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Possible Duplicate:
How to Install Broadcom / STA Wireless card (BCM43XX)

Upgraded Ubuntu to 11.04, now wireless card does not work when I unplug the laptop

lspci -vvnn | grep 14e4

10:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM5787M Gigabit Ethernet PCI Express [14e4:1693] (rev 02)
30:00.0 Network controller [0280]: Broadcom Corporation BCM4321 802.11a/b/g/n [14e4:4328] (rev 03)
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jhurley
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2 Answers2

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You could try finding out what driver your wireless card uses by running

lsmod | egrep "b43|wl|brcm80211"

and then running

sudo rmmod yourdriver
sudo modprobe yourdriver

Since your wireless card is the BCM4321, you're likely running the wl driver (a.k.a. Broadcom STA), so you would run

sudo rmmod wl
sudo modprobe wl
Andrew Gunnerson
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pm-powersave turns wireless OFF when switching to battery. See my answer Why is wireless down/strange after switching to battery or closing/opening the lid?

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waltinator
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