Android adb on 64-bit Mint

For some reason, I have to kill and restart the adb server as root in order to be able to use my Android device for development. Otherwise, adb devices displays

    List of devices attached
    ???????????? no permissions

So:

    sudo su

    adb kill-server

    adb start-server

    adb devices

which displays:

    HT849KV01850    device

Don't forget you also need a .rules file in /etc/udev/rules.d - details here. Then execute

    sudo udevadm control --reload-rules