Pilas, baterias y energía

8/10/2019 Pilas, baterias y energa

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Administracin de energa en

Linux

LTV


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The pc use to heat a lot


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Why

Because it uses electricity

The electrons flowing over the conductors

surface creates hot.

All electronic devices do it.

More use requiere more power then it produces

a lot of heat.


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What can I do?

Use an "abaco"

Use the minimum possible

Use nothing

Use a special cooling system


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What about Linux?

At the linux distros are a lot of options for cooling.

Even you could keep your system cooler than a

system that uses windows.


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The old Jupiter

As you may know, Jupiter is a powerful and

lightweight power and hardware control applet. It

has been retired and last supported release is

up to Ubuntu 12.10 Quantal. However, Jupiter isavailable for Ubuntu 13.04 from JoliCloud

Desktop Environment PPA.


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Installing Jupiter

Run below command to add the PPA repository:

sudo add-apt-repository ppa:jolicloud-team/ppa

Then update package lists and install:

sudo apt-get update;

sudo apt-get install jupiter

To install Jupiter support package for Eee PCs:

sudo apt-get install jupiter-support-eee


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The new option TLP

Is an advanced power management command

line tool for Linux that tries to apply these

settings / tweaks for you automatically,

depending on your Linux distribution andhardware.


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TLP applies the following settings

depending on the power source

battery / ac Kernel laptop mode and dirty buffer timeouts; Processor frequency scaling including "turbo boost" / "turbo core";

Power aware process scheduler for multi-core/hyper-threading;

Hard disk advanced power management level and spin down timeout (per

disk);

SATA aggressive link power management (ALPM);

PCI Express active state power management (PCIe ASPM) Linux 2.6.35

and above;

Runtime power management for PCI(e) bus devices Linux 2.6.35 and

above;

Radeon KMS power management Linux 2.6.35 and above, not fglrx;

Wifi power saving mode depending on kernel/driver;

Power off optical drive in drive bay (on battery).


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Additional TLP functions:

I/O scheduler (per disk);

USB autosuspend with blacklist;

Audio power saving mode hda_intel, ac97;

Enable or disable integrated wifi, bluetooth or wwan devices upon

system startup and shutdown; Restore radio device state on system startup (from previous

shutdown);

Radio device wizard: switch radios upon network

connect/disconnect and dock/undock;

Disable Wake On LAN;

WWAN state is restored after suspend/hibernate;

Undervolting of Intel processors requires kernel with PHC-Patch;

Battery charge thresholds ThinkPads only;

Recalibrate battery

ThinkPads only.


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Install TLP in Ubuntu

Before proceeding with the installation, there are

a couple of things you need to do:

Firstly, if you've added any power saving

settings / scripts (e.g.: in /etc/rc.local), removethem or else TLP may not work properly;

Remove laptop-mode-tools ("sudo apt-get

remove laptop-mode-tools").


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sudo add-apt-repository ppa:linrunner/tlp

sudo apt-get update

sudo apt-get install tlp tlp-rdw

sudo tlp start.

sudo apt-get install smartmontools ethtool

smartmontools - needed to display disk drive

S.M.A.R.T. data ethtool - needed to disable wake on lan.


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Thermald

Linux Thermal Daemon (thermald) is a tool

developed by Intel's Open Source Technology

Center which monitors and controls the CPU

temperature, preventing it from overheating.


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Thermald tries to prevent the CPU from

overheating without a significant impact on

performance by using some specific Intel

functions available in the Linux Kernel.


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Thermald can control cooling using:

Active or passive cooling devices as presented in

sysfs

The Running Average Power Limit (RAPL) driver(Sandybridge upwards)

The Intel P-state CPU frequency driver

(Sandybridge upwards)The CPU freq driver the Intel PowerClamp

driver


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Thermald applies various cooling methods only

when the temperature reaches a certain

threshold, so you may not notice a difference

while using it if your laptop doesn't usually getvery hot.


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How to enable intel_pstate in Ubuntu 14.04

While it's not mandatory, thermald should work

better if Intel P-state is enabled. Intel P-state is

not enabled by default in Ubuntu 14.04, but you

can enable it easily.

You won't try to use with previous versions.


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Enabling intel_pstate

1. To enable intel_pstate in Ubuntu 14.04 (only

enable it if your laptop is using Sandy Bridge or

Ivy Bridge CPUs), edit the:

/etc/default/grub configuration file with a text

editor as root

gksu gedit /etc/default/grub


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And for

"GRUB_CMDLINE_LINUX_DEFAULT=" ... "

Add "intel_pstate=enable", like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet

splash intel_pstate=enable"


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Make sure you've changed the /etc/default/grub

file properly or else your system may fail to boot!

Once you're done,

Save the file and update Grub: sudo update-grub


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2. Restart your system and to check if intel_pstate

is enabled, run the following command:

cat

/sys/devices/system/cpu/cpu*/cpufreq/scaling_driver

The command above should return:

"intel_pstate".


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3. With intel_pstate, there are only two cpufreq

governors:

performance

powersave

there's no "ondemand", that is discontinued.

If is necesary you will install cpufreq applet.


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Laptop-mode-tools

Laptop Mode Tools

is a package that

should extend your

laptop's battery lifeby enabling the

Laptop Mode Linux

kernel feature along

with other power-related tweaks.


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Install Laptop Mode Tools 1.65

sudo add-apt-repository

ppa:webupd8team/unstable

sudo apt-get update

sudo apt-get install laptop-mode-tools

gksu /usr/sbin/lmt-config-gui

After any change you have made you will have

to restar the system to apply it.


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Xfce Lxde

Bumblebee

Ironhide

Etc

All of them have their

own packages forenergy admin, youshould chose yourbest option.


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