debug method related for color patches

[Jeffrin Jose <ahiliation@yahoo.co.in>]

hello all,

i use GNOME 3 related on Debian.
sometimes i see color patches on screen.
suppose i point my mouse to "activities" part on the
top left part of the screen and then back again and 
then open windows come to it's original size. then
the color patch is cleared.

i used fglrx driver for my Radeon chipset
what exactly is happening ?
i would like to know where to start debugging and
what kind of tool or tools should be used to do that.


Thanks.
/Jeffrin.


-- 
software engineer
rajagiri school of engineering and technology