Questions related to power management, particularly power saving measures.

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1
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2answers
886 views

High temperatures dual AMD GPU Llano

i got a problem. I tried a lot of distributions (ubuntu, lubuntu, xubuntu, kubuntu too) and i've the same problem on everyone of them: I always have high temperatures caused (i think) by dual GPU ...
5
votes
2answers
4k views

What prevents setting ATI / radeon power_profile from boot and retaining it after suspend?

I'm successfully using the open source radeon driver and use KMS-power_profiles (see link below) for power management of my graphics to prevent overheating. But I can't manage to set the power_profile ...
2
votes
0answers
115 views

How can I radically mimimize power usage when I need to conserve battery? [duplicate]

Possible Duplicate: Laptop minimal power consumption tweaks I often work from locations where I don't have a way to plug in my laptop and I need to get some single thing done. I'm looking ...
4
votes
0answers
78 views

How do I disable all lid close processes? [duplicate]

Possible Duplicate: How can I tell Ubuntu to do nothing when I close my laptop lid? I want to be able to close my laptop without Ubuntu registering it. I've been looking everywhere and I've ...
5
votes
1answer
1k views

Laptop shuts down upon waking from suspend

The computer enters suspend either by closing lid, choosing suspend from the top-right drop down, or hitting the power button and pressing suspend. It doesn't matter. I then attempt to wake the ...
1
vote
1answer
540 views

Not able to configure graphics

I bought a new Dell Inspiron 5420 with 11.10 preinstalled. I am not able to configure my graphic settings. how do i check whether my nvidia graphics is working or not? how to check my intel ...
5
votes
2answers
4k views

Why does Ubuntu have about 2x shorter battery life than OS X on MacBook?

Ubuntu 12.04 has about 2x shorter battery life than OS X on my MacBook Pro 2010. What are the technical reasons for this? Is it because OS X uses some hidden firmware features? Can Linux somehow ...
3
votes
4answers
3k views

xubuntu 12.04 restarts after suspend - only from my account

After installing a clean xubuntu 12.04 I noticed that when I suspend, the computer suspends and turns itself off (you see the lights go off, and a click sound from the HD or fans), but then about 2 ...
2
votes
2answers
880 views

Slice battery causing suspend and power issues on Lenovo X1

I have a Lenovo X1 i5vPro 2.50Gh x 4, which works fine with 12.04 LTS 64.... except the right click on the touch-pad, which I can live with.. However, I have just bought a Genuine Lenovo 39+ slice ...
0
votes
1answer
592 views

How to make an Asus G75 laptop more energy savvy

I just bought an Asus G75 and the battery is lasting less than 2 hours, even when doing nothing. I read somewhere that energy saving is not efficient on linux, at least by default. Is there something ...
5
votes
1answer
95 views

How green are Ubuntu and Canonical?

im a student of Environmental Engineering, currently searching for a Bachelor Thesis Theme. I am curious, if there any internal information about Ubuntu related to CO2/Energy saving compared to other ...
4
votes
1answer
2k views

Can I stop battery charging at say 80% and switch to AC?

While I was looking for a battery management utility for my Dell E5420, I came to read this post - How can I limit battery charging to 80% capacity? . Sofar, I haven't found one that relates to my ...
3
votes
1answer
555 views

How would you unsuspend a computer using a bash script?

How I can unsuspend my computer with a bash script like: #!/bin/bash pm-suspend sleep 10m {unsuspend command}
1
vote
0answers
311 views

Problems with secondary battery [closed]

I have a problem with my secondary battery. Some time ago, I closed my notebook lid (an HP Probook 6450b). When I opened it again, the notebook didn't wake up from standby mode because my first ...
3
votes
2answers
821 views

How can I improve the power consumption of the open source AMD graphics drivers?

How i can optimize the power consumption of the open source radeon driver? I don't want to use official amd driver cause of an error with sleep mode. AMD E-450 cpu\gpu.
2
votes
1answer
4k views

No Battery Indicator in panel 12.04

On ac power or battery power, I cannot get a battery status indicator to show in the 12.04 panel. I have tried: 1) Checked the Power Settings and battery is set to show all the time. 2) sudo ...
10
votes
3answers
13k views

How do I prevent an external monitor from shutting off when closing my laptop lid?

