Wireless Not Finding Networks

My Broadcom wireless (05:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)) worked well for quite a while until recently. As far as I know, I didn't make any system changes but I am no longer able to detect wireless networks. I am physically close to the router and other computers can connect to it.
I run "sudo modprobe -a b43 mac80211 cfg80211" and "sudo ifconfig wlan0 up" with no complaint but when I do "sudo iwlist wlan0 scan", it tells me that there are no scan results despite the presence of a network. Any suggestions?
Last edited by intrados (2008-12-13 05:14:00)

Can you test that the card itself works . . . like with a Windows dual boot, or with an Ubuntu or Arch or other live CD? I have the 4311 in my HP dv6000 and it works fine with the b43 driver. You could also try the wl driver from Broadcom (broadcom-wl in the AUR). Make sure that another wireless driver isn't loaded at the same time (ndiswrapper, wl, bcm43xx). . . that's bitten me before when booting some live CDs or forgetting to add an entry to the modprobe blacklist.
Good luck!
Scott

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