[ubuntu] Inspiron 1720 wireless issue

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http://ubuntuforums.org – I had Ubuntu 11.04 installed and all was working perfectly, however, I have now upgraded to 11.10 and cannot connect to internet wirelessly. I have had the same issue when trying out other Linux distros such as Open Suse and Mandriva. I followed the advice in the Solved posting at http://ubuntuforums.org/showthread.php?t=1974006 This doesnt seem to have worked, though. lsmod shows B43-Size31816Used by 0; and ssb-Size50682Used by 1 b43 My lspci -nn | grep 0280 output is 0c: 00.0 network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY[14e4:4315] (rev 01). Any help and/or ideas w (Hardware)