185 lines
3.1 KiB
HTML
185 lines
3.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Power Management Unit - PMU (PowerBook)</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Linux on the Road"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Hardware in Detail: CPU, Display, Keyboard, Sound and More"
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HREF="mobile-guide-p2c1-hardware-in-detail.html"><LINK
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REL="PREVIOUS"
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TITLE="ACPI"
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HREF="mobile-guide-p2c1s9-acpi.html"><LINK
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REL="NEXT"
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TITLE="Batteries"
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HREF="mobile-guide-p2c1s11-batteries.html"></HEAD
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><BODY
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CLASS="sect1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux on the Road: </TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="mobile-guide-p2c1s9-acpi.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 12. Hardware in Detail: CPU, Display, Keyboard, Sound and More</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="mobile-guide-p2c1s11-batteries.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="sect1"
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><H1
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CLASS="sect1"
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><A
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NAME="mobile-guide-p2c1s10-pmu"
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></A
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>12.20. Power Management Unit - PMU (PowerBook)</H1
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><P
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> PowerBooks don't support the <SPAN
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CLASS="acronym"
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>APM</SPAN
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> specification, but
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they have a separate protocol for their PMU (Power Management Unit).
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There is a free (GPL) daemon called <B
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CLASS="command"
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>pmud</B
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> that handles
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power management; it can monitor the battery level, put the machine to
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sleep, and set different levels of power consumption. It was written by
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Stephan Leemburg.
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There is
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also an older utility called <B
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CLASS="command"
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>snooze</B
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> available from
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the same sites that just puts the PowerBook to sleep.
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<A
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HREF="http://pbbuttons.berlios.de/"
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TARGET="_top"
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>PBButtons</A
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>
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now includes the functionality of <B
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CLASS="command"
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>pmud</B
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>.
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</P
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><P
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> Cron works fine on my laptop as I never shut it off completely. I only
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put it to sleep. When it wakes up, the unexecuted
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<B
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CLASS="command"
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>cron</B
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> jobs from the sleep period all run.
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</P
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><P
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> This part is a courtesy of Steven G. Johnson.
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</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="mobile-guide-p2c1s9-acpi.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="mobile-guide-p2c1s11-batteries.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>ACPI</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="mobile-guide-p2c1-hardware-in-detail.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Batteries</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |