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

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11
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5answers
15k views

How to find power draw in watts? [duplicate]

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 ...
1
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0answers
80 views

Suspend options with KDM greeter

I am not able to suspend my desktop to RAM from the KDM greeter. I am able to suspend it to RAM when logged into KDE using the sleep option from the logout menu and by pressing the sleep key on my ...
1
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0answers
26 views

Is it safe to use the -y and -Y flags to hdparm?

Is it dangerous to use the -y or -Y flag in hdparm during a write, or when the disk is still mounted, or will hdparm refuse to spin-down, or automatically sync and unmount?
0
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0answers
491 views

Where are pm-powersave settings on OpenSUSE 13.2, and are they used?

I am trying to sort out powersaving for OpenSUSE 13.2 running on a laptop. I found this guide: https://en.opensuse.org/Powersaving for understanding Powersaving on OpenSUSE. However, it appears to ...
1
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0answers
35 views

how to identify process which blocks suspend/hibernate

I have an intermittent problem with a laptop that doesn't sleep/hibernate after lid is closed. And I have no idea why. I suspect that some process blocks sleeping/hibernating. How can I identify ...
0
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0answers
107 views

CPU load and power management (frequency)

question background In my understanding the load value (shown e.g. by top) allows (together with the knowledge how many CPU cores the system has) a very quick assessment which share of the ...
0
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0answers
103 views

How to measure power consumption of a USB device?

The title says it. It has been asked how much power a port can deliver, but I do not need that. I need to get the power consumption of a plugged-in device in real time. This question was left ...
6
votes
1answer
6k views

Turning off power to usb port. Or turn off power to entire usb subsystem

I have a usb lamp which I specifically bought in order to turn it off programmatically at a certain time, thus I need to remove the power to its usb port. I believe I have a usb-hub at usb6. The lamp ...
9
votes
1answer
329 views

How to prevent the Linux kernel from waking a secondary HDD from sleep

Is there a way to instruct the (Linux) kernel not to wake up a secondary hdd after a system sleep/wake-up cycle? I'm asking because in my laptop I have an SSD as a primary drive containing the system ...
0
votes
1answer
49 views

How do I immediately put a drive to sleep (without changing its power setting configuration)?

Within GNOME's "Disks" utility there is the option to immediately put a drive into sleep / standby, which spins down the platters. I would like to do this on my servers before pulling hot-swap drives ...
1
vote
1answer
1k views

CentOS 7 cpupower not setting the CPU's to maximum

On my machine, i have power savings disable on the BIOS. When I run Ubuntu on this machine, the CPU's are running maximum at 2100 MHz. However, when I'm running CentOS 7, even with the scaling ...
1
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0answers
226 views

indicator-cpufreq in arch linux

I'm an Ubuntu user testing out Arch Linux. So far I'm happy. On Ubuntu I used the indicator-cpufreq applet to control power profile both on Unity and Gnome-shell. On Arch, I cannot figure out how ...
0
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1answer
252 views

What is the suspend procedure in KDE?

I've been reading this question, and I'm wondering what is the procedure for suspending in KDE? Whether to RAM or to disk.. When I click suspend, or close the lid, what gets triggered? What is the ...
0
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0answers
58 views

Possible not restore cpu frequency after suspending and waking up?

When I suspend my Ubuntu 12.04 and wake it up, the cpu frequency I set by clicking indicator-cpufreq on the desktop panel will be restored. I wonder if that is a bug or some design? Is there a way to ...
1
vote
1answer
144 views

what does pm-suspend-hybrid do?

man says pm-suspend During suspend most devices are shutdown, and system state is saved in RAM. The system still requires power in this state. Most modern systems require 3 to 5 ...
1
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1answer
124 views

get system uptime on battery?

How to know system uptime under battery ? so that i can get exact time of battery backup the uptime shows complete uptime (AC/Battery) NOTE : I am using linux Mint 17.
0
votes
1answer
78 views

xscreensaver sometimes unlocks locked screen automatically, after returning from monitor standby mode

I am using xscreensaver to lock my screen. Additionally to that, my monitor goes to "standby" , i.e turn display off, after 30 minutes of inactivity. It has happened to me twice now, that I have ...
1
vote
1answer
270 views

Auto-hibernate with udev rule

I'm using Debian Jessie with systemd. In the past I've used an acpid script that let's my computer hibernate when the battery is 5% or below. In an attempt to make a replacement for that I've made ...
0
votes
1answer
216 views

Role of the Intel P state driver

I searched high and low for what “Intel P state” is and what it does. I found out that it has to do with performance and power consumption. I learned that if you build it in the kernel, it'll becomes ...
2
votes
1answer
225 views

Display power management in console

When in console (i.e. not in Gnome or KDE) the display will automatically power down in case of inactivity. It seems to me to be set to something around 30 minutes. This power management is completely ...
6
votes
2answers
5k views

Powertop tunables: what does it do?

