198 lines
3.8 KiB
HTML
198 lines
3.8 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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>Miscellaneous Power Saving Techniques</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 Ecology-HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Reduction of Power Consumption"
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HREF="ecology-howto-power-consumption.html"><LINK
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REL="PREVIOUS"
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TITLE="Using Spare CPU Cycles"
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HREF="ecology-howto-cpu-cycles.html"><LINK
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REL="NEXT"
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TITLE="Alternative Power Supplies - Sun, Wind, Water"
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HREF="ecology-howto-power-supplies.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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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux Ecology-HOWTO</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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HREF="ecology-howto-cpu-cycles.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 1. Reduction of Power Consumption</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="ecology-howto-power-supplies.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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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="ecology-howto-power-savings-misc"
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></A
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>1.8. Miscellaneous Power Saving Techniques</H1
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><P
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> Linux halts the CPU in the idle cycle to further reduce power consumption. Early reports of OS/2, Win3.1/95, NT, and Linux showed Linux to use far less power than DOS-based O/S's that spun in the idle loop and consumed power -- this may have changed hence it would need research to validate.
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</P
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><P
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> Most Linux-users tend to leave their computer on for years whenever
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possible. However, several modern BIOS's support an unattended powerup, and
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with <B
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CLASS="command"
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>cron</B
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> you can even do an unattended
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<B
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CLASS="command"
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>shutdown</B
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>. No need to leave the computer on night after
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night. Other techniques to powerup your computer at certain times
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are: ACPI-Wakeup, NVRAM-wakeup and the <B
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CLASS="command"
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>settime</B
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> command.
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Computers can even be power up on request remotely by means of
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Wake-on-LAN using a network connection or Wake-on-Ring using an
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old fashioned serial interface and a modem.
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</P
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><P
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> Beware of animated web pages! Web pages containing Flash, Java,
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or just animated images can consume a lot of CPU.
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When you leave your computer and keep it on,
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make sure you close all browser pages with animations.
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Otherwise, your PC may be left running at full speed while you are not using it.
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</P
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><P
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> To disable animated images in Mozilla Firefox
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go to <A
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HREF="about:config"
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TARGET="_top"
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>about:config</A
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>,
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find <B
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CLASS="command"
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>image.animation_mode</B
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> and change its value
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to <B
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CLASS="command"
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>none</B
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> or <B
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CLASS="command"
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>once</B
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>.
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</P
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><P
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> Do not forget to switch off your DSL modem / wireless router / ISP box / printers
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at night or during vacations if you don't use them.
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These devices consume quite a lot (typically 15W).
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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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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="ecology-howto-cpu-cycles.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="ecology-howto-power-supplies.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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>Using Spare CPU Cycles</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="ecology-howto-power-consumption.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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>Alternative Power Supplies - Sun, Wind, Water</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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> |