27
<title>Wireless connection troubleshooter</title>
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<subtitle>Check that the wireless adapter was recognized</subtitle>
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<p>Even though the wireless adapter is connected to the computer, it may not have been recognized as a network device by the computer. In this step, you will check whether the device was recognized properly.</p>
34
<p>Open a Terminal window, type <cmd>lshw -C network</cmd> and press <key>Enter</key>. If this gives an error message, you may need to install the <app>lshw</app> program on your computer.</p>
37
<p>Look through the information that appeared and find the <em>Wireless interface</em> section. If your wireless adapter was detected properly, you should see something similar (but not identical) to this:</p>
38
<code><![CDATA[*-network
31
<title>Wireless connection troubleshooter</title>
32
<subtitle>Check that the wireless adapter was recognized</subtitle>
34
<p>Even though the wireless adapter is connected to the computer, it may not
35
have been recognized as a network device by the computer. In this step, you
36
will check whether the device was recognized properly.</p>
40
<p>Open a Terminal window, type <cmd>lshw -C network</cmd> and press
41
<key>Enter</key>. If this gives an error message, you may need to install
42
the <app>lshw</app> program on your computer.</p>
45
<p>Look through the information that appeared and find the <em>Wireless
46
interface</em> section. If your wireless adapter was detected properly,
47
you should see something similar (but not identical) to this:</p>
48
<code><![CDATA[*-network
39
49
description: Wireless interface
40
50
product: PRO/Wireless 3945ABG [Golan] Network Connection
41
51
vendor: Intel Corporation]]></code>
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<p>If a wireless device is listed, continue on to the <link xref="net-wireless-troubleshooting-device-drivers">Device Drivers step</link>.</p>
45
<p>If a wireless device is <em>not</em> listed, the next steps you take will depend on the type of device that you use. Refer to the section below that is relevant to the type of wireless adapter that your computer has (<link xref="#pci">internal PCI</link>, <link xref="#usb">USB</link>, or <link xref="#pcmcia">PCMCIA</link>).</p>
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<p>If a wireless device is listed, continue on to the
55
<link xref="net-wireless-troubleshooting-device-drivers">Device Drivers
57
<p>If a wireless device is <em>not</em> listed, the next steps you take
58
will depend on the type of device that you use. Refer to the section
59
below that is relevant to the type of wireless adapter that your computer
60
has (<link xref="#pci">internal PCI</link>, <link xref="#usb">USB</link>,
61
or <link xref="#pcmcia">PCMCIA</link>).</p>
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<title>PCI (internal) wireless adapter</title>
51
<p>Internal PCI adapters are the most common, and are found in most laptops made within the past few years. To check if your PCI wireless adapter was recognized:</p>
53
<item><p>Open a Terminal, type <cmd>lspci</cmd> and press <key>Enter</key>.</p></item>
55
<p>Look through the list of devices that is shown and find any that are marked <code>Network controller</code> or <code>Ethernet controller</code>. Several devices may be marked in this way; the one corresponding to your wireless adapter might include words like <code>wireless</code>, <code>WLAN</code>, <code>wifi</code> or <code>802.11</code>. Here is an example of what the entry might look like:</p>
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<code>Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection</code>
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<item><p>If you found your wireless adapter in the list, proceed to the <link xref="net-wireless-troubleshooting-device-drivers">Device Drivers step</link>. If you didn't find anything related to your wireless adapter, see <link xref="#not-recognized">the instructions below</link>.</p></item>
66
<title>PCI (internal) wireless adapter</title>
68
<p>Internal PCI adapters are the most common, and are found in most laptops
69
made within the past few years. To check if your PCI wireless adapter was
74
<p>Open a Terminal, type <cmd>lspci</cmd> and press <key>Enter</key>.</p>
77
<p>Look through the list of devices that is shown and find any that are
78
marked <code>Network controller</code> or <code>Ethernet
79
controller</code>. Several devices may be marked in this way; the one
80
corresponding to your wireless adapter might include words like
81
<code>wireless</code>, <code>WLAN</code>, <code>wifi</code> or
82
<code>802.11</code>. Here is an example of what the entry might look
84
<code>Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection</code>
87
<p>If you found your wireless adapter in the list, proceed to the
88
<link xref="net-wireless-troubleshooting-device-drivers">Device Drivers
89
step</link>. If you didn't find anything related to your wireless
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<link xref="#not-recognized">the instructions below</link>.</p>
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<title>USB wireless adapter</title>
64
<p>Wireless adapters that plug into a USB port on your computer are less common. They can plug directly into a USB port, or may be connected by a USB cable. 3G/mobile broadband adapters look quite similar to wireless (wifi) adapters, so if you think you have a USB wireless adapter, double-check that it is not actually a 3G adapter. To check if your USB wireless adapter was recognized:</p>
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<item><p>Open a Terminal, type <cmd>lsusb</cmd> and press <key>Enter</key>.</p></item>
68
<p>Look through the list of devices that is shown and find any that seem to refer to a wireless or network device. The one corresponding to your wireless adapter might include words like <code>wireless</code>, <code>WLAN</code>, <code>wifi</code> or <code>802.11</code>. Here is an example of what the entry might look like:</p>
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<code><![CDATA[Bus 005 Device 009: ID 12d1:140b Huawei Technologies Co., Ltd. EC1260 Wireless Data Modem HSD USB Card]]></code>
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<item><p>If you found your wireless adapter in the list, proceed to the <link xref="net-wireless-troubleshooting-device-drivers">Device Drivers step</link>. If you didn't find anything related to your wireless adapter, see <link xref="#not-recognized">the instructions below</link>.</p></item>
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<title>USB wireless adapter</title>
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<p>Wireless adapters that plug into a USB port on your computer are less
