Mesa provides a 3D graphics API that is compatible with OpenGL. It also provides hardware-accelerated drivers for many popular graphics chips.
The following known issue applies to the Intel 64 and AMD64 architectures:
On an IBM T61 laptop, Red Hat recommends that you refrain from clicking the
glxgears window (when
glxgears is run). Doing so can lock the system.
To prevent this from occurring, disable the tiling feature. To do so, add the following line in the
Device section of
Option "Tiling" "0"