The power-management tag has no wiki summary.
9
votes
2answers
385 views
Screen doesn't always shut off on its own
It seems like when I have certain web pages focused, my screensaver will kick in, but the screen won't turn itself off. Does anyone have any ideas why this might be? Is there a way to disable whatever ...
8
votes
3answers
3k views
Screen turns on automatically (xset dpms force off)
I am using xset dpms force off to manually turn my screen off to save power.
However, it turns back on after some time (20 - 40 seconds).
Distro: Ubuntu-Lucid
Graphics: Intel 4500 MHD
...
8
votes
2answers
334 views
System-wide power management policy on debian-based distros?
I would like to put idle machines in our lab (running Mint Debian edition) on standby after a timeout. I have tried pm-suspend and it puts the machines on standby and wakes up fine.
Does anybody know ...
8
votes
1answer
347 views
Screen brightness reverts to max after returning from `xset dpms` display suspend
I'm running the openbox window manager and using this line in my autostart.sh to control display power management:
xset dpms 0 60 0
This works nicely, causing the display to suspend after 60 ...
7
votes
4answers
4k views
How to find power draw in watts?
I've been asked to estimate the power consumption of the servers I run for my laboratory. I thought and I'd ask if there was some handy linux commandline to get the power consumption of the server. It ...
7
votes
1answer
211 views
Power saving enables touchpad
I've installed power saving packages (bumblebee, laptop-mode-tools, and cpufreq) to my laptop with Debian Wheezy. Thanks to that I decrease power usage from 32W to 10W. But now I faced the issue that ...
6
votes
6answers
5k views
How can I improve battery life in Fedora 15?
I am seeing a horrible battery life with Fedora 15 (lovelock) with Gnome Shell 3 on my laptop. I keep the screen brightness, back light pretty low. I still get about 1 hr 50 minutes battery life out ...
6
votes
1answer
500 views
Linux kernel 3.3 power regression
I am using Fedora 16 in my DELL n4110. I recently upgraded the kernel from 3.2 to 3.3. In contradiction to the official claim, my system still drains battery as hell. It only provides 1:30 to 2 hrs of ...
5
votes
3answers
1k views
Will switching from Gnome to LXDE improve battery life?
I currently have Fedora 14 and the battery life is not so good. I am planning to switch to Fedora 16. Will I get significantly more battery life if I go for the LXDE spin instead of GNOME?
5
votes
1answer
249 views
Is it possible to automatically wake from suspend?
Here's my problem:
I have a laptop running Arch that I just keep on at home. It's got a good 4 hour battery life, but sometimes my daughter is playing near where it's kept and ends out pulling the ...
5
votes
3answers
276 views
Power management hook for running *X11* scripts on wake
Earlier I asked a similar question, but that one was about running system-level scripts.
I have a script that runs a series of xinput commands in order to enable two-finger scrolling on my touchpad. ...
4
votes
2answers
131 views
Return value of current watt consumption on command line
Is there a way to return the current watt consumption on the command line? I have found about the powertop program, but have not seen a way to return the Watt consumption as a value to the command ...
4
votes
2answers
71 views
Do I need acpid in a virtual machine?
I'm always wondering if power management facilities in a virtual machine is necessary?
i.e acpid.
And I'm not sure if they still function in a virtual machine.
4
votes
2answers
262 views
How can I find out the estimated power use of my desktop computer?
Is there a way to get the computer power usage instead of battery load tracking (what for instance seemingly powertop does), which is obviously not too useful on desktops?
4
votes
2answers
641 views
How to prevent my screens from dimming (going black) from the command line
In KDE, there was a system setting where you could specifically set the monitors to never go black.
Now I've switched to dwm and (it might not be related) my screens dim after about 10 minutes. How ...
4
votes
3answers
3k views
Disable USB power for USB controlled power strip
I have a USB controlled power strip that has a single usb port.
If my computer is turned on and connected via usb to the power strip, the power strip will provide electricity to all the sockets. I ...
4
votes
1answer
223 views
How to turn off screen under Linux/BSD?
How can I turn off my laptops screen from software side? ex.: under Scientific-linux, OpenBSD? Or the best I can do from OS side is just to show a black picture? Are there any solutions?
