dpkg -l | grep nvidia
ii  libkwinnvidiahack4                   4:4.8.4a-0ubuntu0.1                     library used by nvidia cards for the KDE window manager
ii  nvidia-common                        1:0.2.44                                Find obsolete NVIDIA drivers
ii  nvidia-current                       295.40-0ubuntu1                         NVIDIA binary Xorg driver, kernel module and VDPAU library
ii  nvidia-current-updates               295.49-0ubuntu0.1                       NVIDIA binary Xorg driver, kernel module and VDPAU library
ii  nvidia-settings                      295.33-0ubuntu1                         Tool of configuring the NVIDIA graphics driver
ii  nvidia-settings-updates              295.33-0ubuntu1                         Tool of configuring the NVIDIA graphics driver