I recently installed Ubuntu 14.04 on a computer with a Broadcom BCM4312 802.11b/g LP-PHY wireless card. After installing the proprietary drivers available from the Ubuntu repositories, I was able to see other wifis (my neighbours') APs, but not mine. I tried several drivers without success. I decided then to try Fedora, but after installing kmod-wl
from the RPM Fusion repositories, I found the same problem. Of course, I also tried rebooting and resetting the router many times between installations and configuration changes...
The strange thing is that I am able to connect to the router from a different computer and from a mobile phone, but still I can't see the router's ESSID from this computer with the BC card, while I do see my neighbours' ESSIDs. What could be the problem?