Questions related to power management, particularly power saving measures.

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0
votes
1answer
517 views

USB ports at 10Volt

There is a small "driver" from asus, AI Charger, that turns the PC's USB ports into 10V power supplier, which allows me to charge my iPad from my computer. Problem is, this only works on windows. Is ...
2
votes
6answers
5k views

Why is my laptop getting hot using Ubuntu

I switched from Win7 to Ubuntu and found that my laptop is getting too hot. (very hot). When I was using Win7, it was very nice, cool. Why this is happening and how do I fix it. details: Lenovo ...
0
votes
2answers
675 views

Excess power consumption in Dell laptop

I have bought a new Dell laptop, with 6 GB RAM, running 64 bit Ubuntu 11.10. I have both Windows on one partition and Ubuntu on another partition. When I use Windows, battery lasts for more than 2 hrs ...
5
votes
1answer
2k views

Lenovo ThinkPad L520 slows down when AC power adapter is plugged in

I have a new laptop Lenovo ThinkPad L520 (7859-5BG) Core i5-2520M(2.5GHz) with 4GB RAM. Having installed Ubuntu 11.10 32-bit, while browsing with Chrome on GNOME classic (no effects), I noticed 173% ...
1
vote
2answers
4k views

Turn-off WiFi / WLAN & Bluetooth completely (electrically off), how?

In windows, most laptops these days have a hot-key to turn off wireless modules completely (i.e. airline mode), including WLAN and Bluetooth. I am currently on Ubuntu 11.10, and wondering as to what ...
1
vote
1answer
288 views

When plugged in my laptop's CPU load gets higher

When I plug in my laptop (Asus EEE pc with brazos) it can't play a movie without lagging. When I unplug my laptop from the power socket, the lag goes away. I'm a bit baffled by this because I ...
2
votes
1answer
1k views

Why does powertop think I have two displays?

Ok, so in powertop (version 1.97), in both the "overview" and "device stats" sections, I see two devices, each called "display backlight". One shows the correct percentage of use, e.g. if I lower ...
10
votes
2answers
8k views

How do I check if last shutdown was clean?

How can tell that my last shutdown was properly done in Ubuntu 11.10 or if the machine was powered off before shutting down the OS?
3
votes
1answer
529 views

Is there a way to run the laptop only on AC power without removing the battery?

Is there a way possible to run a laptop only on AC power without having the need to remove the battery i.e. to disable the charging as it is possible in Windows 7.
2
votes
1answer
258 views

Autodim does not un-dim when I start using the computer again

On my MacBook 2,1 with Ubuntu 11.10, whenever I leave the computer alone for five minutes, it blacks out and wont respond to any keypresses or even the power button. UPDATE: It was the autodim ...
2
votes
1answer
612 views

Ubuntu Logs off on shutdown, Proper shutdown/restart too doesnt work

I don't know what i did or what happened? but my ubuntu logs off on clicking shutdown... running the shutdown or reboot command too doesn't shutdown.... how can i find the log? all i know is there ...
0
votes
2answers
2k views

Suspend USB power to a laptop cooling pad when going to suspend mode

When I suspend the laptop, the USB devices are left on. I don't mind this in general, however I'd like to be able to turn off the cooling pad under it. I tried the things outlined in the following: ...
3
votes
2answers
481 views

use setpci to restart ubuntu server after power failure on macbook

I installed ubuntu server 11.10 on my macbook 1,1. In order to reboot after power failure I have to set a specific "AFTERG3" bit using setpci. The solution for a macMini can be found here: ...
8
votes
1answer
4k views

How can I set my system to suspend when inactive to a longer amount of time

I run Mythtv on some Ubuntu 11.10 based machines. In the power settings, I can choose from a list of time periods from 5 minutes up to 1 hour for the the machine to suspend when inactive. I would ...
4
votes
5answers
8k views

Does Jupiter really improve battery power?

I installed Jupiter on Ubuntu 11.10 and set the preference mode to "Power Saver" but haven't seen any noticeable difference. Does it really do what it claims?
4
votes
3answers
1k views

Is there a power saving way to download torrents?

