Nexus 7 debug mode connected/disconnected and vice versa During development on an app, i plug in the nexus 7 in my ubuntu and mac. The USB Debugging icon on the notifications always connected/disconnected and vice versa.  How do i keep this from happening and displays always in debugging mode?

i attempt to fix it by these steps:


restarted adb
rebooted device
revoke usb debugging authorization


tried all of these but nothing happens.
Check your USB cable it must be lose.