Error: Connection activation failed: Device not ma (2011-03-17 11:56)
分類： troubleshooting
Error: Connection activation failed: Device not managed by NetworkManager
scenario：安裝好rhel6後，reboot後，
service network restart， 有此錯誤彈出
解決方法：
/etc/init.d/NetworkManager stop
chkconfig NetworkManager off
chkconfig network on
service network restart
其實上面就是将NetworkManager服務停止，并設定成開機不随系統啟動，然後設定network服務開機随系統啟動！ 重新開機network服務！
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
把系統服務 NetworkManager 取消随系統自動啟動，隻保留network服務随系統啟動，因為若NetworkManager和network同時啟用的話會産生沖突.
#reboot 設定後重新開機啟動系統
