title: ADB on Linux Mint 17.1 doesn't recognize Zenfone 5 with Android Kitkat 4.4.2
body: <p>As described in the title, ADB v4.2.2 in Linux Mint 17.1 KDE with latest updates doesn't recognize my Zenfone 5 A501 with Android Kitkat 4.4.2 with latest updates.
  When I tried:</p>
  
  <blockquote>
    <p>adb devices</p>
  </blockquote>
  
  <p>the output is always </p>
  
  <pre><code>List of devices attached 
  ????????????    no permissions
  </code></pre>
  
  <p>despite I plugged/unplugged.
  My laptop didn't have Windows so I can't check.
  Please help me. 
  Thanks a lot. </p>