ACC SHELL
<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 9. Controlling Your Desktop’s Power Management</title><link rel="stylesheet" href="susebooks.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="Documentation"><link rel="up" href="part.kde.manage.html" title="Part II. Managing Files and Resources"><link rel="prev" href="cha.kde.kwallet.html" title="Chapter 8. Managing Passwords with KWallet Manager"><link rel="next" href="bk03apa.html" title="Appendix A. GNU Licenses"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header" border="0" class="bctable"><tr><td width="80%"><div class="breadcrumbs"><p><a href="index.html"> Documentation</a><span class="breadcrumbs-sep"> > </span><a href="book.kdeuser.html">KDE User Guide</a><span class="breadcrumbs-sep"> > </span><a href="part.kde.manage.html">Managing Files and Resources</a><span class="breadcrumbs-sep"> > </span><strong><a accesskey="p" title="Chapter 8. Managing Passwords with KWallet Manager" href="cha.kde.kwallet.html"><span>◀</span></a> </strong></p></div></td></tr></table></div><div class="chapter" title="Chapter 9. Controlling Your Desktop’s Power Management"><div class="titlepage"><div><div><h2 class="title"><a name="cha.kde.kpowersave"></a>Chapter 9. Controlling Your Desktop’s Power Management<span class="permalink"><a alt="Permalink" title="Copy Permalink" href="#cha.kde.kpowersave">¶</a></span></h2></div></div></div><div class="toc"><p><b>Contents</b></p><dl><dt><span class="sect1"><a href="cha.kde.kpowersave.html#sec.kpowersave.widget">9.1. Using the Battery Monitor Widget</a></span></dt><dt><span class="sect1"><a href="cha.kde.kpowersave.html#sec.kpowersave.profiles">9.2. Saving Power by Using Profiles</a></span></dt><dt><span class="sect1"><a href="cha.kde.kpowersave.html#sec.kpowersave.configure">9.3. Configuring Power Management</a></span></dt></dl></div><a class="indexterm" name="id393230"></a><p>
In KDE 4, you can control power management functions supported by your
system with just a few clicks on the desktop. You can choose between
various power management profiles to match the tasks your system is
facing. The <span class="guimenu">Personal Settings</span> hold a <span class="guimenu">Power
Management</span> category, allowing you to configure detailed settings
as described in <a class="xref" href="cha.kde.kpowersave.html#sec.kpowersave.configure" title="9.3. Configuring Power Management">Section 9.3, “Configuring Power Management”</a>.
</p><p>
Apart from power profiles that can be applied while you are interacting
with your computer, there are also power saving functions (suspend modes)
you can use instead of shutting down the computer completely during
breaks.
</p><div class="sect1" title="9.1. Using the Battery Monitor Widget"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sec.kpowersave.widget"></a>9.1. Using the Battery Monitor Widget<span class="permalink"><a alt="Permalink" title="Copy Permalink" href="#sec.kpowersave.widget">¶</a></span></h2></div></div></div><p>
If you are using mobile computers like a laptop, a widget in your panel
displays the battery status and gives you access to power management
functions. If the <span class="guimenu">Battery Monitor</span> widget is not
displayed in your panel by default, add it manually. For more
information, refer to <a class="xref" href="cha.kde.cust.html#proc.kde.cust.desk.add.widgets" title="Procedure 3.2. Adding Widgets to the Desktop">Procedure 3.2, “Adding Widgets to the Desktop”</a>.
</p><p>
The widget allows you control the screen brightness when your system is
running on battery power, to switch to a different power profile, or to
trigger your system to enter a suspend mode. Click the panel icon to open
the widget.
</p><div class="figure"><a name="id381911"></a><p class="title"><b>Figure 9.1. Battery Monitor Widget</b></p><div class="figure-contents"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" cellspacing="0" cellpadding="0" width="55%"><tr><td><img src="images/kde_battery_monitor.png" width="100%" alt="Battery Monitor Widget"></td></tr></table></div></div></div><br class="figure-break"><p>
Which suspend modes and power profiles are available depends on the power
management abilities of your system and the profiles defined in the
<span class="guimenu">Personal Settings</span>.
