My graphic card is a Mobility Radeon HD 4200 Series.
I tried the 2 answers from What is the correct way to install ATI Catalyst Video Drivers (fglrx) ?
But unfortunately, it does not work for my Mobility Radeon HD 4200
Note
when I raised this question in May 2012, there was only 2 answers to Stephen Myall's question, since then many answers have been added to his post, it is the master post about this subject