System-Product-Name:~/$ lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 046d:c05a Logitech, Inc. Optical Mouse M90
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 046d:c31d Logitech, Inc. 
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 017: ID 1f53:a014 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

wanqi@wanqi-System-Product-Name:~/huiye_Q9/msm7627-app$ sudo gedit /etc/udev/rules.d/51-android.rules

//添加

# fastboot protocol on crespo (Nexus S)
SUBSYSTEM=="usb", ATTR{idVendor}=="1f53", ATTR{idProduct}=="a014", MODE="0777", OWNER="username"