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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | <html><head><title>Suspending and Hibernating</title><link rel="stylesheet" type="text/css" href="help:/common/kde-default.css"><link rel="stylesheet" type="text/css" href="help:/common/kde-docs.css"><link rel="stylesheet" type="text/css" href="help:/common/kde-localised.css"><link rel="stylesheet" type="text/css" href="help:/common/kubuntu.css"><meta name="generator" content="DocBook XSL Stylesheets V1.76.1"><link rel="home" href="index.html" title="Hardware"><link rel="up" href="index.html" title="Hardware"><link rel="prev" href="laptops.html" title="Laptops"><link rel="next" href="input-devices.html" title="Mice and Keyboards"><link rel="copyright" href="legal.html" title="Credits and License"><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><meta name="GENERATOR" content="KDE XSL Stylesheet V1.14 using libxslt"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div id="content"><div id="header"><div id="header_content"><div id="header_left"><div id="header_right"><img src="help:/common/top-kde.jpg" width="36" height="34"> Suspending and Hibernating</div></div></div></div><div class="navCenter"><table class="navigation"><tr><td class="prevCell"><a accesskey="p" href="laptops.html">Prev</a></td><td class="upCell"> </td><td class="nextCell"><a accesskey="n" href="input-devices.html">Next</a></td></tr></table></div><div id="contentBody"><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="pm-suspending"></a>Suspending and Hibernating</h2></div></div></div><p>
In order to save power, a computer can be put into one of a number of
power-saving modes when it is not being used.
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
<span class="strong"><strong>Suspending</strong></span> a computer is like putting the
computer to sleep. The computer will still be turned on and all work will be
left open, but it will use much less power. Wake the computer by pressing a key
or clicking the mouse.
</p></li><li class="listitem"><p>
<span class="strong"><strong>Hibernating</strong></span> means turning the computer off
completely while saving the current state of the computer (such as keeping all
open documents). When the computer is turned back on after hibernation, all work
will be restored as it was before hibernation. No power is used when the
computer is hibernating.
</p></li><li class="listitem"><p>
<span class="strong"><strong>Shutting down</strong></span> is turning the computer off
completely, without saving the current state of the computer. No power is used
when the computer is shut down.
</p></li><li class="listitem"><p>
<span class="strong"><strong>Resuming</strong></span> is bringing the computer out of a
power-saving mode and back into normal operation. The computer can be resumed
from being suspended by pressing a keyboard button or by clicking the mouse.
Resume from being hibernated by pressing the power button on the computer.
</p></li></ul></div><p>
Manually put the computer into power-saving mode by selecting one of the options
in the <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="guiitem"><span class="guilabel">System</span></span> section of the <span xmlns:doc="http://nwalsh.com/xsl/documentation/1.0" class="guiitem"><span class="guisubmenu">Leave</span></span>
menu in Kickoff.
</p><div class="caution" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Caution</h3><p>
Some computers may have problems going into and resuming from certain
power-saving modes. The best way of checking if a computer can handle a
power-saving mode is to try it. Switch to that mode and see if it behaves as
expected. Always save important documents before suspending or hibernating.
</p></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="pm-suspend-hibernate-fails"></a>The computer does not suspend or hibernate correctly</h3></div></div></div><p>
Some computers are unable to suspend or hibernate correctly with <span>Kubuntu</span>, and
may show some of the following symptoms:
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
The computer does not turn off after hibernate has been clicked.
</p></li><li class="listitem"><p>
When the computer is turned back on after hibernating, previously open programs
are not restored.
</p></li><li class="listitem"><p>
The computer will not wake up after it has been suspended.
</p></li><li class="listitem"><p>
Certain programs or hardware devices stop working correctly after resuming from
hibernation or waking-up from being suspended.
</p></li></ul></div><p>
If any of these problems occur, a bug should be reported to <a class="ulink" href="https://bugs.launchpad.net/ubuntu/+filebug" target="_top">Launchpad</a>. The problems
may be fixed in a subsequent version of <span>Kubuntu</span>.
</p><p>
If the hardware does not work properly after suspending or hibernating, restart
the computer and it should return to normal. If a program does not work
properly, try closing the program and then starting it again.
</p><div class="caution" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Caution</h3><p>
Make sure to save all open documents before testing for suspend and hibernate
problems.
</p></div></div><div class="sect2"><div class="titlepage"><div><div><h3 class="title"><a name="pm-hibernate-pattern"></a>There's a strange pattern on the screen when the computer is
hibernated</h3></div></div></div><p>
The screen may show a black and white pattern just after it is clicked to
hibernate. This is usually nothing to worry about and is just how the
graphics cards of some computers respond to the initial stages of the
hibernation process.
</p><p>
If the computer displays the pattern for a prolonged period of time without
turning itself off then there may be a problem with hibernation. Refer to <a class="link" href="pm-suspending.html#pm-suspend-hibernate-fails" title="The computer does not suspend or hibernate correctly">The computer does not suspend or hibernate
correctly</a> for more information.
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