Pycharm with IdeaVim occasionally makes the keyboard unresponsive
Solution 1:
You can do killall -9 ibus-x11
as described in the issue given by Games Brainiac. I just wanted to note that you don't need to restart the IDE, as it should continue to work again... which is nice, undo-history is preserved etc. :)
Solution 2:
This is very likely a bug. Please vote for this issue -> http://youtrack.jetbrains.com/issue/VIM-759
Solution 3:
I have the same problems, i reported it and still do not know of a fix for it. I noticed there are a lot of reported issues like this but i now tried to follow this bug's suggestions:
https://youtrack.jetbrains.com/issue/IDEA-78860
"Alternatively, you can turn off IBus at System Settings | Language Support | Keyboard input method."
After I done this and a system restart, i never had the problem again.