Comment 8 for bug 272474

Yes, indeed it should be marked as enabled afterwards, so that's a bug. It checks the following things in order to consider a driver as enabled:

  - xorg.conf must have Driver "nvidia", which seems to be the case according to comment 5

  - if xorg.conf is invalid (syntax error, etc.), it is regarded as "disabled". This isn't the case here (with your xorg.conf)

  - the package nvidia-glx-96 is installed; does "dpkg -s nvidia-glx-96" succeed and show you the package description?

  - the module nvidia is not blacklisted (I don't think that's the case); this should give no results:

       grep -r 'blacklist.*nvidia' /etc/modprobe.d

  - the nvidia module is available; does "modinfo nvidia" succeed and show you the module description?

I suspect that the last item fails, and the module is not available, but I'll wait for your answer before theoretizing further. Thanks!