title: USB device exceeds power limits
body: <p>OK, the <code>android studio</code> really drive me crazy. </p>
  
  <p>At first, AVD cannot launch and I have post my issue here to <a href="https://stackoverflow.com/questions/33417842/avd-not-running">AVD not running</a> and failed to create new virtual device <a href="https://stackoverflow.com/questions/33419733/throwable-failed-to-create-the-sd-card">Throwable: Failed to create the SD card</a></p>
  
  <p>After install Android SDK Tool from sdk manager and HAXM installer, it finally can lunch but <a href="https://stackoverflow.com/questions/33527421/emulator-cannot-start-up">emulator cannot start up</a>.</p>
  
  <p>After I increase the emulator memory, my emulator works fine but I cannot use real device to run my project. </p>
  
  <blockquote>
    <p>Error: Power Surge On Hub Port: A USB device has exceeded the power
    limits of its hub port</p>
  </blockquote>
  
  <p>I'm not sure whether the error exists is due to the emulator setting because it can run before  the emulator memory get increased. Anyone can help? It totally frustrating.</p>