Questions related to power management, particularly power saving measures.

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1
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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
203 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
680 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
802 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
896 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
514 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
99k 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 ...
22
votes
6answers
2k views

Forcibly underclocking at night

My desktop stays on all the time. It acts as a server and also performs other semi-essential household tasks. During the day it uses the OnDemand CPU setting. This essentially just scales the CPU ...
3
votes
1answer
254 views

Webcam light turns on, when I use media applications like Banshee and Rhythmbox [closed]

I have an Asus laptop. It is the X53 Model. I use Ubuntu 11.04 on it and I have no problems but when I try to open a multimedia program the LED of my webcam turns on. What can I do to about it?
2
votes
0answers
939 views

Lenovo Thinkpad R500 having problems resuming [closed]

Yesterday I installed Ubuntu 11.04 from scratch on my Thinkpad R500, leaving the default power management settings. Yesterday I closed the lid, and this morning when I opened it the laptop resumed ...
2
votes
1answer
1k views

Turning off power to Nvidia Graphics Card

I have an acer 5742G laptop with the Nvidia 540M graphics card. After I upgraded to 11.04 I have been experiencing serious battery and overheating issue. Up until 10.10 I was able to put this thing on ...
4
votes
1answer
1k views

Freeze when resuming from screensaver or monitor-sleep-state [closed]

I've installed Natty on an older Samsung desktop at work. It's a shared machine that needs no screen-locking, passwords, or anything else. (Perhaps it should have those features, but nobody would use ...
2
votes
1answer
1k views

External monitors don't go into standby if laptop lid is closed

I use a docking station with 2 external monitors and keep my laptop lid closed when docked. In Gnome's power settings, I have set "Do nothing" when laptop lid is closed and this works fine (after ...
6
votes
1answer
2k views

UPS Compatibility with Ubuntu Server

I'm looking into getting battery backup unit to protect my Ubuntu server. How can I find out if it is compatible with Ubuntu (11.04)? Ideally I'd like to be able to tell the server when there is a ...
7
votes
5answers
10k views

High Idle CPU temperature under Ubuntu, but not Windows

I have a Dell Inspiron Mini 1012 running Ubuntu 10.04 and Windows 7 Starter in a dual-boot configuration. The CPU runs much cooler in Windows than it does in Ubuntu, even when the CPU has been ...
6
votes
5answers
18k views

Power Management - Sleep / Wake up Server when accessed

I have a headless HP Proliant Microserver with ubuntu installed. This machine has samba shares on it serving media and I usually rdp or ssh into it. Now my issue is I want the machine to go into sleep ...
5
votes
1answer
475 views

Is there a bug report tracking the power regression in the 2.6.38 kernel?

I'm looking for an official bugtracker entry (either ubuntu, or kernel) which tracks the story of power usage regression described in: http://www.phoronix.com/scan.php?page=article&item=...
2
votes
3answers
2k views

Computer restarts instead of shutting down [closed]

My Ubuntu 11.04 will not shutdown when I tell it to; it will instead restart the computer.
0
votes
1answer
138 views

Window freezes when hulu is running and monitor shuts off [closed]

When I'm watching something on Hulu in full screen and my power management tells my monitor to shut off the window locks up and I can't exit the full screen mode. Pressing any keys or combination of ...
40
votes
9answers
99k views

How can I control HDD spin down time?

I have 2 HDDs in my PC. Ubuntu is turning off the secondary HDD very quickly after about 15 minutes, which is short for me. I need to control this time. How can I do it? I tried GNOME power ...
3
votes
2answers
1k views

Fans go in overdrive on my Inspiron 9400! What should I do?

After an update to 11.04 the fans of my Inspiron 9400 go in overdrive and never lower speed. Is this normal? It did not happen on any of the other Ubuntu releases.
0
votes
1answer
350 views

Monitor never goes to sleep [closed]

Am running Natty with Unity 2D
18
votes
0answers
10k views

Battery life decreased after upgrade to 11.04 [duplicate]

Possible Duplicate: Why does my computer get less battery life with Ubuntu compared to Windows? After upgrading from Ubuntu 10.10, my battery life has decreased dramatically. There was a bug ...
0
votes
1answer
1k views

“PM : Resume disk failed” error

I have noticed that this version 10.04, all installations that I do .... always shown this error: "PM: Resume disk failed" Mesage This is shown by the command: dmesg | grep-i failed (if i want to ...
3
votes
2answers
689 views

How do I check how much power my laptop is drawing?

How can I check how much power my laptop is pulling at any given time?
8
votes
2answers
7k views

Can APC ups wake powered off machine up when AC power is back?

I have used apcupsd under ubuntu to power off my machine when AC power is lost via serial. Is there any way let the UPS to wake up already powered off machine when AC power is back? I have tried to ...
1
vote
0answers
2k views

Can I disable monitor dimming/screen saver when playing videos? VLC/Web(HTML5/Flash/Silverlight/QuickTime) [duplicate]

Possible Duplicate: How do I stop the screensaver from turning on when I watching online videos? Is it possble to disable Monitor dimming/Screensaver only on video playback? For me, videos ...
3
votes
1answer
4k views

Modify manually PWM of my fan (fan speed)

I configured fanspeed but it detects only one "temp" captor... In Gnome Sensors applet, I can see the temperature of three captors... The one of my GPU is 75°, 62° for my hard disk and 32° for my ...
8
votes
0answers
3k views

Checking laptop's battery state in a terminal [duplicate]

Possible Duplicate: How to check battery status using terminal? I want to find out whether my laptop is plugged in to AC power or not using the command line. How can I do this?
1
vote
1answer
923 views

Dell Vostro 3400 reboots instead of shutting down

Well the title says it all. After the GUI button of shutdown responded to reboot. I have tried all the command there is but every time I shut down my laptop it reboots. I tried sudo halt sudo ...
2
votes
1answer
1k views

Why does my laptop give a loud beep everytime I unplug from AC power?

This used to happen only if I do it before Ubuntu was fully loaded or if it was just waking from a suspend, but now it started happening always. My laptop is Acer Aspire 5740. Can the OS suppress this ...
3
votes
1answer
2k views

Low-battery-power action without gnome-power-manager

I'm running the openbox WM and would like to avoid loading the gnome stack. One of the lingering issues I have to resolve is avoiding abrupt system crashes due to depleted battery power. Is there a ...
6
votes
3answers
923 views

laptop-mode-tools and harddrive spinoff

So I wanted to extend my laptop battery life. After googleing a lot I found many tips and tricks. Some even in this site as well. Then I found this package in synaptic as well laptop-mode-tools. Now I ...
5
votes
1answer
1k views

My Thinkpad X201 battery is draining extra fast. What can I do?

I got a new Thinkpad X201 last week with the 6 cell battery, which is advertised to work for 5 hours. I installed Ubuntu Maverick on this machine right away. My battery life is only around 2 hours. Is ...
1
vote
1answer
3k views

Can I modify power-management settings on a laptop running Ubuntu Server?

It's my first time running ubuntu server and I'm trying to figure out a way to prevent the machine from going into suspend mode (I'm guessing) when the Lid is closed on the Laptop. Is it possible to ...