HP Pavilion dm1 (E-450/HD 6320) and Ubuntu 11.10

Wireless (BMC4313) Drivers:

There seems to be some issues with the current range of broadcom drivers, there are several options and some barely work and give very poor wireless signal and flaky connections.

Check you wireless card lspci | grep Broadcom

Output:

03:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) […]