root@ubuntu:/home/thomas/Desktop# dpkg -i nvidia-glx_1.0.8762-2_i386.deb
dpkg - warning: downgrading nvidia-glx from 1.0.8762+2.6.15.11-3 to 1.0.8762-2.
(Reading database ... 100361 files and directories currently installed.)
Preparing to replace nvidia-glx 1.0.8762+2.6.15.11-3 (using nvidia-glx_1.0.8762-2_i386.deb) ...
dpkg-divert: `diversion of /usr/lib/xorg/modules/extensions/libglx.so to /usr/lib/nvidia/libglx.so.xlibmesa by nvidia-glx' clashes with `diversion of /usr/lib/xorg/modules/libglx.so to /usr/lib/nvidia/libglx.so.xlibmesa by nvidia-glx'
dpkg: error processing nvidia-glx_1.0.8762-2_i386.deb (--install):
 subprocess pre-installation script returned error exit status 2
Errors were encountered while processing:
 nvidia-glx_1.0.8762-2_i386.deb