I have a desktop computer which I run mostly with a wired network connection. When I start the Wicd network manager it says No wireless networks found. Also, the command iwlist gives the same result:# iwlist scaneth0      Interface doesn't support scanning.wlan0     No scan resultslo        Interface doesn't support scanning.I have installed the driver for my network card firmware-b43-installer and I know that Wi-Fi has worked previously. My router is located nearby and several other wireless devices are connected to it. Any clues?Edit:The output of rfkill indicates that Wi-Fi is enabled:# rfkill list all0: hci0: Bluetooth        Soft blocked: no        Hard blocked: no1: phy0: Wireless LAN        Soft blocked: no        Hard blocked: noEdit 2:Here is some information about the wireless network card:$ lspci -nn | grep Network03:00.0 Network controller [0280]: Broadcom Corporation BCM4321 802.11a/b/g/n [14e4:4328] (rev 05)$ lspci -knn | grep Net -A203:00.0 Network controller [0280]: Broadcom Corporation BCM4321 802.11a/b/g/n [14e4:4328] (rev 05)        Subsystem: Apple Inc. AirPort Extreme [106b:0090]        Kernel driver in use: b43-pci-bridge
Troubleshooting WIFI - no access points listed
networking;wifi;wicd