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Ran current Ubuntu off USB, needed to enable "Broadcom 802.11 Linux STA wireless driver ..." by clicking Apply Changes in Additional Drivers. Having done that was able to connect to wifi without problem.

Whilst connected, I "Installed" Ubuntu on my HP Mini 110, cleaning everything off the drive. Updates were downloaded and everything was peachy. Prompted to Reboot, I did so and encountered again the need to Apply Changes to get the wireless working.

But now, clicking on Apply Changes does nothing but reset the button to "Do not use this device". I cannot enable the Broadcom driver and, of course, cannot connect to wifi.

In summary: works fine when booted from USB; doesn't work when booted from installed Ubuntu.

Thx.

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up vote 1 down vote accepted

First, go to additional drivers, the the tab marked "Ubuntu Software". Check the box marked "Proprietary Drivers for Devices". Then enter into a terminal:

sudo apt-get update
sudo apt-get install bcmwl-kernel-source

Your wifi should then be enabled, if not go back to additional drivers and try to enable your device again.

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No joy. Lots of "Err" and "Failed to fetch". Need computer have 'net access to "get updates"? Should I run it from the functioning USB boot? Or from a wired connection (which is difficult to get where I am)? Thx – user274531 Apr 28 '14 at 3:13
    
I also got this message: The following packages have unmet dependencies: bcmwl-kernel-source : Depends: dkms but it is not installable E. Unable to correct problems, you have held broken packages. – user274531 Apr 28 '14 at 3:46
    
Success! Hooked up a wired connection - which was no problem - followed the suggestion provided here (twice ...) and the Broadcom driver was installable and wireless connection now works. Thx. – user274531 May 1 '14 at 10:29
up vote 5 down vote

This was the same case for me, but the drivers that worked on the bootable USB are still on the USB. If you first open the bootable USB in a file explorer then search with ctrl+F for "dkms" and install that .deb file and then search for "bcmwl" and install that .deb then your card will work again.

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This is the right answer if a wired connection is not an option. – Jackbijou Dec 23 '15 at 20:52

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