Supported chipset for b43 Broadcom Linux drivers are :
- bcm4303 (802.11b-only chips)
- bcm4306
- bcm4311 rev 2 / bcm4312 (needs patches for 2.6.24)
- bcm4309 (only the 2.4GHz part)
- bcm4318
and unsupported are:
- BCM 4309 and BCM 4312 is not supported.
- BCM 4328/4329
Please refer to this post, Ubuntu Hardy Heron : Wifi Broadcom Support with b43 driver for a guide to activate B43 Linux driver in order to use wifi function in your laptop.