I have found the same issue with Vista and adb. Sometimes I have been able to resolve this by disable debug then clearing all authorised from the android device then re-enabling debug. I wonder if it is something to do with the key pairs on Windows ?
On Sunday, April 24, 2016 at 11:30:54 PM UTC+10, Mark Hansen wrote: > > I've asked this on Stack Overflow, but so far no solution: > http://stackoverflow.com/questions/36816530/why-does-adb-devices-show-unauthorized-with-no-allow-prompt-on-the-device > > I've installed Android Studio 2.0 on my Windows 7 PC. This included the > Android SDK. I've done Android development on this PC before using Eclipse > + ADT and an earlier version of Android Studio, which worked (at that > time). I've uninstalled the old version of Android Studio and installed the > new (current) version. Also, based on the prerequisites for Android Studio, > I've installed Java J2SE 1.8.0 update 92 (JDK). > > Now, when I attempt to connect to my phone (Samsung Galaxy S6) via USB, > 'adb devices' shows 'unauthorized' and I never receive a prompt on the > phone to allow USB debugging. > > I have USB configuration set to MTP and when I plug the phone into the USB > cable, I get the auto-play prompt on the PC and I'm able to see device in > Windows/Explorer and browse its directories, etc. > > I've uninstalled the OEM USB drivers for my device and re-installed them. > I've turned USB Debugging off/on. I've Revoked USB debugging authorization > under developer options on the phone, I've run 'adb kill-server' and 'adb > start-server'. I've tried different USB cables and ports. I've restarted > both the computer and the phone. I've verified there is only one instance > of 'adb.exe' on the PC and that it is in the location identified by > ANDROID_SDK_HOME ($ANDROID_SDK_HOME/platform-tools/adb.exe). > > There was a directory named .android in my $HOME directory which contained > a lot of keys and configuration files, etc., so I uninstalled Android > Studio again and manually moved that directory out of the way and then > re-installed, but this didn't help. > > I'm wondering if there is a setting on the PC (or phone) which tells adb > that we don't need to prompt to allow USB debugging which needs to be > cleared? > > Can someone please help me? > > -- 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 [email protected]. To post to this group, send email to [email protected]. 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/e18f2066-c3c3-4d19-8a97-20efb5a825f0%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
