Probably more important is the backlight dimming. Each can be configured seperately. If unsure, have a look at the list of supported processors in the Troubleshooting section to verify your’s is supported. Using hdparm for disk standby. Retrieved 12 June Starting this script will put wlan0 in Power Management mode, going to sleep at the latest three seconds after no traffic.
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Tue Dec 02, Last not least we have Suspend-to-Disk, a fork of swsusp. Thus it’s quite important not only to shut the display off when not needed, but also to reduce it’s backlight if possible. Having laptop-mode-tools installed on the system genroo not automatically enable the power management features that may be needed.
You’ll soon see how to use it. It doesn’t, unlike cpufrequtils, run as cppufreq daemon. The following installed packages are masked: Setting it to small values might wear out your drive and lose warranty.
OTOH, Ventoo never felt the need for it, in-kernel frequency control works just fine. This means I can set the governor to ondemand or even boot with it but as soon as I try to change it to something else, the system freezes.
Gentoo Forums :: View topic – [SOLVED] CPU frequency scaling on Pentium M (Dothan)
Alternative CPU speed monitoring. If not, apm offers all that is needed. Here is a basic modification supporting runlevel switching:. Introduction Why Power Management? For details on installation, configuration and usage see the separate PowerTOP article.
Using cpudyn for disk standby. It’s time gebtoo test whether CPU frequency changing works. Try to claim your warranty. When it is run, it sorts the running processes in order of how often they cause the processor to wake up.
Gentoo Linux Documentation — Power Management Guide
The first thing to do is to patch the kernel with the patches provided at http: Starting this script will put wlan0 in Power Management mode, going to sleep at the latest three seconds after no traffic. If you have no idea about it, first try speedfreq:. This page contains changes which are not marked for translation. But before we dive into the installation of cpufreqdlet gwntoo first look at the USE flags it supports.
See man hdparm for the options. Your new runlevel battery contains everything like defaultbut there is no automatic switch between both yet. Ottre Tux’s lil’ helper Joined: Put them in Power Management mode in analogy to the pm.
To make sure settings do not collide, it is not allowed to have overlapping settings. It may cause confusion like switching between two frequencies all the time. When switching between AC or battery, or no laptop mode, the appropriate governor as well as its minimum and maximum frequency is selected.
Power Management Guide
Please do not apply anything from this guide to a server unless you really know what you are doing. Typical ACPI events are closing the lid, changing the power source or pressing the sleep button. If you are getting error messages, please refer to the Troubleshooting chapter in the end of this guide.
Within this document, the primary focus will be on laptop mode tools since it offers a complete set of functionalities. An easy way to do so is monitoring the CPU speed while working with your laptop:. Let’s bring the hard disk to sleep as early as possible whenever it is not needed.