Now, I found its solution for me It does not happen when I use two language for input one is ubuntu default language (mother language) Korean (Hangul) second is english to input command, password, etc....
At the lock screen, without english , I can't type password it is the very first reason for this issue but, after I add english for input language it changed automatically to english , and it makes me enable to type password where to report this issue? i will suggest it for related to ubuntu language input method team -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1251213 Title: From the lock screen , It happened to unable to type password To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1251213/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs