wireless disabled after installing update and restarting (dual boot ubuntu/win7)
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Okay, this is going to sound stupid, but I have to ask anyway. Nearly all laptops, netbooks, and other mobile devices have a switch somewhere that enables or disables the internal wireless card. Did you try this switch? If that doesn't work, then make sure that the Broadcom STA driver is installed instead of b43. There should be a tool called "jockey" installed. Open up the Synaptic package manager and have a look. You can also check the System menu in the default Gnome desktop install, and look for something named "Additional Drivers". It looks kind of like a computer chip with a padlock on it.
Well, first off, Windows and Linux are both operating systems, and only one OS can run at a time (there are exceptions to this, but let's keep it simple). Therefore, when one OS is running, the other can't do anything.
Now for the drivers. When you boot into Ubuntu, open up a terminal (should be in the menu under "Accessories") and run the this command:
lsmod | grep wl
The | character is the pipe symbol. It should be on the same key as \. If you don't get anything, then the Broadcom STA driver is not loaded.
The first line tells you what the name of the driver is, which you will use in the second line (most probably it is b43-fwcutter).
If your card is listed in the supported devices section, you should be using the Broadcom-STA driver, even if b43 worked for some time with your card. First purge the b43 driver, You can install it using the LiveCD itself, following the guide here ("No internet access" - I assume you have no internet access right now, if you do, just plug in an ethernet cable and follow the same guide):
It is a little outdated - you do not need to install all of dkms, patch, fakeroot and bcmwl-kernel-source - I do not remember which ones but the ones you don't will be missing on the CD anyway, since they are automatically installed.
since these two may not be disabled if you tried the b43 driver.
You should then have internet access upon reboot. I have a Broadcom card, and it has been one of the greatest hassles when installing a distro. It has also been one of the biggest sources of all my learning experience when I learned how to circumvent those hassles.
I don't know why the echo command dues not work for you, but in that case you should edit the file by hand:
$ sudo nano /etc/modules.d/blacklist
And add the names b43 and ssb at the bottom, press Ctrl + O to save, and then reboot. The broadcom driver should work now since it is activated. Also note that 'broadcom' is spelt with a single m, so make sure that that does not give you trouble at any point.
Last edited by manzdagratiano; 06-30-2011 at 02:25 PM.