bus/usb/devices/*/power/level; > do echo on > $foo; > done But I got this reply bash: ...
0
votes
0answers
25 views

Help Plz. Screen Power Down & Lock Will Not Work.

So I have a problem here. I have it set so that my screen turns off after 30 mins of inactivity and so that the screen will lock after the screen is turned off. Only thing is is that it is not ...
3
votes
2answers
588 views

How to shutdown Ubuntu after (2 hours) of idle?

Running: Xubuntu 14.04 32bit. I have read several outdated, not working, working different that I want answers here and elsewhere. I had a script that resulted in shutting my Laptop down at boot time ...
0
votes
0answers
54 views

How can i change startup applications in Lubuntu

I installed xscreensaver in lubuntu 13.10 and it wont start up auto. Neither will my power manager (using a laptop) I do not see "Startup Apps" anywhere
1
vote
1answer
55 views

Laptop does not stay suspended/hibernated

I have a Toshiba Satellite C855D-S5307. The computer came with Windows 8 and all the power functions seem to work fine with Windows. Whenever I install Ubuntu 13.10 (or any equivalent ie. Linux Mint, ...
0
votes
0answers
161 views

Why is my WiFi so slow?

I have an Alienware M14x-R2 laptop that I use with dual-booting Windows 7 / Ubuntu. In Windows 7 I have no problems with it at all, but I don't have any of my important software set up in Windows so I ...
1
vote
2answers
190 views

Fans are always running

Whenever I turn my laptop on my fans are running as if I was playing a game. The air coming out is cool, none of my computer parts are warm. I am running Ubuntu 13.10 and I have a Dell Inspiron 3521. ...
1
vote
0answers
103 views

Why do some of my powertop commands not work

I'm trying to make my powertop tweaks permanent. I ran sudo powertop --html and the I have a list of the commands I need to add to /etc/rc.local. I added them to /etc/rc.local and most of them work, ...
0
votes
0answers
45 views

Poor battery life: cron jobs running even in suspend

I was trying to figure out why my battery was dying out really fast even when in suspend mode. I noticed that my cron jobs run even when my laptop is suspended. I do not want this behavior. Cron ...
6
votes
1answer
529 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 ...
0
votes
0answers
87 views

AC power plug/unplug events

Running Ubuntu Server 13.04 (kernel 3.8.0-19-generic)* . I want to react when AC power is applied or removed. I can query the state correctly either through acpi -b or cat ...
0
votes
1answer
29 views

can't reconnect via ssh

Pretty sure I'm doing it wrong, but I'm not at home right now and while using an ssh connection to my computer, my connection closed and I can't reconnect. I'm about 90% positive that my computer shut ...
1
vote
0answers
21 views

slow machine when waking from suspend

I am using xfce4-power-manager to take care of screen locking and suspend when I close the lid of my laptop. It's a great little utility! However, when the machine wakes from suspend (which is to ...
0
votes
0answers
294 views

Lenovo IdeaPad U430 Touch battery not charging, tlp installed with no acpi_call module

I have recently purchased a Lenovo ideapad U430 Touch. I have successfully installed Lubuntu 13.10 with Kernel 3.11.0-18-generic. Everything has been relatively painless. I've installed tlp for ...
1
vote
0answers
85 views

How to stop battery from overcharging? [closed]

I am new to Ubuntu, since I switched from Windows8. I have an ASUS x402c laptop, so I can not remove the battery from it. On Windows8 when the battery was fully charged, Windows automatically switched ...
0
votes
1answer
111 views

How-to stop computer locking when lid closes?

Here are my power settings: How do I stop the computer locking when I close the lid?
0
votes
1answer
33 views

Laptop turns off on its own in 13.10?

