I just tried a second device (this one is a Samsung Galaxy Note 10.1 2014 Edition tablet) which was also previously working (with the older version of ADT) and it reacts the same way (unauthorized). I then tried my wife's brand new note 5 and to my surprise, it does the same thing. I tried all the steps from my original post, but it still shows as unauthorized by 'adb devices'.
What could the problem be? As reported above, I've uninstalled Android Studio (and ADT) and re-installed. Is it possible there's a problem with this version of Android Studio (and/or ADT)? What can I do to debug this problem? Is there any way to turn on extended debug logging? Thanks for any help. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. To post to this group, send email to android-developers@googlegroups.com. Visit this group at https://groups.google.com/group/android-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/android-developers/2d985398-9b49-472d-bb32-bcc8ce5ba4f8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.