4
votes
2answers
409 views
How do I prevent GNOME suspending while I finish a compilation job
I am trying to build a custom kernel for my machine which is taking a long time to build (as expected). Is it possible to stop my GNOME desktop from suspending the machine until the compilation has ...
4
votes
2answers
1k views
Slow down the CPU
I tried to slow down my CPU with powernowd and cpufreq-selector. I hoped that with lower frequency it will be less hot and I won't hear my fan every time I will run internet radio.
I used the ...
4
votes
1answer
81 views
How to Reset/Cycle Power to a PCIe Device?
I have a PCIe device that only works correctly when the computer is fully powered off then on again. Issuing a simple reboot or reboot -p command does not appear to cycle the power to the PCIe card, ...
4
votes
2answers
3k views
Ubuntu Server Continuously “goes to sleep”
I am running a web server at home using Ubuntu 11.4 (maybe? I can't 100% recall) on an older AMD 2400+ desktop with 1 or 2 GB of RAM. Sorry I can't recall the details 100%.
Anyway, I have a KVM ...
4
votes
2answers
615 views
Power management hook for running scripts on wake
I'm looking for a way to run an arbitrary script every time my laptop wakes up.
4
votes
1answer
206 views
pm-utils: No network in suspend scripts?
I'd like to put a script in /etc/pm/suspend.d/ that needs network access (for a very short time) before allowing the system to suspend. However, even with scripts named "001_something" in ...
4
votes
2answers
272 views
Powertop strange results
I have installed Ubuntu 11.04 and battery life decreased by 2 times. Powertop documentation says that there should be 3 wakeups per second, I have 800-900. I think it's very strange because I didn't ...
4
votes
2answers
640 views
Preventing battery from charging
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 ...
4
votes
2answers
3k views
How to avoid powering down certain USB devices when a machine is suspended
I'd like to maintain power supply to a USB-powered drive when the system goes into suspend (AKA S3 or "suspend-to-RAM") mode.
Normally the power is cut while the machine is suspended, which causes it ...
3
votes
2answers
267 views
How to identify if there is some power saving setting that powered down a processor in Linux
I have a linux server that apparently has two Intel Xeon X5670.
/proc/cpuinfo shows 12 CPUs but dmidecode shows only one CPU and the other one is in the Unpopulated status like it is showing that ...
3
votes
4answers
444 views
How to disable energy saving on notebook screen when using Scientific Linux 6.3?
So there is a notebook that has Scientific Linux 6.3 installed with GNOME 2.
If we don't press any button on the keyboard or move the mouse, the screen of it turns black.
But: if we move the ...
3
votes
2answers
332 views
How do I make Powertop's suggestion's permanent?
When I run Powertop, and look at the Tunables screen, about twenty things are listed as Bad. I can toggle these to Good by pressing enter, and when I do so, projected battery lifetime doubles.
How ...
3
votes
3answers
394 views
How can I set power button (on computer case) to power off system with `systemd`?
How can I set the power button (on my computer case, not keyboard) to power off the system with systemd (without acpid)?
3
votes
1answer
122 views
Adding efficient storage to a laptop-based system
I've recently asked an as-yet-unanswered related question.
My question here is a bit different: I want to know the best way to add storage to a laptop-based system without sacrificing power ...
3
votes
1answer
629 views
Why does drive not enter standby mode when using hdparm -S
When reading the hdparm manual pages, it says that the -S value
is used by the drive to determine how long to wait (with no disk
activity) before turning off the spindle motor to save power
...
3
votes
1answer
2k views
How to adjust charging thresholds of laptop battery?
My laptop is Lenovo T400, and OS is Ubuntu 12.04.
I have not been able to adjust the thresholds for battery starting charging and stopping charging. I observed that its current starting charging ...
3
votes
1answer
1k views
How to properly prepare a server for power outages?
I have a personal Debian server set up, that I'm able to access in person and remotely, but normally I'm away from it and it's remote. It's on a battery-backup surge protector, but sometimes that ...
3
votes
1answer
238 views
How to stop waking all attached drives on reboot / deactivating swap?
