smacnay:/home/smacnay# apt-get install nvidia-glx
Reading package lists... Done
Building dependency tree... Done
Suggested packages:
  nvidia-kernel-source
  The following held packages will be changed:
    nvidia-glx
    The following packages will be upgraded:
      nvidia-glx
      1 upgraded, 0 newly installed, 0 to remove and 31 not upgraded.
      1 not fully installed or removed.
      Need to get 0B/3294kB of archives.
      After unpacking 16.4kB of additional disk space will be used.
      Do you want to continue [Y/n]?
      (Reading database ... 159166 files and directories currently installed.)
      Preparing to replace nvidia-glx 1.0.8762-2 (using .../nvidia-glx_1.0.8774-4_i386.deb) ...
      dpkg-divert: `diversion of /usr/lib/libGL.so to /usr/lib/nvidia/libGL.so.xlibmesa by nvidia-glx' clashes with `diversion of /usr/lib/libGL.so to /usr/lib/nvidia/libGL.so.xlibmesa by nvidia-glx-dev'
      dpkg: error processing /var/cache/apt/archives/nvidia-glx_1.0.8774-4_i386.deb (--unpack):
       subprocess pre-installation script returned error exit status 2
       Errors were encountered while processing:
        /var/cache/apt/archives/nvidia-glx_1.0.8774-4_i386.deb
	E: Sub-process /usr/bin/dpkg returned an error code (1)