I usually download my torrents at night, while I'm sleeping. But when doing so, Ubuntu loads the entire desktop interface, while I only need the torrent client. I would like to use an energy saving ...
0
votes
1answer
1k views

How to get rid of low battery warning message?

My application running on a laptop-like device is controlling battery status on its own but when laptop battery is critically low Gnome Power Management message box appears: As my GUI style is ...
13
votes
3answers
6k views

Will final version of 12.04 use the power management changes found in kernel 3.3

I have seen in some version of Ubuntu that instead of making a huge change to update to the latest kernel, they take some of the good stuff out of it, for the sake of stability and put it on a ...
2
votes
1answer
355 views

Battery being guzzled, and drained faster than Windows OS, by alot

11.10, has it been tested with Sandy Bridge processors? I'm asking this, mainly have no idea why my computer under Ubuntu lasts only 2 hours (screen closed) but when under Windows 7 Home, it lasts ...
6
votes
1answer
4k views

Intel HD audio codec power management

Is it possible to enable power management for intel-hda sound card audio codec ? Power management for the card itself works fine, but audio codec module (/sys/module/snd_hda_codec) doesn't seem to ...
1
vote
1answer
768 views

Xubuntu: Screen idle-dims after lock+new login although not idling [closed]

I set my screen to dim after 2 minutes idling on battery in XFCE power settings. If I lock and click new login, and log in as another user, the screen will dim after 2 minutes even though that second ...
3
votes
2answers
4k views

Power saving with free Radeon (ATI) driver

I'm using Ubuntu 11.10 without the proprietary driver for ATI video cards and I like very much the performance. My only need is activate power saving when I use the laptop with the battery. Thanks
1
vote
0answers
149 views

What can I do to diagnose my ThinkPad R60 locking up when connecting power adaptor? [closed]

I move my laptop between places in my flat quite a bit for this I've got multiple power adaptors connected to outlets in two rooms. Now every now and again (I can't see a pattern) when I move the ...
302
votes
8answers
245k views

How to enable hibernation?

In Ubuntu 12.04 and newer, hibernation has been disabled by default in policykit. How can I enable this back?
1
vote
1answer
306 views

Run anacron even when on battery (laptop)

There is a known behavior of anacron not to run when the laptop is running on batteries. Is there any way to stop this behavior and run anacron whatever the power state? ...
29
votes
5answers
20k views

Why does my computer get less battery life with Ubuntu compared to Windows?

Last year I purchased a Dell Inspiron 5315 laptop shipping with Windows 7 preinstalled. I installed Ubuntu 10.10 alongside it with dual-booting. On upgrading to Ubuntu 11.10, I was upset to find I now ...
3
votes
2answers
327 views

How do I repair the shut-down/Log-off button?

I use the computer with 2 users. With one user all works fine. With the second user account, the shut down and log-off buttons do not work anymore while screen locking standby and hibernation still ...
16
votes
1answer
7k 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 ...
1
vote
3answers
3k views

How to save energy?

I just want to get some advices howto save energy on my new laptop. I already installed a kernel patch. On the picture below you can see, that i got less minutes of time than percentage. Only ...
1
vote
0answers
384 views

Getting screen blanking working with Ubuntu 11.10 under Unity [closed]

I want screen blanking after 10 or 30 minutes, but at present the screen doesn't blank at all. This has been an issue since upgrading to 11.10. At present, even after a couple of hours, the screen ...
2
votes
1answer
613 views

How do I get Ubuntu to ignore power button presses?

I've got a small media server that sits under my TV, and it runs Ubuntu 11.04 desktop x64 with XBMC on top. I've got a problem in that unknowing users / visitors occasionally press the power button ...
2
votes
2answers
2k views

Hibernate on power button - login screen

Every once in a while my SO-User (significant other user) leaves the computer but doesn't hibernate it. I want to push the power button to save some energy, but as I'm not in her session, the computer ...
1
vote
1answer
2k views

Are there power plans for Ubuntu like in Windows 7?

