sdl gui based app on remote connection via x11vnc

am trying to open sdl gui based program in freebsd system from remote connection via x11vnc. there is no display connected to the pc therefor i used a dummy driver. keep getting this error > libGL error: MESA-LOADER: failed to open swrast: Cannot open "/usr/local/lib/dri-devel/swrast_dri.so" (search paths /usr/local/lib/dri-devel, suffix _dri) libGL error: failed to load driver: swrast X Error of failed request: BadValue (integer parameter out of range for operation) Major opcode of failed request: 150 (GLX) Minor opcode of failed request: 3 (X_GLXCreateContext) Value in failed request: 0x0 Serial number of failed request: 234 Current serial number in output stream: 235 i tired to set SDL_VIDEODRIVER=dummy but then the program works without seeing any trace of the sdl app GUI