I just installed Powertop 1.98 on my laptop (T420 + FC15). There is a section called "Tunables". Half of my devices show as Bad. I see I can toggle from Bad to Good? What this section is for? What ...
2
votes
1answer
247 views

Prevent Mint from suspending while playing music in Spotify

In Linux Mint 17 I have Suspend when inactive for under Power Management set to 10 minutes. The problem is that the system suspends even when I'm listening to music using Spotify. Is there any way ...
7
votes
2answers
5k views

How do I make Powertop's suggestions 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 ...
5
votes
2answers
276 views

Suspend to RAM not working

I get following error when I try to suspend my laptop: failed to check authorisation: GDBus.Error:org.freedesktop.DBus.Error.Service.Unknown: The name org.freedesktop.PolicyKit1 was not provided by ...
1
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1answer
39 views

Running applications depending on battery or charging

What are good program or script solutions to run specific applications depending on whether the laptop is running on battery or charging? In order to conserve battery, I automatically want to stop ...
0
votes
1answer
97 views

Powerbutton freezes applications

I've just installed Debian Jessie and I'm trying to get systemd to do basic power management. systemctl suspend and systemctl hibernate works well to suspend and hibernate the system. Now, I want ...
0
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0answers
35 views

Show power consumption (not on battery)

There are several tools for showing the power consumption when running on battery (PowerTOP is one of the better knowns). Is there also a way of showing the power consumption when not on battery (i.e. ...
1
vote
2answers
304 views

How to reduce disk access?

This is a follow-up question to How to reduce temperature on a Dell XPS (L502X)?. After reading the answer, I noticed that my harddrive is spinning constantly, even when running TLP in bat-mode ...
1
vote
1answer
956 views

xfce4-power-manager not updating; ACPI finding an unknown battery but working fine?

I recently upgraded my Asus S56CA Ultrabook and unfortunately my battery indicator in xfce4 stopped working. I am running Debian 8 (Jessie). uname -a gives me this: Linux 3.14-2-amd64 #1 SMP Debian ...
3
votes
0answers
80 views

Disable USB drive from sleeping

I am loading fedora20 directly from a SATA drive connected via USB. The problem is that I will be working and all of a sudden the drive seems to have been put to sleep and nothing will work except ...
13
votes
1answer
11k views

Setting CPU governor to on demand or conservative

I'm struggling with cpupower on ArchLinux. I want to set governor to ondemand or even to conservative. First if I do $ sudo cpupower frequency-info --governors, I only get performance powersave. So ...
1
vote
3answers
923 views

Why kernel 3.6.2 is so much less energy efficient than 3.6.1 on Mint 13?

I noticed, that the power consumption in my ASUS P53E notebook is doubled (from 10W to 20W) when I change from kernel 3.6.1 to 3.6.2 (or later). I use Ubuntu Quantal mainline kernel from ...
1
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0answers
126 views

How to get notification from upower when UPS is on battery

I have a Fedora Core 19 system powered via a desk-side UPS. I've connected the UPS' USP port to the FC19 system, and it was apparently recognized, as upower -d now reports its presence: ups ...
0
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0answers
7 views

automatic suspend does not work in Gnome [duplicate]

I have configured automatic suspend in Settings->Power, then one hour later nothing happen when the suspend time came. I checked the internet for some information and found there is a bug in Gnome ...
2
votes
0answers
72 views

Linux Wifi High Power Consumption

I'm running Fedora 20, kernel 3.15.6 and ath9 driver with an ateros card. My battery life is very short, on an older debian install I had around 3 to 4 hours, now I'm between 1 and 2 hours. Powertop ...
0
votes
0answers
56 views

Automatic sleep not working in Gnome

I have configured automatic suspend in Settings->Power, then one hour later nothing happen when the suspend time came. I checked the internet for some information and found there is a bug in Gnome ...
0
votes
1answer
961 views

How to reduce temperature on a Dell XPS (L502X)?

Problem My Laptop is running quite hot (sensors reports ~50-60°C) during normal usage. In my opinion this is too high to work comfortably over long periods. Especially the region where I rest my ...
4
votes
2answers
282 views

Determine status of laptop lid

I have a weird problem where my laptop will wake when it's closed, generating a lot of heat and causing much frustration. Is there a way that I can tell if the laptop's lid is closed so that I can ...
12
votes
5answers
7k 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
284 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
68 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
801 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
750 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
262 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
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0answers
170 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 ...
10
votes
4answers
1k 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
102 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 ...
5
votes
0answers
608 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
108 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
60 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 ...