I just installed Android Studio (v1.4) on Ubuntu 15.04 (64) and am unable to connect to my Moto G (Android 5.0.2) to run the application I made from a tutorial.
Wh
Ok I found the solution
Turns out I had 2 ADB installed in different Paths and Android studio was getting one of them that was not the correctly configured. I also had not properly set up the udev rules.
Here are the step I took to get it fixed
1. Remove ADB that was installed manually
2. Modify the udev rules to add the devices (It turns out that both my Nexus 7 and Moto G were not Asus and Motorolla respectively but Google inc instead. I acquired the right Vendor ID code using "lsusb" It returns XXXX:YYYY the vendir iD is the XXXX
3. Add the location of the right adb to path ( /Sdk/platform-tools/)
4. Then rebooted all of the devices (computer and android devices) and it seems it worked.
Sorry for not giving out all the terminal lines that were entered, being novice with Ubuntu it may have been a lot more confusing than helping.
Hopefully it can help someone that is in the same situation.