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Wireless problem sir i have dell latitude 520 laptop with xp os and i wan't to switch over to ubuntu but when i did so the wireless driver did'nt work further i don't know how to configure it so kindly help please reply me at [email protected]

Answers :

I'm Guessing your using Ubuntu 7.04... Due to a bug in the native driver shipped with Ubuntu, the\015\012wireless card on this laptop is detected and installed but you cannot\015\012find any wireless networks. Here’s how to fix it.
\015\012* Let’s disable the native Ubuntu driver. Type this in a terminal:
\015\012gksu gedit /etc/modprobe.d/blacklist
\015\012and insert at the very end of the file:
\015\012# buggy broadcom wireless driver
\015\012blacklist bcm43xx

\015\012* Next, do this in a terminal:
\015\012sudo rmmod bcm43xx
\015\012* Now, let’s download and install the windows driver for the\015\012wireless card. You have to download it from the Dell support website.\015\012Click here to download it.
\015\012Or you can use the direct link to the executable:
\015\012Since it’s a windows self-extracting executable, you need wine to use it:
\015\012sudo apt-get install wine
\015\012wine <path_to_R140747.EXE>
\015\012Replace <path_to_R140747.EXE>\015\012with the actual physical path to the file you downloaded from the Dell\015\012support website. Follow the instructions and extract the files to a\015\012folder of your choice. Alternatively, you could extract the files on a\015\012windows machine and copy them over to your ubuntu system.
\015\012* Now, let’s install ndiswrapper. We need it to load the windows driver.
\015\012sudo aptitude install ndisgtk ndiswrapper-common ndiswrapper-utils-1.9
\015\012* Let’s install the windows driver:
\015\012sudo ndiswrapper -i <location_of_bcmwl5.inf_file>
\015\012Replace <location_of_bcmwl5.inf_file> with the path to the bcmwl5.inf file you extracted earlier.
\015\012* Let’s make sure the driver is installed:
\015\012sudo ndiswrapper -l
\015\012You should get something like this:
\015\012bcmwl5 : driver installed
\015\012device (14E4:4311) present (alternate driver: bcm43xx)

\015\012* Now we need to set up ndiswrapper to load our new driver automatically:
\015\012sudo gedit /etc/modules
\015\012and add a new line that says:
\015\012That’s it, restart your laptop. During the restart, the wiFI LED\015\012should light up. If it doesn’t, try the Fn + F2 key combination. After\015\012the reboot, configure your network settings:
\015\012System -> Administration -> Networking
\015\012Enable the wireless connection and tinker with the connection\015\012settings if you need to. You may have to disable the wired connection\015\012because wireless and wired connections may not work simultaneously -\015\012your mileage may vary in this regard.
\015\012It seems Network Manager prevents the card from connecting to detected\015\012wireless networks. I advise you to remove it if you can detect wireless\015\012networks but cannot connect to them. To do this, type the following in\015\012a terminal:
\015\012sudo apt-get –purge remove network-manager network-manager-gnome
\015\012Alternatively, you can open Synaptic and remove these two packages.
\015\012* Summary:
\015\0121.) Install ndiswrapper
\015\012sudo apt-get install ndisgtk ndiswrapper-common ndiswrapper-utils-1.9
\015\0122.) Install the windows wireless driver
\015\012sudo ndiswrapper -i <location_of_bcmwl5.inf_file>
\015\012Remember to replace <location_of_bcmwl5.inf_file> with the actual path to the location of the bcmwl5.inf file
\015\0123,) Make sure the card has been detected and installed
\015\012ndiswrapper -l
\015\0124.) Disable the native ubuntu wireless driver
\015\012gksu gedit /etc/modprobe.d/blacklist
\015\012Insert at the very end of the file:
\015\012# buggy broadcom wireless driver
\015\012blacklist bcm43xx
\015\0125.) Remove Network Manager if it gives you problems
\015\012sudo apt-get –purge remove network-manager network-manager-gnome
\015\012You wireless card should be working flawlessly now.

I Hope this helps :)
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