WiFi lesson…
For the past few days I wondered why my laptop refused to connect to my wireless access point in my study, instead insisting to connect to the wireless router in the basement. As my study is one floor up, with hard concrete walls and floors seperating them, the resulting signal was abysmal.
As both networks were configured to use the same SSID, theoretically they should both be visible to the laptop and the strongest signal should have been chosen. Indeed, an ‘iwconfig wlan0 scan’ command showed that both access points were visible. As I had configured them with the same WPA2 passkey, I could not figure out why it refused to connect to the nearest access point.
After a few days, it suddenly hit me: I had one access point configured to allow for WPA/WPA2 connections and the other access point for WPA2 only. This is enough of a difference to force Ubuntu into thinking that these are different access points. What is strange though, is that they do not should up in the wireless network browser as two different networks. I know that my Android phone has no problem connecting to the nearest network, regardless of WPA settings.
Anyway, fixed now… 
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