<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ><HEAD ><TITLE >Battery Powered Linux Mini-HOWTO</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="NEXT" TITLE="Power Management" HREF="powermgm.html"></HEAD ><BODY CLASS="ARTICLE" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="ARTICLE" ><DIV CLASS="TITLEPAGE" ><H1 CLASS="TITLE" ><A NAME="AEN2" ></A >Battery Powered Linux Mini-HOWTO</H1 ><H3 CLASS="AUTHOR" ><A NAME="AEN4" >David Lechnyr</A ></H3 ><DIV CLASS="AFFILIATION" ><DIV CLASS="ADDRESS" ><P CLASS="ADDRESS" ><TT CLASS="EMAIL" ><<A HREF="mailto:david@lechnyr.com" >david@lechnyr.com</A >></TT ></P ></DIV ></DIV ><DIV CLASS="REVHISTORY" ><TABLE WIDTH="100%" BORDER="0" ><TR ><TH ALIGN="LEFT" VALIGN="TOP" COLSPAN="3" ><B >Revision History</B ></TH ></TR ><TR ><TD ALIGN="LEFT" >Revision 2.31</TD ><TD ALIGN="LEFT" >2003-07-30</TD ><TD ALIGN="LEFT" >Revised by: drl</TD ></TR ><TR ><TD ALIGN="LEFT" COLSPAN="3" >Minor updates</TD ></TR ><TR ><TD ALIGN="LEFT" >Revision 2.0</TD ><TD ALIGN="LEFT" >2002-10-08</TD ><TD ALIGN="LEFT" >Revised by: drl</TD ></TR ><TR ><TD ALIGN="LEFT" COLSPAN="3" >Major updates and conversion to SGML</TD ></TR ><TR ><TD ALIGN="LEFT" >Revision 1.0</TD ><TD ALIGN="LEFT" >1997-12-21</TD ><TD ALIGN="LEFT" >Revised by: hm</TD ></TR ><TR ><TD ALIGN="LEFT" COLSPAN="3" >Initial draft by Hanno Muller</TD ></TR ></TABLE ></DIV ><DIV ><DIV CLASS="ABSTRACT" ><A NAME="AEN26" ></A ><P ></P ><P >This document describes how to optimize and configure power management on a ready-configured Linux system for use on battery-powered laptops. This will be helpful for everyone who runs Linux on a portable computer system. APM/ACPI methods of power management are discussed along with power saving tips and techniques. There is also some discussion about the different types of batteries available.</P ><P ></P ></DIV ></DIV ><HR></DIV ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT >1. <A HREF="powermgm.html" >Power Management</A ></DT ><DD ><DL ><DT >1.1. <A HREF="powermgm.html#APM" >Advanced Power Management (APM)</A ></DT ><DT >1.2. <A HREF="powermgm.html#ACPI" >Advanced Configuration and Power Interface (ACPI)</A ></DT ><DT >1.3. <A HREF="powermgm.html#WHICHONE" >APM vs. ACPI: Which one?</A ></DT ><DT >1.4. <A HREF="powermgm.html#HYPERTHREAD" >SMP, Hyper-Threading, IA64 & NUMA</A ></DT ></DL ></DD ><DT >2. <A HREF="displaytypes.html" >DPMS</A ></DT ><DD ><DL ><DT >2.1. <A HREF="displaytypes.html#NORMAL" >Normal</A ></DT ><DT >2.2. <A HREF="displaytypes.html#STANDBY" >Standby</A ></DT ><DT >2.3. <A HREF="displaytypes.html#SUSPEND" >Suspend</A ></DT ><DT >2.4. <A HREF="displaytypes.html#OFF" >Off</A ></DT ></DL ></DD ><DT >3. <A HREF="methods.html" >Power Management Methods</A ></DT ><DD ><DL ><DT >3.1. <A HREF="methods.html#SWSUSP" >swsusp(8)</A ></DT ><DT >3.2. <A HREF="methods.html#HDPARM" >hdparm(8)</A ></DT ><DT >3.3. <A HREF="methods.html#SYSKLOGD" >sysklogd(8)</A ></DT ><DT >3.4. <A HREF="methods.html#XF86" >XFree86</A ></DT ><DT >3.5. <A HREF="methods.html#KDE" >KDE 3.1</A ></DT ><DT >3.6. <A HREF="methods.html#ENERGYSTAR" >Energy Star</A ></DT ><DT >3.7. <A HREF="methods.html#SWAP" >Swap File</A ></DT ><DT >3.8. <A HREF="methods.html#TMPFS" >tmpfs</A ></DT ><DT >3.9. <A HREF="methods.html#MISC" >Miscellaneous Tuning</A ></DT ><DT >3.10. <A HREF="methods.html#MYTH" >Power Saving Myths</A ></DT ></DL ></DD ><DT >4. <A HREF="battery.html" >Types of Batteries</A ></DT ><DD ><DL ><DT >4.1. <A HREF="battery.html#NICD" >Nickel Cadmium (Ni-Cd)</A ></DT ><DT >4.2. <A HREF="battery.html#NIMH" >Nickel Metal Hydride (Ni-MH)</A ></DT ><DT >4.3. <A HREF="battery.html#LIION" >Lithium Ion (Li-ion)</A ></DT ><DT >4.4. <A HREF="battery.html#SMART" >Smart Batteries</A ></DT ><DT >4.5. <A HREF="battery.html#BATCOMP" >General Battery Care</A ></DT ></DL ></DD ><DT >5. <A HREF="intro.html" >Appendix</A ></DT ></DL ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" > </TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" > </TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="powermgm.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" > </TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" > </TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Power Management</TD ></TR ></TABLE ></DIV ></BODY ></HTML >