Systems to manage power consumption, such as system suspension and hibernation, CPU speed adjustment, disk spindown, battery usage monitoring, …

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11
votes
5answers
6k 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 ...
0
votes
1answer
99 views

How to give more power to a USB device (error -110)?

I’m trying to mount an external hard drive (2.5", USB, no separate power supply) on Debian 7, but it gives me (in dmesg as well as when trying to boot with the device connected) errors like: ...
3
votes
1answer
34 views

How can I ignore KDE's power-saving features for certain programs?

I want to use KDE Power Saving capabilities on my Desktop computer, such as suspend and screen-off. But, I want these capabilities be enabled only when some programs aren't running; for instance, I ...
2
votes
2answers
648 views

How to increase the timer before drive spins-down?

I use Ubuntu 12 beta on a Lenovo Z575. I noticed that the disk spins down a few seconds after the last operation. When I am working, e.g. in the vim and write quite often, it spins-up and -down ...
6
votes
3answers
297 views

Which command to force a drive to spin up?

I've looked through the manual for hdparm, sdparm. I know there are arguments to spin down the drive, with -y and -Y. I also know there are arguments to control the power saving features, such as -S ...
0
votes
1answer
152 views

Hard disk drive spins up on laptop sleep/wake, can I stop it doing this?

I have in my Arch Linux-running laptop an SSD and an HDD; the latter I use seldom. It is mounted as /mnt/sdb5 and configured to spin down proactively when on battery (/etc/default/tlp, ...
1
vote
0answers
65 views

Nouveau power management with Nvidia Tesla graphics

I have a MacBook Pro 13" Mid 2010 with a Nvidia GeForce 320M (NV50 family (Tesla) according to this list). I installed Linux on this machine and wanted to use Nouveau as the video driver. Everything ...
1
vote
1answer
758 views

Debian Wheezy rebooting instead of powering off

I'm having a weird issue with my Debian Wheezy desktop. When I try to shutdown the system (either from Gnome or from the command line with shutdown -h now) the computer automatically reboots. The ...
10
votes
4answers
721 views

NetworkManager: disabled network when sending system to sleep

When I suspend my notebook, NetworkManager disables the wireless network (in nm-manager.c:do_sleep_wake). However, I'd love to still use the network for a very short time (to unmount cifs mounts, ...
2
votes
0answers
59 views

High varying discharge rate

I got an Asus N76VB notebook. On Windows I can easily stay on battery for 3-4 hours in powersave mode, but on Linux (first Ubuntu 14.04, currently Fedora 20) the battery's discharge rate varies from ...
4
votes
0answers
356 views

Monitor connected via displayport to DVI adapter won't sleep properly

I have a monitor connected to my machine that displays odd behavior when entering power saving sleep mode. When entering sleep, the monitor will alternate between blanking and displaying a default ...
1
vote
1answer
68 views

Disabling power management

I am running Cubieez on a Cubieboard2, I need to disable screen saver and power management, I've followed several tutorials about but none seems to work, I've written: xset s off. xset -dpms xset s ...
1
vote
2answers
51 views

Why does it temporarily look like the pv command transfer limit is no longer enforced when I come out of suspend to ram?

I have this perl script and I discovered the pv command and decided to use it to get some feedback into what is going on with the randomness in terms of throughput. After a few tests1 I decided to ...
2
votes
0answers
53 views

How do I find out what process is putting my machine to sleep?

My laptop is going to sleep after about 10 minutes of inactivity, and I don't know why. I verified the standard power options, are they're not set to put my machine to sleep. Here is grep's output ...
2
votes
1answer
26 views

Low brightness in a Intel Mobile GM956/GL960

I'm installing Debian stable (7.0) on a old Dell Vostro 1500 and I noticed that the brightness is always low. I've searched around and the only thing I've found is adding nomodeset ...
4
votes
3answers
272 views

How to find reason a notebook wakes up?

