Comment # 5 on bug 56534 from Alexandre Demers

Forcing MLAA through driconf on Cayman 6950 crashes Gnome Shell if both mlaa
and mlaa color (2D) are set (tested with both set to 8). If one of them is not
set, Gnome Shell doesn't crashes.

MLAA color (2D) seems to have an effect on my Gnome Shell display.