In the GLX client I can see that gl_lightmode has options described in help: 0 and 1, while default is 2. Furthermore, changing this setting does nothing even with vid_restart, so potential bug or at least the documents need fixing.
Documentation is indeed wrong for it for some reason, thanks
Closing: partially fixed in 3.0.1, and the vid_restart bug fixed in 3.5
Documentation is indeed wrong for it for some reason, thanks
Closing: partially fixed in 3.0.1, and the vid_restart bug fixed in 3.5