A search on your error message gave the result. When you compile with the option WITH_SVGALIB=1, the default configuration automatically includes both SVGAlib drivers (lvga256 and vgalib) which seem to conflict. Either disable one in the configuration or compile without SVGAlib.
Source : http://www.freebsd.org/cgi/query-pr.cgi?pr=115593 Regards Manohar Vanga
