NVIDIA has released an update legacy driver for their GeForce 8 and 9 series under Linux

Release highlights since 340.106:

Updated nvidia-installer in the 340.xx legacy driver series to default to installing the driver without the NVIDIA Unified Memory kernel module if this module fails to build at installation time. The 340.xx legacy Unified Memory kernel module is incompatible with recent Linux kernels, and the GPU hardware generations that the 340.xx legacy driver series is intended to support do not support Unified Memory.
Added support for X.Org xserver ABI 24 (xorg-server 1.20).
Improved nvidia-bug-report.sh to check for kern.log which is the default kernel log-file location for many Debian-based Linux distributions.
Fixed a bug which could cause X servers that export a Video Driver ABI earlier than 0.8 to crash when running X11 applications which call XRenderAddTraps().

  NVIDIA 340.107 Linux, Solaris, and FreeBSD driver