The radeon renderer passes mesa's fog test for all cases, but some existing
apps/games (namely wolfenstein) fail to draw with fog at all. In some apps some
objects will have fog while other will not. Reverting the changes from
https://bugs.freedesktop.org/show_bug.cgi?id=4900 partial fixes the problem, but
causes the mesa fog test for non-fogcoord cases to fail again.
I'm using a Radeon Mobility 7500 in a Thinkpad T41 with the mesa and drm cvs.
The xorg version is 6.9.0
Mass version move, cvs -> git