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common. They can plug directly into a USB port, or may be connected by a USB
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cable. 3G/mobile broadband adapters look quite similar to wireless (wifi)
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adapters, so if you think you have a USB wireless adapter, double-check that
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it is not actually a 3G adapter. To check if your USB wireless adapter was
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<p>Open a Terminal, type <cmd>lsusb</cmd> and press <key>Enter</key>.</p>
112
<p>Look through the list of devices that is shown and find any that seem
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to refer to a wireless or network device. The one corresponding to your
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wireless adapter might include words like <code>wireless</code>,
115
<code>WLAN</code>, <code>wifi</code> or <code>802.11</code>. Here is an
116
example of what the entry might look like:</p>
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<code><![CDATA[Bus 005 Device 009: ID 12d1:140b Huawei Technologies Co., Ltd. EC1260 Wireless Data Modem HSD USB Card]]></code>
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<p>If you found your wireless adapter in the list, proceed to the
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<link xref="net-wireless-troubleshooting-device-drivers">Device Drivers
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step</link>. If you didn't find anything related to your wireless
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<link xref="#not-recognized">the instructions below</link>.</p>
75
130
<section id="pcmcia">
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<title>Checking for a PCMCIA device</title>
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<p>PCMCIA wireless adapters are typically rectangular cards which slot into the side of your laptop. They are more commonly found in older computers. To check if your PCMCIA adapter was recognized:</p>
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<item><p>Start your computer <em>without</em> the wireless adapter plugged in.</p></item>
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<p>Open a Terminal and type the following, then press <key>Enter</key>:</p>
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<code>tail -f /var/log/messages</code>
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<p>This will display a list of messages related to your computer's hardware, and will automatically update if anything to do with your hardware changes.</p>
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<item><p>Insert your wireless adapter into the PCMCIA slot and see what changes in the Terminal window. The changes should include some information about your wireless adapter. Look through them and see if you can identify it.</p></item>
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<item><p>To stop the command from running in the Terminal, press <keyseq><key>Ctrl</key><key>C</key></keyseq>. After you have done that, you can close the Terminal if you like.</p></item>
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<item><p>If you found any information about your wireless adapter, proceed to the <link xref="net-wireless-troubleshooting-device-drivers">Device Drivers step</link>. If you didn't find anything related to your wireless adapter, see <link xref="#not-recognized">the instructions below</link>.</p></item>
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<title>Checking for a PCMCIA device</title>
133
<p>PCMCIA wireless adapters are typically rectangular cards which slot into
134
the side of your laptop. They are more commonly found in older computers. To
135
check if your PCMCIA adapter was recognized:</p>
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<p>Start your computer <em>without</em> the wireless adapter plugged
143
<p>Open a Terminal and type the following, then press
144
<key>Enter</key>:</p>
145
<code>tail -f /var/log/messages</code>
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<p>This will display a list of messages related to your computer's
147
hardware, and will automatically update if anything to do with your
148
hardware changes.</p>
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<p>Insert your wireless adapter into the PCMCIA slot and see what
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changes in the Terminal window. The changes should include some
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information about your wireless adapter. Look through them and see if you
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<p>To stop the command from running in the Terminal, press
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<keyseq><key>Ctrl</key><key>C</key></keyseq>. After you have done that,
159
you can close the Terminal if you like.</p>
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<p>If you found any information about your wireless adapter, proceed to
163
the <link xref="net-wireless-troubleshooting-device-drivers">Device
164
Drivers step</link>. If you didn't find anything related to your wireless
165
adapter, see <link xref="#not-recognized">the instructions
91
171
<section id="not-recognized">
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<title>No s'ha reconegut l'adaptador de la xarxa sense fils</title>
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<p>If your wireless adapter was not recognized, it might not be working properly or the correct drivers may not be installed for it. How you check to see if there are any drivers you can install will depend on which Linux distribution you are using (like Ubuntu, Fedora or openSuSE).</p>
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<p>To get specific help, look at the support options on your distribution's website. These might include mailing lists and web chats where you can ask about your wireless adapter, for example.</p>
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<title>No s'ha reconegut l'adaptador de la xarxa sense fils</title>
174
<p>If your wireless adapter was not recognized, it might not be working
175
properly or the correct drivers may not be installed for it. How you check to
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see if there are any drivers you can install will depend on which Linux
177
distribution you are using (like Ubuntu, Fedora or openSuSE).</p>
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<p>To get specific help, look at the support options on your distribution's
180
website. These might include mailing lists and web chats where you can ask
181
about your wireless adapter, for example.</p>
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