</p><p>
The following suspend modes are widely available:
</p><div class="variablelist"><dl><dt><span class="term"><span class="guimenu">Sleep (Suspend to RAM)</span>
</span></dt><dd><p>
Pauses your computer without logging you out. All your data and the
session data is saved to RAM. Bringing the system up again is faster
than restoring a session from disk.
</p></dd><dt><span class="term"><span class="guimenu">Hibernate (Suspend to Disk)</span>
</span></dt><dd><p>
Pauses your computer without logging you out. All your data and the
session data is saved to disk before the system is laid to rest. It is
thus protected against data loss should you lose power in the
meantime. Waking the system up again is much faster than with a fresh
boot.
</p></dd></dl></div><p>
To manually suspend your computer, use the buttons in the widget or the
suspend options on logging out (see
<a class="xref" href="cha.kde.start.html#sec.kde.start.leave" title="1.3. Leaving Your System">Section 1.3, “Leaving Your System”</a>). If supported by the system and
configured accordingly, pressing sleep buttons on your machine or
keyboard will also suspend your machine.
</p><p>
You can configure your system to automatically switch to suspend mode
after certain events like closing the lid (if you are using a laptop) or
after a period of that time that the system has been idle. Refer to
<a class="xref" href="cha.kde.kpowersave.html#sec.kpowersave.configure" title="9.3. Configuring Power Management">Section 9.3, “Configuring Power Management”</a> for more information.
</p></div><div class="sect1" title="9.2. Saving Power by Using Profiles"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sec.kpowersave.profiles"></a>9.2. Saving Power by Using Profiles<span class="permalink"><a alt="Permalink" title="Copy Permalink" href="#sec.kpowersave.profiles">¶</a></span></h2></div></div></div><p>
Power management profiles let you adjust various power management
parameters to the requirements of certain typical situations you are
facing when using your machine. openSUSE® ships with a set of four
preconfigured profiles which you can adjust to your needs. To switch
profiles, click the battery monitor panel icon and select a different
<span class="guimenu">Power Profile</span>. The following profiles are available by
default:
</p><div class="variablelist"><dl><dt><span class="term">Performance</span></dt><dd><p>
Keep your machine running with full power and full speed to achieve
maximum performance.
</p></dd><dt><span class="term">Presentation</span></dt><dd><p>
Disable any display power management and screen savers to make sure
that your presentation is not interrupted by a blanked display or
something similar.
</p></dd><dt><span class="term">Powersave</span></dt><dd><p>
Apply power management methods to make sure that your machine runs as
long as possible when put on battery power instead of AC power.
</p></dd><dt><span class="term">Aggressive Powersave</span></dt><dd><p>
Apply stricter power management methods when the battery is at a low
level. These include shorter idle intervals before triggering suspend
events, reducing screen brightness, disabling 3D effects and using CPU
scaling policies that preserve resources.
</p></dd><dt><span class="term">Xtreme Powersave</span></dt><dd><p>
Apply extreme power saving by reducing screen brightness even more and
using stricter idle time and CPU scaling policies when the battery is
already at warning level.
</p></dd></dl></div></div><div class="sect1" title="9.3. Configuring Power Management"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sec.kpowersave.configure"></a>9.3. Configuring Power Management<span class="permalink"><a alt="Permalink" title="Copy Permalink" href="#sec.kpowersave.configure">¶</a></span></h2></div></div></div><p>
KDE 4 lets you adjust a number of power management settings: for example,
when to trigger notifications or warnings, which power profile to use
when running on battery, what to do when closing the laptop lid or
pressing the power or sleep button.
</p><p>
Access the configuration options from the main menu by selecting
<span class="guimenu">Configure
Desktop</span>+<span class="guimenu">Advanced</span>+<span class="guimenu">Power
Management</span>. Conversely, click the battery monitor
icon in the panel and click select <span class="guimenu">More</span>.
</p><div class="figure"><a name="id421515"></a><p class="title"><b>Figure 9.2. Power Management Settings</b></p><div class="figure-contents"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" cellspacing="0" cellpadding="0" width="55%"><tr><td><img src="images/kde_power_management_main.png" width="100%" alt="Power Management Settings"></td></tr></table></div></div></div><br class="figure-break"><p>
To get an overview of your system's power management abilities like
supported suspend methods or CPU policies, click the
<span class="guimenu">Capabilities</span> category on the left.
