How to fix no permission error for android devices on Ubuntu 14.04

On Ubuntu 14.04, adb devices command may return

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

This is because current user doesn't have permission to detect the device. This may be solved in two ways. One is starting adb as root after killling all adb processes. Because root user has permissions for all vendors, almost any android device is detected.

But second solution is more handy.
Defining vendors and letting your-current-user access these vendors will resolve this issue. To achieve this,

1. Create a file /etc/udev/rules.d/51-android.rules with following content ( 70-android.rules should be the name of file on Ubuntu 12.04)
   

   
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0bb4", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0e79", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0502", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0b05", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="413c", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0489", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="091e", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="18d1", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0bb4", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="12d1", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="24e3", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="2116", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0482", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="17ef", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="1004", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="22b8", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0409", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="2080", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0955", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="2257", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="10a9", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="1d4d", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0471", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="04da", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="05c6", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="1f53", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="04e8", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="04dd", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0fce", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="0930", MODE="0666"
   SUBSYSTEM=="usb", ATTRS{idVendor}=="19d2", MODE="0666";
   

2. Customize permissions and owner for this file with following commands:
   

   
   sudo chmod 644   /etc/udev/rules.d/51-android.rules
   sudo chown root:root /etc/udev/rules.d/51-android.rules
   

3. Restart adb and reconnect your device.

   
   sudo killall adb
   ./adb start-server
   

4. Reconnect your device. adb devices should return a list that includes your device.