https://www.thinkwiki.org/w/index.php?title=Power_Management&feed=atom&action=historyPower Management - Revision history2024-03-29T10:41:59ZRevision history for this page on the wikiMediaWiki 1.31.12https://www.thinkwiki.org/w/index.php?title=Power_Management&diff=18879&oldid=prevWyrfel at 02:37, 24 January 20062006-01-24T02:37:50Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 02:37, 24 January 2006</td>
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<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The term Power Management is usually used as a referrer to the three basic functionalities enabling notebooks to save battery life when the user is not using it for some time: Screen Blanking ([[Standby mode]]), Suspend to RAM ([[<del class="diffchange diffchange-inline">Suspend </del>mode]]) and Suspend to Disk ([[Hibernation mode]]). But Power Management in fact covers much more, especially it also covers a lot of useful functionalities to save power while the user is working with the notebook when it's on battery. Most importantly these are Dynamic Frequency Scaling, also known as [[SpeedStep]], the Power Mangement functions of the builtin harddrive and display related Power Mangement.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The term Power Management is usually used as a referrer to the three basic functionalities enabling notebooks to save battery life when the user is not using it for some time: Screen Blanking ([[Standby mode]]), Suspend to RAM ([[<ins class="diffchange diffchange-inline">Sleep </ins>mode]]) and Suspend to Disk ([[Hibernation mode]]). But Power Management in fact covers much more, especially it also covers a lot of useful functionalities to save power while the user is working with the notebook when it's on battery. Most importantly these are Dynamic Frequency Scaling, also known as [[SpeedStep]], the Power Mangement functions of the builtin harddrive and display related Power Mangement.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>An ideally configured notebook would scale the processors (and also the graphics chips) frequency according to its use, spin down the harddrive if it's not needed anymore (and try to achieve such times a lot), shut down or suspend unused hardware components, maybe dim the LCD panel when on battery and of course put itself to sleep when the user doesn't do anything for a certain amount of time.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>An ideally configured notebook would scale the processors (and also the graphics chips) frequency according to its use, spin down the harddrive if it's not needed anymore (and try to achieve such times a lot), shut down or suspend unused hardware components, maybe dim the LCD panel when on battery and of course put itself to sleep when the user doesn't do anything for a certain amount of time.</div></td></tr>
</table>Wyrfelhttps://www.thinkwiki.org/w/index.php?title=Power_Management&diff=15861&oldid=prevMJK at 11:08, 25 August 20052005-08-25T11:08:06Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 11:08, 25 August 2005</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
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<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The term Power Management is usually used as a referrer to the three basic functionalities enabling notebooks to save battery life when the user is not using it for some time: Screen Blanking, Suspend to RAM (<del class="diffchange diffchange-inline">Sleep</del>) and Suspend to Disk (Hibernation). But Power Management in fact covers much more, especially it also covers a lot of useful functionalities to save power while the user is working with the notebook when it's on battery. Most importantly these are Dynamic Frequency Scaling, also known as [[SpeedStep]], the Power Mangement functions of the builtin harddrive and display related Power Mangement.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The term Power Management is usually used as a referrer to the three basic functionalities enabling notebooks to save battery life when the user is not using it for some time: Screen Blanking <ins class="diffchange diffchange-inline">([[Standby mode]])</ins>, Suspend to RAM (<ins class="diffchange diffchange-inline">[[Suspend mode]]</ins>) and Suspend to Disk (<ins class="diffchange diffchange-inline">[[</ins>Hibernation <ins class="diffchange diffchange-inline">mode]]</ins>). But Power Management in fact covers much more, especially it also covers a lot of useful functionalities to save power while the user is working with the notebook when it's on battery. Most importantly these are Dynamic Frequency Scaling, also known as [[SpeedStep]], the Power Mangement functions of the builtin harddrive and display related Power Mangement.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>An ideally configured notebook would scale the processors (and also the graphics chips) frequency according to its use, spin down the harddrive if it's not needed anymore (and try to achieve such times a lot), shut down or suspend unused hardware components, maybe dim the LCD panel when on battery and of course put itself to sleep when the user doesn't do anything for a certain amount of time.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>An ideally configured notebook would scale the processors (and also the graphics chips) frequency according to its use, spin down the harddrive if it's not needed anymore (and try to achieve such times a lot), shut down or suspend unused hardware components, maybe dim the LCD panel when on battery and of course put itself to sleep when the user doesn't do anything for a certain amount of time.</div></td></tr>
</table>MJKhttps://www.thinkwiki.org/w/index.php?title=Power_Management&diff=8414&oldid=prev84.191.172.212 at 01:28, 6 August 20052005-08-06T01:28:57Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 01:28, 6 August 2005</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
