https://bugs.freedesktop.org/show_bug.cgi?id=29226
--- Comment #10 from Michal Suchanek hramrach@centrum.cz 2010-08-08 04:41:05 PDT --- ok, so hte r300 gallium driver was only misnamed.
The ligtning issue does not happen with r300g or r300 but does happen with llvmpipe when none of the dri modules can be found.