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
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