Questions related to power management, particularly power saving measures.

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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: ...
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
97k 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
348 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 ...
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
921 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
920 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 ...
1
vote
1answer
698 views

Battery Indicator Error. D-Bus

So I installed the detailed Battery Indicator that was shown on OMGUbuntu, and it worked fine for a few days. Now, every time I login I get this: I tried to go back to the old indicator, but it ...
11
votes
3answers
354 views

Is running temperature considered when a machine is added to the 'Ubuntu certified' list?

I have a 2 yr old HP pavillion dv4 laptop. Ubuntu runs fine. But I recently noticed that the temperature of the cores (with just a browser open, not playing flash videos) is significantly higher than ...
1
vote
2answers
967 views

Power manager keeps shutting down the display

I'm probably missing something here. I'm using the default Ubuntu power manger, I set it up like this: On AC: no screen dimming when idle, never put computer to sleep, never put display to sleep. On ...
4
votes
4answers
923 views

Squeak after lid close [closed]

I have a strange problem with Ubuntu 10.10 - when I close the laptop lid (Samsung r580) it makes a very high squeak. This doesn't occur on Win7. I am currently using 2.6.35.27 kernel. If you need some ...
2
votes
3answers
2k views

Is there a power-management like OpenSuse?

In OpenSuse there is a applet for choosing different energy-profiles for your notebook. Are there any tools/applets that will enable those features for ubuntu?
2
votes
1answer
603 views

What exactly is --no-daemon function in Gnome-power-manager

I have problem with monitor flickering and here i found that possible solution is to run gnome-power-manager like this: gnome-power-manager --no-daemon For some people this fixed the issues. I am ...
2
votes
2answers
2k views

What happened to sched_mc_power_savings

My laptop's battery performance is awful. I can get about an hour and a half out of it, so I've been looking for some ways to boost the power efficiency of my laptop. I saw the tip to enable this: ...
4
votes
1answer
2k views

Unmounted disk still spins up regularly

I just added a disk, with partitions but none of them are mounted. The disk will still spin up every now and then. it goes like this: ### disk spins up hdparm -Y /dev/sdb;date /dev/sdb: issuing ...
2
votes
1answer
576 views

Are there tools to manage the power management for HDD?

I wonder if there are a better tool than the panel at System → Preferences → Power Management to manage the power consumption for the HDD. Specifically HDD in a laptop.
3
votes
1answer
4k views

How to enable the CONFIG_PM_ADVANCED_DEBUG kernel configuration option [duplicate]

Possible Duplicate: What is kernel configuration? I'm trying to save the battery power. For that i'm using powertop and one suggestion is "Enable the CONFIG_PM_ADVANCED_DEBUG kernel ...
7
votes
2answers
6k views

Which log will tell me why my computer shut down?

I was at school SSHing to my homebox. All of a sudden, my connection was closed. Attempting to reconnect failed. When I returned home, I discovered that my computer was off. Nobody was at my house ...
2
votes
1answer
517 views

How can I view power statistics on a desktop computer?

I can view power statistics on my laptop by clicking the battery icon in the indicator applet. How can I access this screen on a desktop computer?
2
votes
3answers
4k views

How to control display brightness on Intel hardware?

I'm working with a Sony Vaio BZ-12 Notebook and want to know how to manage the brightness of my display, especially when it's in eco-mode. The designated Graphic-Accelerator is the Intel GM45. With ...
3
votes
2answers
522 views

How exactly does gnome manage laptop suspend events?

The reason I ask is that, while suspend under lid closure and fn-F4 work perfectly in the Ubuntu (gnome) desktop, I cannot get them to work when using a different window manager (fvwm) on my thinkpad ...
10
votes
5answers
4k views

How can I keep a wireless card's radio powered off by default?

My desktop's PCI wireless card is always scanning for available wireless networks, but I only rarely use it. Can I keep the radio turned off until I need it?
4
votes
1answer
365 views

Why is kernel “rescheduling” causing so many wakes-from-idle?

PowerTOP reports that the majority of wakeups are being caused by [Rescheduling interrupts], [kernel scheduler], and [kernel core]. What are these, and can I do anything to reduce the number of ...
10
votes
4answers
2k views

Cutting desktop power usage

I'm on a general energy saving mission. I've finally swapped my old CRT monitor for a LCD, so the next step it to optimise the PC power usage. It's using an AMD 64 X2 4600+ CPU which I know can ...
7
votes
1answer
361 views

What Activities Stop Computer from Sleeping

I generally set up power hungry servers with a fairly short timeout before they're supposed to suspend or hibernate, but they seem to occasionally go to sleep during file transfers, ssh sessions, etc. ...
2
votes
2answers
3k views

Is There A Spiceworks Equivalent?

For some reason I vaguely recall there being an equivalent of Spiceworks for Ubuntu. I had it running on an old server that crashed and now I can't remember the name. Any thoughts?
15
votes
2answers
11k views

How to charge the battery till 60-80% only?

I just got my laptop's battery replaced and read a bit about how to prolong it's life. Most people say that the best choice is not to charge it will 100%, but rather to 60-80%. My battery is quite ...
92
votes
4answers
260k views

How to control fan speed?

How can I control the computer's fan speed? On Windows there is a wonderful program called SpeedFan.
6
votes
1answer
602 views

Laptop resumes from suspend while lid is closed [closed]

I have a Dell Studio 15 and I am running Ubuntu 10.10. When I close my lid or select the suspend option, the machine suspends as indicated by the slowly pulsing power indicator. I'll put the machine ...
1
vote
1answer
5k views

How to turn off power management for external hard drive (Seagate GoFlex)?

I bought this 2tb Segate GoFlex this last Black Friday and since then every 15 minutes or so the drive spins down, and then a little while later completely dismounts. Very annoying. From what I ...
6
votes
2answers
574 views

Is it safe to configure “Shutdown” on “When laptop lid is closed”?

To setup a laptop owned by a complete PC novice any settings that may become hard to tackle remotely need to be avoided. The laptop will be administrated via SSH. One thing in my list are problems ...
6
votes
2answers
2k views

How to prevent battery from charging while on UPS

I'm running on UPS power and would like to prevent the laptop's battery from charging, to increase the amount of power available to other devices. Is there a way to do this? update The machine is a ...
6
votes
4answers
7k views

Monitor won't enter power save mode

My LCD monitor won't enter power save mode. I've gone into System → Preferences → Screensaver, clicked Power Management, then set Put display to sleep when inactive for: to 10 minutes (for both On AC ...
1
vote
1answer
1k views

Monitor turning off instead of activating the screensaver, how do I prevent it?

I have a screensaver configured to activate after 5 minutes. When the time elapses, instead of activating the screensaver, my monitor turns off. I tried playing with settings, and searching the ...
2
votes
1answer
797 views

How to close lid without triggering standby one time only

Related: How can I tell Ubuntu to do nothing when I close my laptop lid? I have my laptop set to activate standby when I close the lid. I want to keep this as the default for both battery and AC ...
5
votes
3answers
564 views

How can I adjust the time that automatically reduces the brightness of screen?

At the moment it uses just a few seconds of inactivity after that ubuntu reduces the brightness of my screen. Where do i find the option to increase this value?
2
votes
2answers
567 views

Hard Disk Spins Down as long as Battery is in Laptop [closed]

I just figured out today that as long as the battery is in my laptop, it doesn't matter if it's fully charged while plugged in, Ubuntu always spins down my hard drive. I noticed this because there was ...