dpkg -l |grep nvidia
ii  bumblebee-nvidia                                            3.2.1-90~trustyppa1                                              i386         NVIDIA Optimus support using the proprietary NVIDIA driver
pc  nvidia-331                                                  331.89-0ubuntu5                                                  i386         NVIDIA binary driver - version 331.89
ii  nvidia-343                                                  343.22-0ubuntu1~xedgers14.10.1                                   i386         NVIDIA binary driver - version 343.22
ii  nvidia-343-uvm                                              343.22-0ubuntu1~xedgers14.10.1                                   i386         NVIDIA Unified Memory kernel module
ii  nvidia-common                                               1:0.2.98.3                                                       i386         transitional package for ubuntu-drivers-common
ii  nvidia-opencl-icd-343                                       343.22-0ubuntu1~xedgers14.10.1                                   i386         NVIDIA OpenCL ICD
ii  nvidia-prime                                                0.6.6                                                            i386         Tools to enable NVIDIA's Prime
ii  nvidia-settings                                             343.13-0ubuntu1~xedgers14.10.1                                   i386         Tool for configuring the NVIDIA graphics driver