Power Management

This page has information about Power Management for Linux. Power Management exists because many products are handheld or mobile, and consumers are interested in using their products for as long as possible on a single battery charge.

Power Management Technology/Project pages

 * http://www.lesswatts.org/index.php - LessWatts.org
 * LessWatts.org is about how you can save real watts, however you use Linux on your computer or computers.
 * LessWatts is about creating a community around saving power on Linux, bringing developers, users, and sysadmins together to share software, optimizations, and tips and tricks.

CELF Standards
See here

Documents

 * Mapping of ACPI states to omap power states:

For some good overviews of different PM features relevant to embedded, you may want to look at the following papers:

Every Microamp is Sacred - A Dynamic Voltage and Current Control Interface for the Linux Kernel - Liam Girdwood http://www.celinux.org/elc08_presentations/regulator-api-celf.pdf

Power Management Quality of Service and How You Could Use it in Your Embedded Application - Mark Gross http://www.celinux.org/elc08_presentations/elc2008_pm_qos_slides.pdf

Building Blocks for Embedded Power Management - Kevin Hilman http://www.celinux.org/elc08_presentations/PM_Building_Blocks1.pdf

Linux Suspend-to-Disk Objectives for Consumer Electronic Devices - Vitaly Wool http://tree.celinuxforum.org/CelfPubWiki/ELCEurope2007Presentations?action=AttachFile&do=view&target=std.pdf

Linux Clock Management Framework - Siarhei Yermalayeu http://tree.celinuxforum.org/CelfPubWiki/ELCEurope2007Presentations?action=AttachFile&do=view&target=ELC_2007_Linux_clock_fmw.pdf

Open Source Projects/Mailing Lists

 * linux-pm mailing list (and list archives).
 * Dynamic Power at sourceforge.