Some batteries sold as “new” are in fact old ones. There are different kernel sources in Portage sys-kernel. Intel P-State driver , [ https: Pay attention to the size parameter and modify it for your system. I just tried replacing the Pentium with the Celeron the laptop came with and this time it even refused to load the cpufreq driver! At last I got swsusp2 and suspend to RAM to work, but be warned:

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It is not masked here. This allows the software to poll the Linux kernel Power Supply interface, getting more detailed information on battery charge.

Gentoo Forums :: View topic – [SOLVED] CPU frequency scaling on Pentium M (Dothan)

Intel P-State driver[ https: This page contains changes which are not marked for translation. At last I gentol swsusp2 and suspend to RAM to work, but be warned: Display posts from previous: Sun Feb 25, 9: Disabling cups in battery mode. Be sure to read the documentation in laptop-mode. Tue Dec 02, It doesn’t, unlike cpufrequtils, run as a daemon.

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Just two common places: Not every laptop supports frequency scaling. Copyright Gentoo Foundation, Inc. It supports setting the CPU frequency governor, minimum frequency and maximum frequency. Setting it to small values might wear out your drive and lose warranty.

Copyright Gentoo Foundation, Inc. If you don’t see any change there, this doesn’t neccessarily mean the CPU frequency wasn’t changed.

The cpufreqd application monitors the status of the system through several plugins. It may cause confusion like switching between two frequencies all the time.

The following table gives a quick overview to help you decide on one of them. OTOH, I never felt the need for it, in-kernel frequency control works just fine. Update and it will be masked with a message about being removed next month.

To get comfortable with the interface to the kernel, first do some manual speed modifications. Although some of the information in this guide can be applied to power management for servers, it is not the intention of this document to go that route.

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Power Management Guide

The cpufreqd application can offer a more granular approach on CPU frequency scaling. This makes sure it doesn’t interfere with your policies. Alternative CPU speed monitoring. The following three chapters focus on devices that typically consume most energy – processor, display and hard drive. Tue Dec 02, 2: PowerTOP is a utility designed to measure, explain and minimize a computer’s gejtoo power consumption.

Power management/Guide – Gentoo Wiki

Power Management is the key to extend battery run time on mobile systems like laptops. Sat Dec 13, 7: Why would it need to receive updates as long as it remains working? Fri Dec 12,