I have a Macbook Pro (model 10,1) running OS X 10.9.3 (13D65) with a wireless problem; it keeps dropping connection. That is, it says it's connected, but if you ping a host…even localhost…the packets aren't returned for a period of time, then it comes up, only to lose connection after a few seconds, then it stays down for awhile before cycling back up again. If you turn off the wireless, it can ping localhost just fine. And a wired Ethernet connection works fine.
While troubleshooting I found this line in the logs:
_handleLinkEvent: Got an error trying to queyer WiFi for power. Resetting state variables.
That makes me suspect a hardware issue with the Airport card, but I can't seem to find documentation about that error anywhere. Does anyone know what would cause this or if there's another cause beyond hardware failure?
Best Answer
Example on my MBA 10.9.3
So that is a normal message following a drooped connection or closing the lid.
Open your console and report the lines before that message to see who is shutting your airport down.
Run netstat -i to get a overview of all ongoing activity
sample
Run Airport -I to get more information on the current connection.
sample
For debugging and monitoring you can use the build in tool.
Hold the alt key and click on the WiFi icon
at the bottom of the pop up you will find the Open Wireless Diagnostics
In the new window that opens select Utilities in the Window tab.
Run test like Performances to see the signal stability