I recently upgraded to 13.10 from 12.10. It's now showing the battery info wrong and it keeps turning off even with 60% of power remaining, and without warning. When I resboot the PC, it works fine ...
0
votes
0answers
96 views

Keyboard doesn't work after waking Ubuntu from suspend, wakes automatically after opening lid

I have Ubuntu 13.10 installed on Toshiba P55-A5200. The keyboard doesn't work after waking it up from suspend, so I have to restart it. Also, whenever I open the lid it wakes up without me pressing ...
0
votes
0answers
25 views

How to have different screen dimming profiles for AC & battery (13.10)

This has been asked before but not yet answered: I'm looking for a way to have a different timeout for screenlock & dimming depending on whether I am on AC or battery power. Currently the only ...
0
votes
0answers
60 views

Ubuntu 13.10 Saucy false low battery warning

When I unplug my charger from the computer, about 80% of the time, I get a low battery warning saying my computer is about to suspend (when I'm fully charged with a brand new battery. Clearly the easy ...
2
votes
0answers
99 views

Prevent resume from suspend on lid open for 14.04

I'm running Ubuntu 14.04 on an Asus n550jv. I had this problem in 13.10 also. I want to disable resume-from-suspend when the laptop lid is opened. The traditional answers to this involve echo "LID" ...
1
vote
1answer
78 views

Get information about my PSU

I want to know what kind of power supply I have and what wattage it has. I tried: sudo dmidecode -t 39 but that didn't show any specs. What do I need to do? I am on Ubuntu 13.10
0
votes
0answers
41 views

Power actions don't work as they are supposed to?

I want to change closing lid and power button actions so I used Power Management in the settings, I've changed "when lid is closed" to do nothing in both AC and Battery, and "power button action" to ...
0
votes
0answers
21 views

port power related function is not calling while the insertion/removal of usb device from usb port

I trying to understanding the usb power manageent , while debugging there is no port power function is called while the insertion/removal of the usb device from the usb port. I am also trying to ...
0
votes
0answers
138 views

My Laptop Not Charging And Brightness Keys Not Working After Installing Ubuntu 12.04.3 LTS

I have Lenovo(G-505s) Laptop with per-installed windows 8. Recently I'm installed Ubuntu 12.04 through CD. But after installing my laptop battery not charging and my brightness keys not working in ...
0
votes
0answers
15 views

Ubuntu consumes more power than Windows-What to do? [duplicate]

I want to install Ubuntu on my Dell Inspiron 15 (i3). However, I found that the battery drains much faster than Windows 8. I read that Windows controls load to the processors, graphics card and fan, ...
1
vote
0answers
101 views

Hibernate dialog apears but doesn't hibernate?

Followed this Question and now whenever I press the button hibernate it just take me to the login screen. For critical battery I wanted it to hibernate on specific battery % and for that I followed ...
1
vote
0answers
7 views

unable to edit settings for dirty memory

Ive been reading for quite some time on trying to edit the dirty memory settings and for some reason i cant save changes to any of the files even when I use sudo. The biggest reason I want to change ...
0
votes
2answers
348 views

Fan is constantly on when plugged, but goes silent when only on battery

Problem Fan is constantly on when a laptop is plugged and not charging. Not noisy, but definitely audible. However, it occasionally stays silent (spinning slower or not spinning at all) when laptop ...
1
vote
0answers
100 views

Ubuntu 12.04, asus f550c : it do not go in power save mode

If I remove the charger from my laptop asus f550c, it do not go in power save mode, as I can see from the applet CPU frequency scaling indicator Indeed, usually if I suspend the laptop, it has very ...
0
votes
1answer
40 views

Scheduled Power On/Off of 2nd HDD

im using a ubuntu 13.10 Server. I want to switch off the 2nd HDD completely and only power it up once a week to back up the system+data from the 1st HDD. I know how to use crontab, but I dont know how ...
1
vote
1answer
528 views

Ubuntu Battery not charging or not detected

Here is question/answer just to help the community. I just bought a new ASUS N750J . I had some issues installing kubuntu. Problems were the CPU FAN always running at full speed, battery not ...
0
votes
1answer
41 views

PC System Status Bios visible through shell?

I am looking to view some settings that are visible through the bios in the command line. Our system has a built in holdup charge (shows SUSV status in bios) that I would like to poll regularly for a ...
2
votes
2answers
1k views

Cannot increase wifi card power using iwconfig

So I set up a hotspot using hostapd, isc-dhcp-server and MASQUERADING. The hotspot works and I can access Internet. Problem The connection speed is too slow. When I connect to my hotspot (via ...
0
votes
1answer
45 views

How do I guard ubuntu for power outage?

