Comment 1 for bug 201567

some info about the legacy nvidia drivers:

Package: nvidia-glx-legacy
Maintainer: Ubuntu Kernel Team <email address hidden>
Architecture: i386
Source: linux-restricted-modules-2.6.22 (2.6.22.4-14.10)
Version: 1.0.7185+2.6.22.4-14.10
Description: NVIDIA binary XFree86 4.x/X.Org 'legacy' driver
 These XFree86 4.x/X.Org binary drivers provide optimized hardware acceleration
 of OpenGL applications via a direct-rendering X Server and supports the TNT,
 TNT2, TNT Ultra, GeForce, and GeForce2 chipsets. AGP, TV-out and flat panel
 displays are also supported.
 .
 This is the 'legacy' driver for older chipsets. Unless your chipset is
 explicitly listed in the above paragraph, please use the nvidia-glx driver,
 which is much more up to date.
 .
 To enable the driver, run "sudo nvidia-glx-config enable".