Establishing MTP connection for Android Studio I am trying to connect an Android device to my PC in order to use it to test an app created with Android Studio. After connecting the device, I don't get the usual USB connection notification on my device and nothing shows up in my PC's file manager either.
I tried using both my Honor 5x (Android 6) and Nexus 9 (Android 7) as well as Windows 10 and Elementary OS and multiple ports/USB cables. On the Nexus 9, I enabled the developer options and set the connection mode to MTP.
Is there something obvious I'm missing?
Android Studio needs a device connected in ADB not MTP, though MTP can be activated with no effect. 

On the device: 


Open the Developer options
Enable USB debugging. 
You  need to install drivers for the device to get detected by the PC. 


On the PC, Android Studio:


Alt + F10  should open a window showing your device connected


Then you'll be able to test apps build with Android Studio