A fresh install of Debian 6.0.6 for a system has 13 SATA drives attached. 12 refurbished WD-10EARS drives are yet unpartitioned. 1 WD1500BLFS drive is configured for OS and swap. Swap partition is ...
3
votes
1answer
3k views
Powertop tunables, what does it do?
I just install Powertop 1.98 on my laptop (T420 + FC15).
There is a section called "Tunables". Half of my devices shows as Bad. I see can toggle from Bad to Good? What this section is for? Why ...
3
votes
0answers
47 views
Exynos 5 DVFS or turning off cores in Ubuntu - Scaling frequency for one of the cores only (dual core) (cpufreq)
I was wondering if there is possible to scale only one of the cpu cores in the A15 in Exynos 5 ? I have tried using e.g cpufreq-set -c 1 -f 500MHz, but both cores are set to the same frequency. When ...
3
votes
0answers
490 views
Can't control brightness on HP Pav dv6t running Fedora 16
I installed FC 16 on my HP Pavilion dv6 with a 9-cell battery. I get approximately 7-8 hours on Windows 7, but at best 3 hours on Fedora. I cannot adjust the screen brightness using the fn keys, nor ...
3
votes
0answers
545 views
DPMS does not work: the monitor is not switched off [closed]
I have a monitor which was properly switched off by my Debian PC when
unused. I attached it to another machine and, this times, it is never
switched off.
In /etc/X11/xorg.conf, I have:
Section ...
2
votes
1answer
513 views
Screen fading out on GNOME, without ability to cancel
Sometimes, on my Arch Linux laptop, using GNOME for the desktop, my screen will fade out after a while of non-activity (even if I'm watching a video). This fade out is very slow, and can't be ...
2
votes
1answer
119 views
Measuring the current or the power
Is there a way to measure the electric current or power of the whole computer or its components using software? Voltage can be measured, and I am wondering why not with the current/power.
2
votes
2answers
309 views
How can I get an alert when my battery is about to die in Linux Mint?
This happens to me more than I'd like to admit, but sometimes I don't notice the power getting low since it only shows up in my status bar, then the computer just quits. I'd like a big alert that ...
2
votes
1answer
340 views
How to make the display go to sleep when screen is locked?
I’m using a Debian amd64 install with the default GNOME desktop. I’m aware that you can go into System | Preferences | Power Management, and choose to make the display go to sleep after a certain ...
2
votes
1answer
16 views
Querying display power status on Linux (Xorg) on command line
Is there a way to query the power status of an Xorg/X11 display from command line? I want to know if my laptop LCD is powered on after the screen saver--apparently the backlight is still on. This is ...
2
votes
1answer
357 views
Preventing ChromeOS from blanking the screen when working on a different tty
I am running Archlinux in a chroot alongside Chrome OS on a chromebook. The original project is there, my fork of it is here (mostly similar).
The issue is that the display power management of Chrome ...
2
votes
1answer
463 views
FreeBSD CPU frequency scaling on AMD Sempron 2100
I have FreeBSD 9.0-RC3 installed on an HP Thin Client that has a Mobile AMD Sempron(tm) Processor 2100+. I am trying to get cpufreq and powerd to manage the frequency of the processor, but I'm not ...
2
votes
1answer
1k views
Setting CPU frequency guidelines
I'm changing my CPU frequency because of noisy fan.
I used sudo cpufreq-selector -g powersave for this purpose, but I replaced my Linux system Xubuntu with Lubuntu because it utilizes better ...
2
votes
1answer
949 views
Power off USB storage device/port to avoid power consumption
A connected USB storage device, even if unused (unmounted, etc.), consumes power.
How can I turn it off / turn its power off so that it doesn't consume power as if it was disconnected, but without ...
2
votes
2answers
329 views
Check if display is powered on in Linux
Is there a way to check if a display is powered on in Linux? I tried xrandr and xset but neither of these two gives me any information about monitor power. Using xrandr I can identify if the vga cable ...
2
votes
1answer
1k views
Ubuntu 10.10 notification system area , many icons disappeared like network manager
When I restarted the computer I found no network icon. I tried to access internet but no connection was found. I also didn't have the Bluetooth, sound, battery, and power icon. Its really crazy that I ...
