Nasyarobby, the way I worked around this bug was to either remove or stop NetworkManager when this happened.
$ sudo service network-manager stop -- Text area is disable https://bugs.launchpad.net/bugs/583708 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs