Questions related to power management, particularly power saving measures.

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3
votes
3answers
16k views

How do I add pcie_aspm=force to my boot options? [duplicate]

Possible Duplicate: How do I add a kernel boot parameter? I just upgraded to 11.10 from 11.04 on my laptop (I don't have Windows) by downloading from the Ubuntu website. The laptop battery is ...
14
votes
6answers
20k views

Laptop minimal power consumption tweaks [duplicate]

I've recently installed Ubuntu 11.10 on a new Lenovo X220 laptop with a 9-cells battery. I have a trans-atlantic flight coming up, and I would like to use my laptop during it. Lenovo claims that ...
6
votes
3answers
4k views

How do I get “restart” option in the shutdown menu in Unity?

The dropdown menu I get when I click on the gear link in the top right corner only shows these options: Lock Computer Logout Suspend Hibernate Shutdown There is no "restart" or "reboot". How can ...
0
votes
1answer
528 views

How can I tell if I'm affected by “The 11.10 Battery Power Drain”?

I've seen hints at some kernel power bug affecting battery life if updating to 11.10 -- as for example here. I relation to this, I have three questions: How can I tell if my machine is affected ...
35
votes
8answers
114k views

How do I completely turn off screensaver and power-management?

I looking for a method to turn-off the screensaver and powermanager but from the command line. I'm aware this can be done via the GUI screen - but can this be done via the command line or via some ...
2
votes
1answer
526 views

How to suspend my laptop when I close the lid? [closed]

Since I installed 11.10 the system does not suspend when I close the lid. In Power Management, the values for both battery and plug are set to suspend. When I just click on suspend, it works fine.
0
votes
1answer
590 views

11.04 -> 11.10 update problems (Power, Display, Resolution)

I have serious issues with Ubuntu (64 bit) after upgrading system from 11.04 to 11.10. My hardware: Asus G53SW (i7-2630QM, 8GB RAM, GF GTX460M) Power (UPower) - when I change behaviour of lid open/...
4
votes
3answers
5k views

Sound system is eating away the battery

In my laptop the sound code is running at 100% even when I am not playing anything. It is causing my palm rest to hit significantly. While I do not face the issue on windows machine where I am using ...
70
votes
7answers
107k views

How do I modify the options for the power button?

When I press the power button a dialog opens, but I want to shutdown the system without receiving "Do you really really want to shutdown?". How can I choose a direct shutdown action on a pressed power ...
3
votes
1answer
1k views

Display brightness goes two shades darker if I am idle for 10-11 seconds

The display brightness comes down 2 shades darker if I'm idle for 10-11secs!! It automatically dims itself :o and it's very distracting! Earlier this could be avoided through power management, by ...
3
votes
3answers
3k views

Computer shuts down when unplugged

I have an MSI Wind U100 netbook (they call it a notebook). Every time I unplug the AC adapter the machine shuts down as if the battery is dead. I get a notification that says "battery is critical and ...
1
vote
1answer
2k views

Replacing 11.10 gnome power manager with 11.04 or XFCE power manager

I am not too keen on the new 11.10 power manager control - there are less options I can tweak. Does anyone know how to replace the 11.10 gnome power manager/control with the one that comes with 11.04 ...
9
votes
1answer
3k views

Why is wireless down/strange after switching to battery or closing/opening the lid?

I noticed that, when I unplugged my laptop, or closed/opened the lid, my wireless connection dropped, every time. I tracked it down to pm-powersave, and made it stop, see below. This could also ...
1
vote
2answers
3k 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 ...
7
votes
2answers
1k views

Prevent temporally suspend/hibernate from script?

Is there any way to prevent temporally suspend/hibernate from a script? I want the screen to enter in powersave mode when appropriate, but the computer doesn't stop. Caffeine doesn't allow this: it ...
3
votes
3answers
2k views

Sandy Bridge Power Regression

Ubuntu 11.10 drives my Sandy-Bridge laptop fan crazy, just 1 week before official release! I thought it was a beta issue when testing daily builds on a regular basis, but I guess I was wrong... Is ...
3
votes
0answers
715 views

How do I stop my netbook from sleeping when I pull the power? [closed]

When I'm using my computer and unplug it, I would rather not have it go into sleep mode which it currently does. How do I fix that? A concrete example of this is the last time where I was actively ...
1
vote
1answer
915 views

Ubuntu 11.10 powers down automatically [closed]

Ubuntu 11.10 automatically powers down after a period of non-use. For example, I can't leave my computer on over night when I am downloading large files because it shuts down. Is this a bug or is ...
2
votes
2answers
3k views

What's the best way to optimize power management? [closed]

I decided to give Ubuntu a chance on my laptop (actually, it's a netbook). This netbook is capable of 7 hours battery life on Windows 7 and I only get around 3 hours with Ubuntu. I'm a newbie, but I ...
2
votes
1answer
769 views

How does Jupiter work

Jupiter is a powersaving applet, which can switch between maximum power, high power and save power. Definitely it does more than just setting the CPU speed, as the recommendations of powertop change ...
0
votes
1answer
632 views

Why does my laptop get too hot when the AC power is plugged in?

im using natty and when my computer is on AC power it gets very hot (no independent graphic card). But when im with only battery, the machine itself is quite cool. I've just tried sometime on the ...
2
votes
1answer
3k views

Monitors won't sleep (power management) if synergy or synergyc? is running

Similar question to Monitor won't enter power save mode , however I only experience the problem under synergy. Screensaver settings work, but the monitors never go to sleep. When synergy is not ...
2
votes
2answers
2k views

Why does my laptop think my battery is dead?

I've got about a 3 or 4 hour battery life on my laptop. I've had Ubuntu 11.04 on it for a week or so now, and yesterday, it started telling my I had a critically low battery (.3%), and suspends. When ...
8
votes
5answers
15k views

How to permanently disable monitor power saver using the command line?

I have tried as following: 1. Turn off: export DISPLAY=:0.0 && xset dpms force off 2. Turn on: export DISPLAY=:0.0 && xset -dpms Which works but that is a temporary solution, which ...
12
votes
9answers
26k views

How can I hibernate from GNOME Shell?

GNOME Shell doesn't have an option to hibernate in the session menu. I checked the GNOME Shell Cheat Sheet but hibernate is not mentioned there. How can I hibernate my machine from within a GNOME ...
2
votes
2answers
3k views

Unable to suspend - power manager vanished

Recently, after a few upgrades, I find that the power-management applet indicator has vanished, and the option of Suspend has suddenly changed to Power-off. I can still suspend through sudo pm-suspend,...
2
votes
0answers
874 views

How to enable the hibernate option? [closed]

I am not getting Hibernate option in ubuntu 10.04. Can anyone say what the problem might be and how to resolve it? (btw I tried this https://help.ubuntu.com/community/SwapFaq but it didn't work for ...
3
votes
3answers
413 views

Maximal power-saving on a laptop when sleep/hibernate is not possible? [duplicate]

I use a very portable laptop with Ubuntu running. On that laptop, neither sleep nor hibernate works reliably (it works sometimes and it doesn't the other times). I'm not asking how one can get them ...
1
vote
1answer
83 views

Failure of Power Supply during Remote Desktop Connection makes the local Machine unusable?

With sudden failure of power supply in the remote machine makes the local machine desktop to a complete dead state, meaning I'm not able to kill the current remote desktop connection that was ...
2
votes
1answer
1k views

What is Kworker and SignalSender

What is Kworker and SignalSender and why its utilizing more CPU. The stats from Powertop gave these numbers. How can I optimize it. Top causes for wakeups: 28.4% (420.4) PS/2 keyboard/mouse/...
2
votes
1answer
204 views

How do I enable S3 state?

I'd like to save my computer state in RAM and not on the HDD. How can I obtain this in 11.04?
0
votes
1answer
536 views

Will Samsung laptops be fully (OOTB) supported by Ubuntu?

Power management like: suspend, hibernate, open/close LID, optimal ("healthy") disc activity, internal modem, backlight control, FN keys etc. Will it be fully supported by Ubuntu out of the box? So ...
1
vote
1answer
4k views

Is there a way to stop the display from turning off?

I'm using the latest version of Ubuntu 11.10, and although I've disabled the lock screen options and checked the power settings, my display turns off after around ten minutes. That wouldn't be so bad, ...
4
votes
3answers
690 views

ACPI 30k+ interrupts per second

My computer is currently doing something like 30k+ interrupts per second. This causes battery issues as well as the CPU being always stuck at the highest speed, making it very hot (overheating.. 75C ...
3
votes
2answers
11k views

How can I actually change my “Power Management” settings?

