game crashes after intro

[Capitán Centollo]

In my case the error occurs only when i turn on the shadows, but now i have another error, when i press ESC to open the main menu the mouse freezes and the keybord doesn't work, so i have to reinitiate the X server by pressing Ctrl + Atl + Backspace. ¿Any idea of what's wrong?

Also, if i put the shaders option anything better than "Very Low" the game has a lot of graphics glitches.