I found what was causing my problem. /var/lib/NetworkManager/NetworkManager.state had NetworkingEnabled=false and WirelessEnabled=false. I don't know what caused this.
I deleted the file, rebooted, and now I can connect to my network again -- at least the wired network which I use at the office. I'll connecting to a wireless network when I get home.
I found what was causing my problem. /var/lib/ NetworkManager/ NetworkManager. state had NetworkingEnabl ed=false and WirelessEnabled =false. I don't know what caused this.
I deleted the file, rebooted, and now I can connect to my network again -- at least the wired network which I use at the office. I'll connecting to a wireless network when I get home.