I go into settings -> Power Management, trying to change the "Put display to sleep when inactive for:" and "Dim display when idle" settings. The changed settings are saved -- if I come back to the ...
6
votes
3answers
2k views

how can I run my script automatically on ac switching

So, I wan't to run it when start work on AC and this or better other script when start work from battery I tried /etc/acpi/power.sh adding symlink to /etc/laptop-mode/battery-start It seems to ...
7
votes
2answers
804 views

How can I increase time of working from my battery?

Usually I am not even able to watch film from start to end. I use Acer Aspire 5930 OS is Ubuntu 11.04 I use Classic Ubuntu desktop (AFAIK it really means GNOME2) I know, that: I can decrease ...
4
votes
3answers
898 views

will using xubuntu decrease my power usage?

I am battling with the absurd power usage of ubuntu 11.04. On windows 7 (which came preinstalled) I can get around 4:30 hours turning everything off (wifi, bluetooth, lowest brightness for screen) ...
2
votes
1answer
524 views

How do I determine the power state of my monitor?

How do I determine the state of my Monitor in Ubuntu 11.04. I've seen a lot of stuff regarding dpms, but for what ever reason, I don't have the dpms module running on my ubuntu install and I'd really ...
6
votes
1answer
2k views

How do I enable power management on Ubuntu Server?

I have Ubuntu Server 11.04 installed on an old noisy laptop. Its only purpose is to run subversion and I commit code quite rarely, but the laptop should work all the time. So I would like to know how ...
2
votes
1answer
2k views

Access and control of UPS

How is UPS monitoring started? I have Network UPS Tools (NUT) core system loaded on ubuntu 11.04 (client), but can find no application to run from the system menus. The software center description ...
4
votes
1answer
1k views

In terms of battery usage, which distro is more efficient between Lubuntu and Xubuntu?

Installing both on the same laptop without doing nothing more than the normal install, which one consumes less battery power at the end and makes the laptop last a little bit longer than the other, ...
1
vote
4answers
1k views

How to save power on a Xubuntu server?

I installed Xubuntu 11.04 AMD64 on an 'old' PC I have lying around. I quite like how Xfce has come along, but alas, this box will become headless shortly. Specs: Gigabyte P35-DS3P Intel E8200 @ 2....
0
votes
1answer
1k views

Screen goes into power saving mode on boot up

I have an annoying problem in that when I turn my computer on my monitor (an LG Flatron) immediately goes into power saving mode and I can see nothing but a black screen, apart from occasional flashes ...
7
votes
1answer
1k views

Linux kernel regression on power usage

Webupd8 reported this power management fix for the 2.6.38 Linux kernel regression: Add the following to the boot grub line "pcie_aspm=force" My question - how does this suggested fix differ from ...
7
votes
0answers
3k views

How to make powertop “Device Power Management” suggestion permanent? [duplicate]

When I run powertop on my laptop I get following suggestion: Suggestion: Enable Device Power Management by pressing the P key Doing this results in considerable saving in power usage and I would ...
0
votes
1answer
139 views

Does Unity on UNR provide power savings over the traditional UI?

I have recently installed UNB on my Atom-based netbook ( side-by-side with the default Windows 7 Starter ), and I'm very disappointed with the default interface. I really like the design, it looks ...
11
votes
2answers
6k views

How can I get the percentage of my battery life from the command line?

This question tells me how I can find the state of my battery from the command line. While this is useful information sometimes I need something quicker, basically like the percentage or enough for ...
1
vote
4answers
2k views

Thinkpad T410 abnormal power consumption and brightness keys behaviour

I've recently installed 11.04 on a fresh Lenovo ThinkPad T410 with a 9-cell battery, but it totally drains up from full battery after about 2:30 - 3:00 hours of normal use (mainly web surfing). The ...
15
votes
6answers
102k views

How do I disable my system from going to sleep?

I am getting a web server setup at home on an older AMD 2400+ desktop. I have Ubuntu 11.04 installed and running however, after a time, I can no longer browse to the server. When I go to the keyboard ...