Ubuntu Wireless with BCM4322
I have been having issues with the BCM4322 wireless card on my macbook pro under ubuntu. As it turns out after some digging the BCM4322 driver only supports the 'Rest of World' locale which does not include wireless channels 12 & 13. You can test this by trying:
sudo iwlist eth2 channel
Which on the macbook pro returns:
eth2 20 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 36 : 5.18 GHz
Channel 40 : 5.2 GHz
Channel 44 : 5.22 GHz
Channel 48 : 5.24 GHz
Channel 149 : 5.745 GHz
Channel 153 : 5.765 GHz
Channel 157 : 5.785 GHz
Channel 161 : 5.805 GHz
Channel 165 : 5.825 GHz
Current Channel:1
As you can see, no channels 12 & 13. Since my router had been set to 13 (it was less popular in my area) this resulted in no wireless for ubuntu. After a quick change to the channel setting on the router, ubuntu can see my wireless network. To find a channel which is not too crowded try using nm-tool or perhaps:
sudo iwlist eth2 scan | grep Channel
Written on March 20, 2010