Wifi won't turn on since upgrade to Lion
First of all, my apologies if i make alot of gramar/spell errors, english is not my native language.
Yesterday i've upgraded my Snow Leopard installation to Lion on my late 2008 macbook pro and from the beginning i am unable to start my Wifi/Airport card. The menu bar shows the wifi icon but with no signal bars. When i click the wifi icon and press 'Turn wifi on' nothing happens. System profiler shows the airport card and when i look in Console i can see that the system recognizes the wifi card and acknowledge it's mac address.
What i've tried so far:
- I've created another user account
- I performed a clean install on a second harddrive, same problem
- i rolled back to Snow Leopard and the airport card functions as it should be, this rules out a hardware failure
- I've deleted all files in /library/preferences/SystemConfiguration and rebooted
- I've created a new location with only the Airport card under System preferences - Network
- I've made the airport card inactive and active again
I did found some strange messages in Console but they are not very clear: http://imageshack.us/photo/my-images/718/screenshot20110721at102.png/
MacBook Pro, Mac OS X (10.7)