Error: Connection activation failed: Device not ma (2011-03-17 11:56)
分类： troubleshooting
Error: Connection activation failed: Device not managed by NetworkManager
scenario：安装好rhel6后，reboot后，
service network restart， 有此错误弹出
解决方法：
/etc/init.d/NetworkManager stop
chkconfig NetworkManager off
chkconfig network on
service network restart
其实上面就是将NetworkManager服务停止，并设置成开机不随系统启动，然后设置network服务开机随系统启动！ 重启network服务！
原因：
you have problem because both of NetworkManager and Network using same Network driver and default network blocking access for NetworkManager. if you disable NetworkManager your problem will disappeared after restart
或：
#setup
把系统服务 NetworkManager 取消随系统自动启动，只保留network服务随系统启动，因为若NetworkManager和network同时启用的话会产生冲突.
#reboot 设置后重启启动系统