I develop industrial equipment with embedded PC and Ubuntu 12.04.3. Web server(apache) and DB(sqlite) running automatically when I turn on this PC. User can't shutdown in the correct sequence. ...
0
votes
2answers
476 views

My laptop SUDDENLY doesn't turn off screen, when closing lid

I installed Ubuntu 13.10 on my Vaio Pro 13 back in october, 2013. Ever since everything has worked flawlessly. Now yesterday when I closed the lid(as normal), I noticed that my screen and computer ...
0
votes
0answers
82 views

How to change/customize boot settings in grub, so that ubuntu fully recognizes the hardware it runs on?

I've got a problem with Ubuntu 13.10 on my laptop Acer Aspire 5750ZG. It cannot recognize that it is running on laptop - there is no battery indicator, power consumption is very high. Simply ...
1
vote
1answer
165 views

Suspend on lid close, even with the option OFF

I've set up a friends laptop with Ubuntu 12.04LTS with the Cinnamon desktop, and I'm having a few issues with the power settings. As far as I can tell I've got every setting to "Do Nothing" when the ...
0
votes
0answers
82 views

usb drive spin down

I have 2 usb hdd drives connected to my notebook with ubuntu 14.04, each of them spin down after ~10minutes. I need to make them always in active mode (no spin down). I tried sdparm and hd-idle, but ...
2
votes
2answers
41 views

Stop process on power button press

I have an old ubuntu pc running a minecraft server, but I only want it on at certain times. I want to be able to turn it on and off using only the power button. I am able to turn it on, but to turn ...
-1
votes
1answer
171 views

Battery drain after dual booting windows 8 and Ubuntu 13.10 and Sleep problem in windows

New to the forum here, had hoped for a better beginning to the open source world then this. I had never installed Ubuntu before until a week back, followed all the precautions so that I didn't fall ...
2
votes
2answers
86 views

Crash after modifying rc.local file to solve overheating issue

I made a dual boot on my laptop with Windows 8. After installing Ubuntu, I notices that my laptop was really hot, and realized that both GPUs are working, my integrated Intel GPU and secondary NVidia. ...
1
vote
0answers
59 views

Screensaver not activating in 13.10

I'm running Ubuntu 13.10 64bit and the Unity desktop environment. I have my screen lock settings configured so it will blank the screen after 5 min. and lock it imediatly. The problem is it doesn't! ...
2
votes
1answer
266 views

Desktop hard drive won't spin down according to settings

I have a desktop machine with two SSDs, one each with Windows 8.1 and Ubuntu 13.10, and one HDD which contains a single NTFS partition on which I throw big files. It actually only rarely gets used and ...
1
vote
0answers
58 views

How can one increase the timeout before the display dims when on the battery?

If I do not touch my computer (a Toshiba Satellite) for 15 seconds when running off the battery, the screen dims to the lowest brightness. I have already disabled "Dim screen to save power." I do not ...
2
votes
1answer
87 views

WOL - Ubuntu 12.04 LTS Power computer off, computer turns back on

I have an GA-B75M-D3H Gigabyte motherboard with an i3 processor that I'm using WOL from a windows machine to start the computer. The WOL is working fine but the issue is when I power the computer off, ...
0
votes
1answer
30 views

low on battery mode

On my lenovo laptop with Windows installed, when my battery was almost empty, it went in sleep (or some sort of sleep mode). so that if i gave it power again, it restarted back to windows with all my ...
0
votes
1answer
89 views

powertop html file not providing echo commands

I have been trying to improve the power consumption of my Lenovo Z580 running Ubuntu 12.04. Powertop looks like one promising lead and I have been following the instructions provided here: How do I ...
2
votes
3answers
893 views

battery discharges in a strange way on Lenovo Ideapad Z500

I've a Lenovo ideapad Z500 laptop with Windows only energy management software (my battery stop charging at 60% for long lasting life). Setting the threshold from Windows, it remains also with Ubuntu ...