It has happened since the first time I played it. When asked to enter my kingdom name, I couldn't type anything into the fillform. Luckily, I managed to go back to the start screen, and somehow there was already a Kingdom of Fe. So I start playing for about one hour without getting through the tutorial. While playing, I can use the keyboard shortcuts, that means my keyboard were detected alright. Then I thought I wanted to start over, so I deleted the Kingdom of Fe, and when I tried to make a new kingdom, I remembered that I can't type. Now I can't play it at all.
Logging in to my Desktop Dungeon is impossible too.
I'm using Arch Linux.