What connector/cable are you using?
Try using HDMI or DVI specifically. VGA will just give you that "generic display".
Monitors do not normally have any form of drivers that need to be installed. The information that specifies the driver is usually sent over the digital cable(HDMI or DVI) so that the graphics card drivers detect them.
Unfortunately TVs are not the same as normal monitors. They do not necessarily have the ability to communicate its own digital signature to the computer.
It should not really matter actually as long as your graphics driver is installed correctly, the screen will run as it should.