I've seen this issue on previous versions of Ubuntu, but not on 12.04 and some of those are resolved bugs, so I'm asking again. I've set up power management so that, when plugged in, my laptop does ...
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 ...
1
vote
1answer
963 views

How to fix high PCI adapter temperature?

When running Ubuntu 12.04 LTS, my Acer Aspire 4530 laptop and its PCI temperatures are around 70 degrees Celsius not even an exterior fan does anything about it. How can I make it run cooler?
2
votes
0answers
162 views

Power management does not recognize removal of power supply! [duplicate]

Possible Duplicate: Battery management doesn't recognize removal of power supply I have a Lenovo Ideapad Z370 with Ubuntu 11.10 and the battery status indicator shows wrong information. ...
1
vote
3answers
2k views

How can I disable asus-nb-wmi when using battery power mode?

I'm trying to improve the battery life of my Asus U32U notebook. I'm running Ubuntu 12.04 64bit and using powertop it shows the following: PowerTOP 1.97 Overview Idle stats Frequency stats ...
2
votes
0answers
409 views

How to make that closing the lid hibernate the system even if there's a secondary monitor connected?

I enjoy my Ubuntu laptop and the automatic hibernate on lid closing. Unfortunately the hibernation doesn't take place when closing the lid while an external monitor is plugged in. The monitor is only ...
2
votes
1answer
250 views

Resume from suspend without waking up hd

I'm running Ubuntu 12.04 on my Laptop with two hard disks. The primary one is a SSD, whereas the second one is a spinning hard disk. Most of the time I don't need the second hard disk, I just use it ...
0
votes
1answer
213 views

Laptop camera (/dev/video) not there after suspend - reboot needed to get it back

Camera stops working on my laptop after suspend and wake. I have to restart to get it back. When listing the /dev/ directory there is no /dev/video after wake. Is there a way to get it back without ...
2
votes
1answer
1k views

Is there any way to get notified when battery is full? [duplicate]

I'm using Ubuntu 12.04 on a laptop, I was wondering if there is a way to get notified when the battery become full.
1
vote
2answers
458 views

Help Hibernate Ubuntu 12.04

I've add this following code to /etc/polkit-1/localauthority/50-local.d/com.ubuntu.desktop.pkla [Enable hibernate by default] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ...
0
votes
2answers
374 views

Brightness level is not restored back after some idle time when using fglrx

I have a laptop powered by fresh installation of Ubuntu 12.04 with XFCE. Before I have used a default opensource ATI driver. For several days I have been using fglrx. After some time of inactivity ...
0
votes
2answers
362 views

Boot problem Ubuntu 12.04

I installed Ubuntu 12.04 but the system crashed and now will not boot from the hard drive, I can only start from the CD ROM. I already formatted and reinstalled Ubuntu, but when I start a message ...
1
vote
1answer
145 views

modified suspend mode for ubuntu

Is it possible to put ubuntu (12.04) into a 'modified suspend' mode which basically works like the regular suspend, but allows me to run my vlc for streaming video through the network, while I am away ...
2
votes
2answers
3k views

ATI radeon mobility 3650 overheats and shuts down computer in Xubuntu and not Windows. Why?

I have recently installed Xubuntu 12.04 alongside Windows Vista on my Acer Aspire 6920G laptop. I installed the latest proprietary fglrx drivers for the ATI radeon mobility 3650. In Xubuntu I felt ...
0
votes
3answers
881 views

Power management issues on an Asus N55 [duplicate]

I noticed that with respect to Win7 on my Asus N55 Ubuntu 12.04 tend to overheat the system. After startup the fan controller takes control of the fan, I could here it slowing down, after a few second ...
1
vote
0answers
1k views

What is the reason for high power consumption on my Thinkpad T420s [closed]

I haven't seen this exact question posted or any related answers, so I'm re-posting. Here is the problem: After upgrading to Ubuntu 12.04 Precise Pangolin, my t420s laptop idles above 20 watts ...
1
vote
4answers
2k views

Ubuntu 12.04 doesn't resume after install nvidia drivers

I've install the nvidia drivers from the "Additional drivers" menu in the settings, and when I try to resume from suspend, I get black screen and I have to reboot for solve it. How can I fix it? ...
0
votes
2answers
2k views

What power settings can I use for Asus U32U-ES21 to achieve something close to the stated 10 hours battery life?

