Graphic problems in 10.10

[Dave Henley]

I recently upgraded my HP Compaq laptop nw8440 laptop from ubuntu 9.10 to 10.10.
Ever since the screen of laptop trembles, it freezes sometimes with a kind of psychedelic colour effect (pretty cool, but unwanted)

If I hook up a screen to my laptop the problem on my laptop remains while the extra tft screen shows no problem.
So it appears to be a driver problem.

How do I fix this issue.

Greetz,
Dave
 		 	   		  
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