can't get BCM4312 [14e4:4315] after upgrade from 10.04LTS to 12.04LTS

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http://askubuntu.com – Based on answers to other questions, I have tried b43 and STA drivers w/o success and have probably caused additional problems along the way. Also based on info requested in connection with other similar questions, I am providing the contentd of blacklist.conf, blacklist-local.conf and jockey.log. Other possibly useful information: can connect via an USB WLAN adapter; Broadcom STA driver is listed in other drivers but it is not activated. Will appreciate any assistance that can be provided. Thank you. KNS ========================== blacklist.conf This file lists those modules which we d (HowTos)