Questions related to power management, particularly power saving measures.

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2
votes
2answers
4k views

Unity won't suspend on inactivity

Running 12.04. I can manually suspend the system and wake it up again, but I can't get it to suspend on inactivity automatically. I have it set to "Suspend when inactive for" 10 minutes in ...
1
vote
1answer
343 views

How to configure an Ubuntu virtual server and VMWare ESXi5 the way VMWare would be able to shut it down properly?

I run an Ubuntu 12.04 server as a virtual machine on a VMWare ESXi 5 server. I've configured VMWare to shut the quest machines down the sane way (with an ACPI (if I understand it righ) shutdown ...
1
vote
1answer
264 views

Automatic Power On After Suspend

With every laptop I've had which had Ubuntu installed on it, first my Acer Aspire One and then my Dell Inspiron 15R, when I close it, it goes into suspend mode. When I open it, it attempts to power ...
3
votes
1answer
782 views

How do I make brightness settings persist across rebooting?

I'm using 12.04 with up to date packages running on a Dell Inspiron N4030 laptop with an ATI Radeon HD 5400 graphics card. I'm using the new Catalyst 12.6 graphics driver (this version already fixed ...
1
vote
1answer
7k views

USB hub not working properly Ubuntu 12.04

USB hub acting strange on Ubuntu 12.04 LTS. On Windows all devices are working properly, but on Ubuntu there are several issues, so it is not hardware issue. HDD is not recognised, unless it is the ...
2
votes
1answer
530 views

How do I show grub when resuming from suspend?

I have a Sony Vaio laptop, that came pre-installed with Windows 7. I resized the windows partition, then set up a dual boot scenario with Ubuntu. I've noticed that when I run Windows and put the ...
1
vote
0answers
615 views

Shutdown button not working [closed]

I have 12.04 installed on my laptop. It was working perfectly until yesterday. Since then, no matter whether I choose restart shutdown or suspend option from GUI, my computer suspends. Please give ...
7
votes
3answers
438 views

Hard-drive fails to boot if suspend was activated prior to restarting. Booting a live USB/CD fixes the issue (temporarily)

I am running 12.04 64-bit and am dual booting with Win7, for full disclosure, although I suspect that has nothing to do with my problem. The boot-loader(GRUB) fails to load often and I will be ...
1
vote
1answer
302 views

My Lenovo W500 resumes from suspend prematurely

In both Ubuntu 10.04 and 12.04, a perfectly happy sleeping laptop is woken when moved. Either the HD-shock detection, the trackpad or a sloppy key will wake it when the lid is closed. To test this I ...
2
votes
3answers
3k views

Why does battery power drain quicker in Ubuntu compared to WIndows in Dell Inspiron? [duplicate]

Possible Duplicate: Why does my computer get less battery life with Ubuntu compared to Windows? When I used Windows 7 with Dell Inspiron, I got a battery life of 2 hours. But ever since I ...
0
votes
1answer
942 views

Extremely short battery life

In Windows, my battery lasts several hours. In Ubuntu 12.04, it's dead before an hour and a half. I've installed http://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-management.html but it has ...
1
vote
2answers
5k views

Battery not charging beyong a certain percentage

After checking two HP Laptops, one relatively new, only 2 months old and the battery is less than a week old. The other one is about a year old. both have the same issue. The laptop's battery charges ...
2
votes
1answer
1k views

Will computer being shut down due to power failure affect my system files, or speed in any way? [duplicate]

Possible Duplicate: How resilient is Ubuntu to repeated “power-off” shutdowns? I've asked before as well but need to confirm again, in my country there are a lot of electricity ...
0
votes
1answer
666 views

Will not shut down

My Dell Inspiron 1720 Laptop with 12.04 with latest updates will not shut down when commanded off. After each upgrade it will probably turn off once, the next time it is commanded off, it will shut ...
1
vote
0answers
219 views

Ubuntu won't suspend automatically any more [duplicate]

Possible Duplicate: Unity won't suspend on inactivity In the last month or so, Ubuntu (12.04) has stopped sleeping automatically. I've gone to System Settings > Power, and verified (and ...
1
vote
1answer
736 views

Can't find “/sys/devices/system/cpu/sched_mc_power_savings”

I'm currently working on Ubuntu 12.04 x64. A lot of manuals about power saving in Linux tells about using parameters /sys/devices/system/cpu/sched_mc_power_savings and ...
37
votes
1answer
27k views

Is “laptop-mode-tools” still relevant for 12.04 and the 3.x kernels?

