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First, this really isn't an Ubuntu or a Debian or a Mint issue. The problem likely lies with Broadcom and their lack of availability of firmware information for their wireless hardware. Broadcom does make a "generic" wireless driver for Linux, but it allegedly doesn't work with everything. Therefore, the Ubuntu development team have had to use fwcutter to pull the firmware information from a Windows driver to build one that works for Linux. Here's the fix, and I'm pretty sure this will work for most situations:
1. Determine the exact model and firmware version of the driver. Open a terminal and enter:
[b]lspci -vnn -d 14e4:[/b].
2. You'l get a string back that looks like this:
[i]0001:01:01.0 Network controller : Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller [14e4:4318] (rev 02)[/i]
Look at the section between the brackets at the "14e4" part near the end.
3. Go here and make sure your adapter is compatible with the Broadcom b43 driver, on the chart about a quarter way down the page:
4. If you're in the green area, you're good to go. Now, the Ubuntu/Debian folks have made this easy for us. Just run this command:
[b]sudo apt-get install firmware-b43-installer[/b]
5. Reboot and you're done.
This worked perfectly on the proprietary Windows 7 Compaq boat anchor my wife calls a laptop.
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