Got the same thing. Was wondering whether I should report it first, or try the default 2.0b13 kernel, or dive into the source and figure out how the display is dimmed, so I ended up doing none of the above

In any case, when the player powers up it is often quite dim, flipping the dimmer settings down to 90 and back up to 100 'cures' it, and sometimes simply toggling the headlights fixes it.