I'm using Ubuntu 12.04 x64 and trying to choose power management software. Laptop-mode-tools have a lot of features, but the only reason why I'm worry about is that it's manual and config files are ...
62
votes
17answers
60k views

How to prevent my screen from either dimming or the screen-lock starting when watching YouTube?

My screen brightness used to dim after a few seconds to preserve battery. This is default in Ubuntu 12.04. However when watching video it should not dim. This works correctly when I watch videos ...
3
votes
1answer
4k views

How to analysis the output of powertop to increase battery lifetime

I'm new to ubuntu using 12.04LTS .Please help me by steps.Thanks all. anoy@ubuntu:~$ cat /proc/sys/vm/laptop_mode 5 PowerTOP 1.97 Overview Idle stats Frequency stats Device stats ...
-1
votes
2answers
1k views

MacBook air 3.1 ubuntu 12.04 won't suspend when closing lid, after installing nvidia driver

I just installed Ubuntu 12.04 on my MacBook air I had a small graphic problem described here: Recent LCD trouble with 12.04 on 2010 Macbook Air 11 (3,1). So I followed the answer and installed the ...
0
votes
3answers
3k views

sudo shutdown vs pressing power button

I have a headless Ubuntu server running 64 bit Ubuntu 12.04 server edition, and I connect to the server via SSH from my Windows laptop. Sometimes when I would like to turn off the server and my ...
0
votes
0answers
25 views

Computer reboots when battery is critically low [duplicate]

Possible Duplicate: How do I set the computer to suspend when battery is critically low? I am using Uubntu 12.04, and I've noticed that the computer reboots instead of suspending when the ...
1
vote
2answers
3k views

Hibernate Option not available in Ubuntu 12.04

My Ubuntu 12.04 is missing Hibernate option so after searching a little on Google I came to know that this can solve my problem sudo nano ...
0
votes
1answer
141 views

How do I resume my session?

I have a desktop computer running Ubuntu, which is a very powerful system and I don't want it on all the time, so I would like to use the Suspend feature, but there is one problem: My computer won't ...
13
votes
4answers
7k views

Netbook performs hard shutdown without warning on low battery power

My Asus EEE netbook performs a hard shutdown when it reaches low battery power, without giving any warning - i.e. the power just goes off, without any shutdown process. I can't find anything in the ...
2
votes
1answer
942 views

How to disable automatic shutdown on UPS battery?

I have a UPS which is configured with Apcupsd. It shows all the stats correctly. The problem is that when I switch to battery mode, something sends a shutdown signal to the PC. My guess is that it ...
4
votes
6answers
6k views

Battery management doesn't recognize removal of power supply

I have a Lenovo Y460p running Ubuntu 12.04 (64-bit). The battery does charge normally, but unplugging the power supply only very briefly shows the correct battery indicator. After about 1 second, it ...
3
votes
1answer
2k views

Is Xubuntu as power-efficient as Ubuntu?

I'm wondering if Xubuntu has the same features as Ubuntu 12.04 Particularly I'm trying to get the most battery life out of my laptop. Does Xubuntu 12.04 feature the same improvements to power ...
0
votes
3answers
7k views

Wireless card power management

I have noticed that when my computer in plugged in, the wireless strength increases. I'm assuming this is to do with power management. Is there a way to disable Wireless Power Management? I have ...
1
vote
2answers
890 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
883 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
565 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
316 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
825 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
14k 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
974 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 ...