No errors, no libraries left inside directory. I have delete lib and libx64 and remove all mono core libs. Only FNA.dll, FMOD.dll, MojoShader.dll, Lidgren.Network.dll left. Starting bastion, no keyboard.
After that, i testing with an other SLD2 game, and now same effect. No keyboard. What was difference to last test. Library path is set to "~/monolibs", and after removing self compiled SLD2 library, keyboard is back again.
The self compiled SDL2 library was the reason. After removing out from monolib, bastion and towerfall has keyboard.
On my system, compiling SDL2 is not necessary.
Thanks for hint.
Thomas