</p><p>
In the following, find some examples of which aspects can be changed in
the <span class="guimenu">General Settings</span> category and how to configure
power management profiles.
</p><div class="procedure" title="Procedure 9.1. Configuring General Settings"><a name="pro.kpowersave.configure.settings"></a><p class="title"><b>Procedure 9.1. Configuring General Settings</b><span class="permalink"><a alt="Permalink" title="Copy Permalink" href="#pro.kpowersave.configure.settings">¶</a></span></p><p>
To access the following options, click the <span class="guimenu">General
Settings</span> entry on the left side of the power management
configuration dialog.
</p><ol class="procedure" type="1"><li><p>
In the <span class="guimenu">Settings and Profiles</span> group, decide if the
screen should be locked after a suspend action, so that the user needs
to type in his password when the machine resumes after a suspend.
</p></li><li><p>
Configure which notifications or warnings you want to receive for
certain events (like low battery status), or if you want suspend
actions to be executed immediately or only after a certain time
interval.
</p></li><li><p>
In <span class="guimenu">Profile Assignment</span>, decide which power profiles
should be applied by default when the system is running on AC power, on
battery, or when the battery is low or at warning level.
</p></li><li><p>
Click <span class="guimenu">Advanced Battery Settings</span> if you want to
fine-tune the battery levels that are regarded as low or critical or to
define which action should be taken at a critical battery level.
</p></li><li><p>
For detailed information about the available options, click
<span class="guimenu">Help</span>.
</p></li><li><p>
If all options are set according to your wishes, click
<span class="guimenu">Apply</span>.
</p></li></ol></div><div class="procedure" title="Procedure 9.2. Configuring Power Management Profiles"><a name="pro.kpowersave.configure.profiles"></a><p class="title"><b>Procedure 9.2. Configuring Power Management Profiles</b><span class="permalink"><a alt="Permalink" title="Copy Permalink" href="#pro.kpowersave.configure.profiles">¶</a></span></p><p>
Apart from the general settings, you can adjust the default power
management profiles or add new profiles in the <span class="guimenu">Edit
Profiles</span> category. The list at the left show the available
profiles.
</p><ol class="procedure" type="1"><li><p>
Select one of the profiles in the list to view or change the specific
settings for that profile:
</p><ol type="a" class="substeps"><li><p>
In the <span class="guimenu">Actions</span> group, decide which actions are
taken when the lid of the laptop is closed or the
<span class="keycap">Power</span> or <span class="keycap">Sleep</span> button is pressed.
</p></li><li><p>
In the <span class="guimenu">Screen</span> group, configure how much the screen
is dimmed and after how many minutes the display is turned off
automatically.
</p><div class="informalfigure"><div class="mediaobject"><table border="0" summary="manufactured viewport for HTML img" cellspacing="0" cellpadding="0" width="55%"><tr><td><img src="images/kde_power_management_profiles.png" width="100%"></td></tr></table></div></div></li><li><p>
Click <span class="guimenu">CPU and System</span> to view or change which CPU
to turn off (if supported by your machine) or to set the CPU
frequency scaling policy for that profile.
</p></li></ol></li><li><p>
Use the icons at the bottom of the list of profiles if you want to add,
delete, import or export power management profiles.
</p></li><li><p>
If all options are set according to your wishes, click
<span class="guimenu">Apply</span>.
</p></li></ol></div></div></div><div class="navfooter"><table width="100%" summary="Navigation footer" border="0" class="bctable"><tr><td width="80%"><div class="breadcrumbs"><p><a href="index.html"> Documentation</a><span class="breadcrumbs-sep"> > </span><a href="book.kdeuser.html">KDE User Guide</a><span class="breadcrumbs-sep"> > </span><a href="part.kde.manage.html">Managing Files and Resources</a><span class="breadcrumbs-sep"> > </span><strong><a accesskey="p" title="Chapter 8. Managing Passwords with KWallet Manager" href="cha.kde.kwallet.html"><span>◀</span></a> </strong></p></div></td></tr></table></div></body></html>
ACC SHELL 2018