I'm having a problem with my notebook suspending, but then waking up when I don't want it to (either immediately, or much later when in the bag - I may have two issues to solve here). But for the ...
2
votes
1answer
2k views

How to change Power button shutdown action

I use Mageia ver 4 Linux as server, without X started and without any user login-in during normal operation. This PC has a special card for measuring and control of other devices. This card has its ...
1
vote
0answers
815 views

CentOS 6.5 will not sleep after period of inactivity

I've recently upgraded my Ubuntu 12.04 LTS to CentOS 6.5. This is a desktop PC (non-server) that I would like to sleep/power down after a period of inactivity. I have the following settings in my ...
0
votes
1answer
2k views

No hibernate option in power manager on Mint 16 MATE

In my fresh install of Linux Mint 16 with MATE, I have no hibernate option in the Power Manager; only suspend and shutdown. In the Quit menu I have hibernate as an option. Also sudo pm-hibernate ...
1
vote
1answer
184 views

TLP overrides auto-suspend configuration

On my ThinkPad x201, I've been having problems where the computer will shutdown once it has been suspended to RAM, so I disabled the auto-suspend when the lid is closed by editing ...
1
vote
1answer
82 views

Will a running program be killed if I suspend my OS?

I am running a program. If I suspend my OS (Ubuntu 12.04) in the middle, will the process of the running program be killed? If not, when I wake up my OS, how can I resume the process? Thanks!
5
votes
1answer
87 views

Writing a suspend-aware program in linux

Programs that depend on physical time, such as jackd and its clients, do not play well with software suspend of a laptop in linux. I would like to fix a client that starts issuing plenty of "timing ...
2
votes
3answers
9k views
4
votes
1answer
151 views

What program displays volume/screen brightness under KDE?

It seems there's some bug in KDE related to power management and after putting my netbook to sleep several times, plugging it in and out, the notification about screen brightness set to 100% doesn't ...
1
vote
0answers
44 views

Laptop doesn´t go to sleep if HDD is in standby

So I have one mSata-SSD where my whole System is installed and one HDD where I put my Videos and Music! I don´t need my HDD all the Time so I put it to sleep on Startup sudo hdparm -Y /dev/sda The ...
4
votes
1answer
108 views

Reporting cpu hogs

Once in a while some program (ok, usually it's firefox) will start eating up nearly 100% of a processor's cpu time, heating up the processor and driving down by laptop's battery life. Since it's not ...
3
votes
4answers
2k 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 ...
2
votes
1answer
87 views

What is the worst scenario, if the hard disk or motherboard don't support the `hddparm -s`?

I have a desktop PC, that dubs as a RAID-6 server. When I don't need the RAID-related stuff, I'd like to spin off all the hard drives involved in RAID (I hate the noise). Unfortunately, even if ...
2
votes
2answers
383 views

What does the package UPower output if on a desktop

On Ubuntu 12.04, if I use the command: upower -i /org/freedesktop/UPower/devices/battery_BAT0 It will output all of the statistics for the battery. However, what does it output if I am using a ...
1
vote
0answers
171 views

How do I stop charging the battery way prior to 100% in OpenBSD?

I'm thinking about using a netbook as an OpenBSD server. I'd like it to have UPS -- so the integrated battery is quite useful. However, I'm very familiar with the batteries going dead very quickly ...
5
votes
1answer
2k views

“Memory corruption detected in low memory” kernel messages?

I have some memory corruption detected in low memory messages. I have read about it here, but I'm afraid I can't really make anything out of the discussion. It does indeed happen when I ...
2
votes
1answer
428 views

Shutdown my (backup) hard disk on Linux when I don't use it

I have a hard disk in my computer that I use to make backups of my data. I do not use this disk otherwise. How can I stop this disk from spinning once my backup is finished? Also how would I make it ...
1
vote
1answer
257 views

openSuSE power management from command line

I'm using openSuSE 13.1 as a text-only server on an old netbook. A couple days ago, I was able to set it so that it didn't suspend or power down when the lid closed. I had to reinstall the OS today, ...
2
votes
0answers
276 views

Battery issues on a Lenovo Ideapad Z460 running Ubuntu 13.10

I've been using Ubuntu 13.10 on my Lenovo for more than 5 months without a problem. Yesterday I disconnected the AC adapter to take the laptop with me to the couch and it simply shut down. So I ...
12
votes
1answer
1k views

How do I make my laptop sleep when it reaches some low battery threshold?

