Wireless nic

Janina Sajka janina at rednote.net
Fri Aug 3 12:05:34 EDT 2007


Juan Hernandez writes:
> HI guys,
> Heres a weird one,
> So I never got my wireless adapter ipw3945 to work, so I said what the hell,
> and reinstalled fedora.
> I reinstalled fc7, and rebooted.  And I noticed that wlan0 was loaded, and I
> enabled a wifi connection to my access point, and shabang... It worked, I
> was on the net and everything.

Overkill, but at least now you know it works. More below.

> I then proceeded to shut my notebook down,
> and a day later, I rebooted, and it no longer found my wlan0... It was using
> the iwl3945 wireless module.  Any ideas why my wlan0 device disapeared?

No way to answer that with just this amount of data, however do the

1.)	Look for the i2l3945 in /etc/modprobe.conf.

2.)	Do 'lsmod |grep iwl3945'
Is the driver loaded? If not, modprobe it.

3.)	Do an iwconfig. Is the wlan0 device there and does it show
wireless extensions? Does it show a reasonably strong radio signal? Is
the essid correct? etc., etc ...

4.)	Does the wlan0 device have an ip address? Do 'ifconfig wlan0' to
find out. Does some other device, something other than localhost, have
an address? Perhaps your wired connection?

5.)	Is dhclient running? Do 'pidof dhclient' to find out.

6.)	Do you have a route? Do 'route' to find out.
If not, you can add a route with:

route add default gw xxx.xxx.xxx.xxx wlan0

All of the above is implicated in making a successful wireless
connection, and this is just on the Fedora side. iPlease note it is also possible the problem is on your dhcp server or wap device.

The files involved in automating all of this in Fedora are
/etc/sysconfig/network and /etc/sysconfig/network-scripts/ifcfg-*.
Output acquired via dhclient is cached in /var/lib/dhclient.


PS: I will help you further, if I can, but please provide the kind of
specificity I note above if you'd like me to try and do that.

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