i have a broadcom BCM4311 802.11b/g WLAN [14e4:4311] (rev 01) wireless adapter on a dell 1501 run by ubuntu 10.10.
this particular model and revision is suppose to be absolutely supported by linux and indeed it did work perfectly before the user ran a upgrade from ubuntu 10.10 to 11.04.
subsequently i have reinstalled 10.10. as i recall when i installed ubuntu 10.10 the first time i simply ran the System>Admin>Additional Driver installation tool to make the wireless work. i cannot recall if i ran the b43 or the sta driver but i have tried both this time and had no luck.
i am aware that the broadcom adapters are notoriously troublesome and i have tried the two workarounds here http://ubuntuforums.org/showthread.php?t=1604868
as well as their third alternate workaround with no success.
please advise if you can.