<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ><HEAD ><TITLE >Power Management Unit - PMU (Apple PowerBook)</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Linux Ecology-HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Reduction of Power Consumption" HREF="ecology-howto-power-consumption.html"><LINK REL="PREVIOUS" TITLE="Advanced Power Management (APM/ACPI)" HREF="ecology-howto-power-management.html"><LINK REL="NEXT" TITLE="Turn Monitor off, use Keyboard LEDs" HREF="ecology-howto-monitor.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" >Linux Ecology-HOWTO</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="ecology-howto-power-management.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 1. Reduction of Power Consumption</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="ecology-howto-monitor.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="sect1" ><H1 CLASS="sect1" ><A NAME="ecology-howto-pmu" ></A >1.2. Power Management Unit - PMU (Apple PowerBook)</H1 ><P > PowerBooks don't support the APM specification, but they have a separate protocol for their PMU (Power Management Unit). There is a free (GPL) daemon called <B CLASS="command" >pmud</B > that handles power management; it can monitor the battery level, put the machine to sleep, and set different levels of power consumption. It was written by Stephan Leemburg <stephan at jvc.nl>, and is available from PPC distribution FTP sites. There is also an older utility called <B CLASS="command" >snooze</B > available from the same sites that just puts the PowerBook to sleep. </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="ecology-howto-power-management.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="ecology-howto-monitor.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Advanced Power Management (APM/ACPI)</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecology-howto-power-consumption.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Turn Monitor off, use Keyboard LEDs</TD ></TR ></TABLE ></DIV ></BODY ></HTML >