So when I got my Asus X32U Notebook, the first thing I did was delete windows and install 64bit Ubuntu 12.04 - which works great, however I only get around 2.5 hours on battery - nothing close to the ...
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 ...
1
vote
0answers
113 views

Power adapter is not seen in Ubuntu 11.10 [closed]

I have an Alienware M17xR3 laptop running Ubuntu 11.10, and there is an issue with my power adapter when it is plugged in after OS has already loaded (i.e. when I unplug it when at Ubuntu's desktop, ...
14
votes
6answers
22k views

How to save brightness settings?

After I upgraded my notebook to ubuntu 12.04, I found that I can not save my power settings. Every time I set the screen brightness to 70%, it restored to 100% next time. I can't find a save button on ...
1
vote
1answer
413 views

Unable to to view power statistics box in ubuntu 12.04

power statistics box cannot be viewed the second time it is tried to open. The box just shows blank.It doesn't appear even if left open for sometime.
0
votes
1answer
3k views

Auto Power On and Off

I have a old laptop set up as a media server with Ubuntu 12.04 on it. I was wondering whether it was possible to set a time for it to automatically turn off at night and then in the morning ...
0
votes
2answers
244 views

Battery charging is flickering [closed]

A few days ago my notebook started to bug around with charging the battery. When the battery is not absent notebook runs smoothly. Until I plug in the battery. Then it starts to charge but ...
3
votes
0answers
318 views

xfce4-power-manager keeps restarting after suspend

In a clean install of Xubuntu 12.04, the xfce4-power-manager keeps restarting after suspend. If i quit the program and restart it, it keeps restarting. If i quit the program and restartit a few ...
19
votes
4answers
60k views

CPU frequency scaling for 12.04?

In 10.10, I remember I had CPU Frequency Scaling Monitor by default. Now in 12.04, I cannot find anything similar in Ubuntu software center. I wonder what applications are recommended for scaling CPU ...
1
vote
1answer
344 views

Does anybody know if Granola does what it says or even if it's safe for Ubuntu?

I found a program called Granola, does it do what it says it does or is it even safe or even needed in Ubuntu 12.04 64 bit (It claims to save power by cycling down your system when the extra power ...
2
votes
1answer
631 views

When Installing nvidia drivers it doesnt resuming suspend

I'm using Ubuntu 12.04 and I installed recommended Nvidia drivers from "Additional Drivers." Now when I try to resume from suspend the monitor doesn't show anything and I have to restart my computer. ...
2
votes
2answers
742 views

is it true that ubuntu effect on hdd longevity?

is it true that "Ubuntu May Be Killing my Laptop's Hard Drive"?? Please explain(if possible). http://hardware.slashdot.org/story/07/10/30/1742258/ubuntu-may-be-killing-your-laptops-hard-drive ...
7
votes
6answers
14k 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 ...
10
votes
6answers
10k views

USB Mouse sleeping after 5 seconds when on battery [duplicate]

My usb mouse sleeps after 5 seconds of inactivity when running on battery power. It wakes uo again when i press any button on the mouse. This is really annoying. I have made lsusb, and I noticed my ...
3
votes
1answer
1k views

How to run a script after the system resumes from hibernate (suspent-to-disk)?

I have configured powernap to hibernate (i.e., suspend-to-disk) the machine if idle. In order to save additional power, I have configured my non-root, data disks to spin-down using the hdparm command. ...
1
vote
1answer
279 views

Is there any need to install amd graphics drivers if I am running Ubuntu Server?

I run Ubuntu server (12.04, 64-bit). Is there any need to install AMD drivers for my GPU? I do not intend to use any graphical environment, but I am wondering about power consumption. PS: This ...
5
votes
2answers
6k views

VLC does not inhibit screen blanking

I have an issue which could be a bug, but before reporting it, I want to make sure I'm not doing something wrong. When watching a movie with VLC on fullscreen, approximately in 10 minutes the screen ...