The power-management tag has no wiki summary.
1
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1answer
383 views
How to power off USB stick or MMC card under linux?
Usually I just unmount the usb stick or mmc before unplugging it but I'd prefer to turn the power off before doing so. I think Windows does this, so the hardware should allow for turning off the power ...
1
vote
1answer
447 views
Can Bumblee really help with Optimus Laptops?
I bought Lenovo Z570 which comes with nVidia GEForce GT520M (Optimus technology) and recently I installed Ubuntu 11.10. Surprisingly, whenever I boot my system CPU fan rotates at very high speed and ...
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0answers
284 views
Cannot control brightness with Fedora 14 on Compaq CQ42
I've done the primary searching of similar questions, Found some, tried the solutions and they didn't work for me. So asking again.
All the keys of my Fn combination works except the brightness ones. ...
3
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2answers
266 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 ...
4
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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?
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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 ...
2
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1answer
462 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 ...
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3answers
3k views
Battery monitor for LXDE in Arch Linux
I have Arch Linux plus LXDE installed in my laptop. I want to know the status of the battery level. I tried to install batterymon, but got too many errors that I couldn't decipher.
Is there any ...
2
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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 ...
5
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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?
4
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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 ...
1
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1answer
928 views
No gnome-power-manager command but it is installed on arch
I'm running latest Arch, have gnome and fluxbox and my main windows manager is Fluxbox. I wanted to manage my power settings in fluxbox and i added gnome-power-manager in startup but is says there ...
2
votes
1answer
946 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 ...
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?
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0answers
361 views
Disabling lid-closure sleep while on battery in Debian Squeeze
How do you disable lid-closure sleep at the GDM screen (not logged in) on Squeeze?
4
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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
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2answers
639 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 ...
8
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1answer
346 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 ...
3
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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 ...
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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 ...
2
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2answers
328 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 ...
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0answers
374 views
Hardware Clock Management Framework in Linux Kernel [closed]
I asked this question on Stackoverflow http://stackoverflow.com/questions/6552637/hardware-clock-signals-implementation-in-linux-kernel. Maybe this is a more apt forum.
I am looking at some ...
2
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1answer
336 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 ...
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 ...
4
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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
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 ...
7
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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 ...
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 ...
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
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
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
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 ...
2
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0answers
555 views
power management of USB-enclosed hard drives [closed]
With a typical USB hard drive enclosure, is the full range of drive power management functionality available?
edit: moved this into a separate question:
In what may be an unrelated matter: is it ...
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
...
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 ...
9
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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 ...
3
votes
0answers
544 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 ...
