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<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" type="topic" style="task" id="net-wireless-troubleshooting-device-drivers" xml:lang="fi">

  <info>
    <link type="guide" xref="net-wireless-troubleshooting"/>

    <revision pkgversion="3.4.0" date="2012-03-05" status="outdated"/>
    <revision pkgversion="3.10" date="2013-11-10" status="review"/>
    <revision pkgversion="3.18" date="2015-09-28" status="final"/>

    <credit type="author">
      <name>Ubuntun dokumentaatio-wikin tekoon osallistuneet</name>
    </credit>

    <credit type="author">
      <name>Phil Bull</name>
      <email>philbull@gmail.com</email>
    </credit>

    <include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>

    <desc>Some device drivers don’t work very well with certain wireless
    adapters, so you may need to find a better one.</desc>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Timo Jyrinki</mal:name>
      <mal:email>timo.jyrinki@iki.fi</mal:email>
      <mal:years>2012.</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Jiri Grönroos</mal:name>
      <mal:email>jiri.gronroos+l10n@iki.fi</mal:email>
      <mal:years>2012-2025.</mal:years>
    </mal:credit>
  </info>

  <title>Langattoman verkon vianselvitys</title>

  <subtitle>Varmista, että toimivat laitteistoajurit on asennettu</subtitle>

<!-- Needs links (see below) -->

  <p>Tässä vaiheessa tarkistetaan, että langattomalle verkkosovittimelle löytyy toimivat ajurit. <em>Laiteajuri</em> on ohjelmiston osa, joka osaa kommunikoida laitteiden kanssa. Vaikka tietokone on tunnistanut langattoman verkkosovittimen, kunnolla toimivia ajureita ei välttämättä ole asennettu. On mahdollista, että langattomalle verkkosovittimelle löytyy toinen ajuri, joka toimii paremmin. Kokeile seuraavia vaihtoehtoja:</p>

  <list>
    <item>
      <p>Tarkista, että langaton verkkokorttisi on tuettujen laitteiden listalla.</p>
      <p>Most Linux distributions keep a list of wireless devices that they
      have support for. Sometimes, these lists provide extra information on how
      to get the drivers for certain adapters working properly. Go to the list
      for your distribution (for example,
      <link href="https://help.ubuntu.com/community/WifiDocs/WirelessCardsSupported">Ubuntu</link>,
      <link href="https://wiki.archlinux.org/index.php/Wireless_network_configuration">Arch</link>,
      <link href="https://wireless.wiki.kernel.org/en/users/Drivers">Fedora</link> or
      <link href="http://en.opensuse.org/HCL:Network_(Wireless)">openSUSE</link>)
      and see if your make and model of wireless adapter is listed. You may be
      able to use some of the information there to get your wireless drivers
      working.</p>
    </item>
    <item>
      <p>Etsi rajoitettuja ajureita (binäärejä).</p>
      <p>Many Linux distributions only come with device drivers which are
      <em>free</em> and <em>open source</em>. This is because they cannot
      distribute drivers which are proprietary, or closed-source. If the
      correct driver for your wireless adapter is only available in a non-free,
      or “binary-only” version, it may not be installed by default. If this is
      the case, look on the wireless adapter manufacturer’s website to see if
      they have any Linux drivers.</p>
      <p>Some Linux distributions have a tool that can download restricted
      drivers for you. If your distribution has one of these, use it to see if
      it can find any wireless drivers for you.</p>
    </item>
    <item>
      <p>Käytä sovittimen Windows-ajureita.</p>
      <p>In general, you cannot use a device driver designed for one operating
      system (like Windows) on another operating system (like Linux). This is
      because they have different ways of handling devices. For wireless
      adapters, however, you can install a compatibility layer called
      <em>NDISwrapper</em> which lets you use some Windows wireless drivers on
      Linux. This is useful because wireless adapters almost always have
      Windows drivers available for them, whereas Linux drivers are sometimes
      not available. You can learn more about how to use NDISwrapper
      <link href="https://sourceforge.net/p/ndiswrapper/ndiswrapper/Main_Page/">here</link>.
      Note that not all wireless drivers can be used through NDISwrapper.</p>
    </item>
  </list>

  <p>If none of these options work, you may want to try a different wireless
  adapter to see if you can get that working. USB wireless adapters are often
  quite cheap, and will plug into any computer. You should check that the
  adapter is compatible with your Linux distribution before buying it,
  though.</p>

</page>
