Black screen after using fbcon

Hello,
Starting and using a program that runs on fbcon (with sdl 1.2) works,
but after I quit the program, the screen turns black and stays black,
and the framebuffer console is no longer accessible.

After

SDL_Quit();
exit(0);

I end up with a black screen instead of the Linux framebuffer console
from wich I started the programm. This problem doesn’t occur with other
framebuffer programms that don’t use SDL.

Greetings,
Sebastian