Android Linux usb driver 问题

问题如下：

$ adb devices

List of devices attached

???????????? no permissions

解决方法：

$ adb kill-server

$ sudo adb start-server

$ adb devices

如果还是有问题

$ lsusb

Bus 002 Device 003: ID 0000:0000

Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 012: ID 22b8:41db Motorola PCS Motorola Droid (USB Debug)

Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ sudo vi /etc/udev/rules.d/50-android.rules

SUBSYSTEMS=="usb", ATTRS{idVendor}=="22b8", ATTRS{idProduct} =="41db", MODE="0600", OWNER=""

$ sudo chmod a+rx /etc/udev/rules.d/50-android.rules

$ sudo restart udev

$ adb kill-server

$ sudo adb start-server

$ adb devices