I'm using Ubuntu, but I have i3 as my window manager. Under i3, when my battery reaches 0%, the computer will just abruptly shut down, no warning or anything. Is there a simple script or ...
4
votes
1answer
1k views

command to reboot as non-root user

I am using LXDE on Debian. When logged in LXDE as user, I can click on the logout icon in the menu and choose one of the options: shutdown reboot logout suspend But when I type reboot or shutdown ...
5
votes
2answers
892 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 ...
2
votes
0answers
126 views

listen a power-button event in Python (no ACPI)

I am using a Debian machine which does not include the acpid package. Is there a way that I can reboot the machine using Python language when the power-button is pressed, without installing that (or ...
2
votes
5answers
6k views

Ubuntu 12.10 Fan overspeeding

I have installed Ubuntu 12.10 leaving Win 7 licensed version. But again as usual I need to fix so many issues. This time fan is generating lots of noise. It looks it is running at max speed. My ...
1
vote
0answers
64 views

Two “Audio codecs” have 100% power usage in PowerTOP - what does this mean?

Should I be worried? My battery power doesn't last long (~1hr), could this be the reason? How can I fix this (if it has to be fixed at all)?
0
votes
2answers
163 views

Hard disk power management with image toggling in display

We have a system in which we almost toggle some display data in the screen 24 hours x 7 days a week. Since our application runs every day, we see some hard disk failures in the field. Unfortunately, ...
3
votes
1answer
332 views

Turn system on by USB keyboard?

To hibernate my Debian Wheezy system, I run the following command: sudo sh -c 'echo disk > /sys/power/state' To wake up the system, I can press any key on my USB keyboard. My understanding of ...
4
votes
1answer
481 views

Suspending laptop fails ~50% of the time

Running ArchLinux and GNOME 3 on a Thinkpad X220. When I suspend my laptop it goes into sleep mode and the LED ring around the power button fades in and out. When a suspend fails, the LED ring and ...
12
votes
4answers
2k views

OS X: how to keep the computer from sleeping during a ssh session

When I ssh into a OS X computer on my network the session lasts until the OS X goes into sleep mode. Is there a way to prevent this from happening during my SSH session, apart from physically bumping ...
2
votes
2answers
83 views

OS X: how to keep the computer from sleeping during a http connection

An application I use downloads data from a specific server, and I need it to sleep after the download has finished and the socket is closed. However downloads take place at random days, the app that ...
2
votes
0answers
38 views

Find out if system startup was initiated by rtc alarm

How can I know if a system startup was initiated by an rtc alarm event in linux? I am writing some scripts that handle sleeping/shutdown of my htpc. I want the machine to sleep after recording has ...
3
votes
1answer
817 views

Closing lid on Crunchbang

I'm running Crunchbang on a laptop. I can't seem to find an option to toggle if the laptop goes to sleep when the lid closes. There are certain times where I want to put the laptop away or close it ...
0
votes
2answers
100 views

embedded linux and powering usb stick

I have a problem where I need to read a usb-stick or a usb keyboard: When I plug in the USB stick or keyboard I can't get power to the device. dmesg says nothing I tried: for device in $(ls ...
2
votes
0answers
846 views

MacBook Pro Retina: huge power consumption

I'm currently running Debian/Jessie on a MacBook Pro Retina 10,1 15" (early-2103). Everything is going well (ethernet, WiFi, retina, etc.) but I worry about its power consumption. laptop-mode manages ...
5
votes
1answer
5k 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 ...