<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ><HEAD ><TITLE >Why switch?</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="ACPI: Advanced Configuration and Power Interface" HREF="index.html"><LINK REL="PREVIOUS" TITLE="About ACPI" HREF="aboutacpi.html"><LINK REL="NEXT" TITLE="DSDT: Differentiated System Description Table" HREF="dsdt.html"></HEAD ><BODY CLASS="sect1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >ACPI: Advanced Configuration and Power Interface</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="aboutacpi.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="dsdt.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="sect1" ><H1 CLASS="sect1" ><A NAME="apmtoacpi" ></A >5. Why switch?</H1 ><P >Not all systems support both APM and ACPI. I switched because my system only supported ACPI. Pretty easy decision really. If you're switching to get <A HREF="http://acpi.sourceforge.net/documentation/sleep.html" TARGET="_top" >S3</A > (suspend to RAM) support and you're using a 2.4.x kernel, don't bother. It is <A HREF="http://lists.debian.org/debian-laptop/2003/debian-laptop-200304/msg00418.html" TARGET="_top" >not supported</A >. Period.</P ><P >Not sure if your system is supported? ACPI4Linux has a list of <A HREF="http://acpi.sourceforge.net/wiki/index.php/InstallationReports" TARGET="_top" >supported machines/BIOSes</A > started on their Wiki. Please contribute to the list if you've installed ACPI! They also have a list of machines that are <A HREF="http://acpi.sourceforge.net/documentation/blacklist.html" TARGET="_top" >not supported</A >.</P ><P >For more information about the power management in laptops you may (also) find the <A HREF="http://www.tldp.org/HOWTO/mini/Battery-Powered/index.html" TARGET="_top" >Battery Powered Linux Mini-HOWTO</A > useful.</P ></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" ><A HREF="aboutacpi.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="dsdt.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >About ACPI</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" > </TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >DSDT: Differentiated System Description Table</TD ></TR ></TABLE ></DIV ></BODY ></HTML >