Have to reconnect to WiFi every time computer goes to sleep I recently purchased a new MacBook Air (2011) with Lion preinstalled. There is this persistent and incredibly annoying problem that is occurring with the WiFi. Every time I close the lid or let the computer go to sleep, and then begin reusing it, the popup comes up asking me to select a network to join. IT remembers the password, it just wont connect me until I chose a network. This happens every time. Things I've tried:


Restarting computer
Turning WiFi on and then off
Changing encryption of the wireless (even though it happens to all wireless networks)


Has anyone else discovered this problem? Has anyone found a fix for it? Or is it just a bug with Lion that hasn't been fixed yet?
I had the same issue with my 2011 MacBook Air with Lion, and I think it had to do with having changed security preferences on my preferred wireless network. I went to System Preferences > Network > Advanced > WiFi and deleted all existing Preferred Networks, then re-added them. So far, so good. It joins my preferred network automatically after awakening from sleep mode.