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I have Ubuntu 12.10 on my laptop. For some reason - I don't exactly know which one - my wifi module doesn't work. So, I bought an external wifi module ASUS USB-N13.

I've installed all required drivers, but I still have to run this command on every system startup to make this adapter work:

sudo modprobe -r b43 ssb wl brcmfmac brcmsmac bcma

If I don't run this command in the network utility at the top of the desktop I see that wifi is disabled by hardware switch. So, I run this command to make adapter work.

And here's the question: after some time(may be 5-10 mins) connection is lost. I still can see all wifi networks enabled, but when I try to connect back to my home network password window appeared. When I enter my password windows disappears and in a minute it appears again. The password I'm enter is surely right. So, I have to unplug usb adapter and plug it again and after it wifi start works in normal mode for 5 or 10 mins and after it everything is back. Any ideas how I could solve my problem?

Thanks in advance.

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sudo modprobe -r b43 ssb wl brcmfmac brcmsmac bcma

The command removes these modules from the Linux Kernel

b43 ssb wl brcmfmac brcmsmac bcma

You can blacklist them so that when you boot these modules are not loaded anymore.

For that open the file /etc/modprobe.d/blacklist.conf using vim

vim /etc/modprobe.d/blacklist.conf

and insert these lines at the end of this file by pressing i (for insertion mode)

blacklist b43
blacklist ssb
blacklist wl
blacklist brcmfmac
blacklist brcmsmac
blacklist bcma

save and quit the file by pressing :wq followed by a enter

Reboot your pc and you should be using your wireless network without any kind of problem.

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,thx for your reply! But how can the problem of constant connection lost be connected with deleting this modules on startup instead of manual deletion them after system loads? Thanks. –  sof_dff Feb 14 '13 at 17:11
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