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<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The term Power Management is usually used as a referrer to the three basic functionalities enabling notebooks to save battery life when the user is not using it for some time: Screen Blanking, Suspend to RAM (Sleep) and Suspend to Disk (Hibernation). But Power Management in fact covers much more, especially it also covers a lot of useful functionalities to save power while the user is working with the notebook when it's on battery. Most importantly these are Dynamic Frequency Scaling, also known as <del class="diffchange diffchange-inline">Speedstep</del>, the Power Mangement functions of the builtin harddrive and display related Power Mangement.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The term Power Management is usually used as a referrer to the three basic functionalities enabling notebooks to save battery life when the user is not using it for some time: Screen Blanking, Suspend to RAM (Sleep) and Suspend to Disk (Hibernation). But Power Management in fact covers much more, especially it also covers a lot of useful functionalities to save power while the user is working with the notebook when it's on battery. Most importantly these are Dynamic Frequency Scaling, also known as <ins class="diffchange diffchange-inline">[[SpeedStep]]</ins>, the Power Mangement functions of the builtin harddrive and display related Power Mangement.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>An ideally configured notebook would scale the processors (and also the graphics chips) frequency according to its use, spin down the harddrive if it's not needed anymore (and try to achieve such times a lot), shut down or suspend unused hardware components, maybe dim the LCD panel when on battery and of course put itself to sleep when the user doesn't do anything for a certain amount of time.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>An ideally configured notebook would scale the processors (and also the graphics chips) frequency according to its use, spin down the harddrive if it's not needed anymore (and try to achieve such times a lot), shut down or suspend unused hardware components, maybe dim the LCD panel when on battery and of course put itself to sleep when the user doesn't do anything for a certain amount of time.</div></td></tr>
</table>84.191.172.212https://www.thinkwiki.org/w/index.php?title=Power_Management&diff=7297&oldid=prevWyrfel at 02:19, 9 May 20052005-05-09T02:19:09Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 02:19, 9 May 2005</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To make Power Management work, it highly relies on a message exchange (or event notification) system between the hardware (the notebook) and the software (the running OS). The classic solution for this is the APM (Advanced Power Management) system which leaves the big part of control to the BIOS. But over time this solution turned out to lack flexibility and so ACPI was developed, which is now widely preferred in modern notebooks. With ACPI the BIOS is basically only taking care of sending hardware events (like button triggers) to the OS or recieving software events and making the hardware react on that. All else (like the actual saving of the OS' state on suspends or processor speed control) is left to the operating system itself, enabling a great amount of flexibility and configurability.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To make Power Management work, it highly relies on a message exchange (or event notification) system between the hardware (the notebook) and the software (the running OS). The classic solution for this is the APM (Advanced Power Management) system which leaves the big part of control to the BIOS. But over time this solution turned out to lack flexibility and so ACPI was developed, which is now widely preferred in modern notebooks. With ACPI the BIOS is basically only taking care of sending hardware events (like button triggers) to the OS or recieving software events and making the hardware react on that. All else (like the actual saving of the OS' state on suspends or processor speed control) is left to the operating system itself, enabling a great amount of flexibility and configurability.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
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</table>Wyrfelhttps://www.thinkwiki.org/w/index.php?title=Power_Management&diff=3065&oldid=prevWyrfel: page created2004-12-12T02:49:04Z<p>page created</p>
<p><b>New page</b></p><div>The term Power Management is usually used as a referrer to the three basic functionalities enabling notebooks to save battery life when the user is not using it for some time: Screen Blanking, Suspend to RAM (Sleep) and Suspend to Disk (Hibernation). But Power Management in fact covers much more, especially it also covers a lot of useful functionalities to save power while the user is working with the notebook when it's on battery. Most importantly these are Dynamic Frequency Scaling, also known as Speedstep, the Power Mangement functions of the builtin harddrive and display related Power Mangement.<br />
<br />
An ideally configured notebook would scale the processors (and also the graphics chips) frequency according to its use, spin down the harddrive if it's not needed anymore (and try to achieve such times a lot), shut down or suspend unused hardware components, maybe dim the LCD panel when on battery and of course put itself to sleep when the user doesn't do anything for a certain amount of time.<br />
<br />
To make Power Management work, it highly relies on a message exchange (or event notification) system between the hardware (the notebook) and the software (the running OS). The classic solution for this is the APM (Advanced Power Management) system which leaves the big part of control to the BIOS. But over time this solution turned out to lack flexibility and so ACPI was developed, which is now widely preferred in modern notebooks. With ACPI the BIOS is basically only taking care of sending hardware events (like button triggers) to the OS or recieving software events and making the hardware react on that. All else (like the actual saving of the OS' state on suspends or processor speed control) is left to the operating system itself, enabling a great amount of flexibility and configurability.</div>Wyrfel