Find Graphics Card/Driver Details
Solution 1:
You can use glxinfo (form the meta-utils package) for information about your driver and OpenGL.
Run
glxinfo | grep OpenGL
for info about your driver and OpenGL.
You can use lspci for info about your PCI devices (so, VGA too).
Use
lspci -v -s `lspci | awk '/VGA/{print $1}'`
for info about you video card.
Solution 2:
Follow System Settings - Software & Updates - Additional Drivers