Please people anyone if can help me. I'm new to ubuntu, I mean have work with it since 11.04 come out. My only problem is battery life. In windows 7 I have balanced power saver and high performance is ...
3
votes
2answers
2k views

My Laptop Battery Does Not Charge

I am using a HP Pavilion and Ubuntu 11.10. I have been using Ubuntu for about a year. Recently (in Nov or there about), I noticed my battery never charges fully no matter how long it has been ...
2
votes
1answer
504 views

Is the HDD spinning when it is unmounted?

Have a PC with multiple HDDs some used only for backup. Should I leave them unmounted? IS the power consumption less when the HDD is unmounted? Do the HDDs spin when unmounted? Thanks a lot
1
vote
1answer
1k views

How to determine / make sure whether hard-disks have spun down when using “hdparm” options?

I want to spin down some hard-disks when they are idle. So I used hdparm package. In the /etc/hdparm.conf I added following lines: command_line { hdparm -Ss 241 /dev/sda } My intention was to spin ...
0
votes
2answers
890 views

Fan is always on on a Toshiba L300, is this normal?

I've installed Ubuntu 11.10 on my Toshiba l300 and I have a problem with the fan which works constantly and this is unusual...Have you got the solution?
4
votes
1answer
849 views

Why is Ubuntu so power-inefficient? [duplicate]

Possible Duplicate: Battery drain on ubuntu is fast I'm currently getting 7–8 hours of battery life whilst using Windows, but I only get about 3 hours in Ubuntu? Why the big gap? Some ...
0
votes
2answers
428 views

How to install this kernel?

I have a Samsung notebook with Core i3 Sandy Bridge processor and I want to install the patched kernel available here: https://wiki.ubuntu.com/Kernel/PowerManagement What Kernel version should I ...
1
vote
1answer
2k views

Which application controls the power management?

I'm using xmonad in Ubuntu Oneiric without the Unity desktop. In 11.04 I launched manually the gnome-power-manager for controlling the laptop battery but in the new Ubuntu this application is no ...
0
votes
1answer
453 views

Power consumption issue with Kernel?

I have aquired a Samsung notebook, model RV420 (Core i3 Sandy Bridge), acording with the specifications the battery should work for aproximatly 6 hours, but in fact his duration was 2 hours and 45 ...
6
votes
1answer
2k views

Customize the power button action (ubuntu 10.04)

I would like to customize the power button action. The tutorial at http://blog.metalight.dk/2010/07/ubuntu-lucid-custom-power-button-event/ works but not always (the number of shutdown processes can ...
1
vote
4answers
788 views

Is there a non-mono alternative to power saving tool Jupiter? [duplicate]

I'd like a power saving tool similar to Jupiter but without all the mono dependencies. Does it exist?
2
votes
1answer
801 views

Wake up from sleep on HP Envy 14

I'm not familiar with laptop power management internals, and I have a bit of a problem with Ubuntu 11.10 and HP Envy 14. Waking up from sleep (opening the lid) causes a cooler to spin on maximum ...
12
votes
3answers
3k views

Stop laptop from suspending when closing lid in lightdm

How do I stop my laptop from suspending when closing the lid under lightdm - the power management settings in xfce or gnome 3 does not seem to apply when the window manager is not running.
6
votes
4answers
18k views

How can I prevent iwconfig power management from being turned on?

I am affected by this bug: 869502. A workaround which seems to stop the kernel panics for me is to disable wlan0 power management: sudo iwconfig wlan0 power off However it seems to automatically ...
4
votes
1answer
2k views

How can I make the battery icon appear in my gnome-3 panel only when charging or discharging?

I am using ubuntu 11.10. There was an option for the same in 11.04. I found a suggestion listed here. Unfortunately, it does'nt work. $ GSETTINGS_BACKEND=dconf gsettings set ...
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 ...
1
vote
2answers
1k views

Dell Dimension 3000 goes into sleep and won't wake up

I installed ubuntu 11.10 on my old desktop Dell Dimension 3000. The installation went well except that I noticed that it installed the OS on the 1T external USB disk. The problem I am seeing is that ...
1
vote
0answers
379 views

Battery Monitor Not Showing on boot up of Ubuntu 11.10 [duplicate]

Possible Duplicate: No battery status icon When I boot up Ubuntu 11.10, my battery monitor does not show up, it only does when the battery is low, or I plug in my power cord. I want it to ...