This guide will attempt to help you diagnose or repair your video (graphics card) driver issue.
This guide will not go into great detail but will give some basic pointers. It will also help you to get support from the Kwheezy support channels. If you need support, following this guide first will speed up the process.
We will consider two main categories of failure:
1.) Failure to boot into a graphical session. This graphical session that provides a login and then a graphical desktop is provided by a service called 'X'. Also commonly refered to as Xorg or "the X ...