I boot into ubuntu and it connects to the Wifi network fine. After about 10-15min the DNS stop resolving any website and a couple of minutes later network-managers tells me that I'm disconnected and tries to reconnect constantly to my router and fails to do it. Upon Ubuntu restart everything works fine for the first 10-15min again. When I boot into Mac OS X everything is fine with the same connection!
How do I restart wifi interface?
sudo ifdow wlan0 just tells me that
wlan0 is not configured and
wlan0 doesn't appear in
/etc/network/interfaces either, which I find strange…. (unless network-manager is doing it behind my back).